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ASRock Steel Legend SL-850G vs Cooler Master V850 SFX Gold ATX 3.1

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Product A: ASRock

Steel Legend SL-850G

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B

Product B: Cooler Master

V850 SFX Gold ATX 3.1

53 of 66 known

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Only differences

AASRock Steel Legend SL-850G

BCooler Master V850 SFX Gold ATX 3.1

General

4 of 12 differ

Series

Steel Legend3Retailer pageinside-tech.co.uk/power-supplies-2/asrock-steel-legend-sl-850g-850w-atx-power-supply-unit-80-plus-gold-certified-120mm-silent-cooling-fan-high-efficiency-psuRead 14 October 2026The listing copies ASRock's Steel Legend text and spec table.

V SFX1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Series V SFX Series. The maker sells three hardware generations under the name V850 SFX Gold: the original (MPY-8501-SFHAGV-US, 2020), an ATX 3.0 model (MPY-8501-SFHAGV-3U1, 2023) and this ATX 3.1 model (MPY-8501-SFHAGV-3E**, 2024). This file covers the ATX 3.1 model.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

SL-850G, SL-850GW6Retailer pagegeizhals.de/asrock-steel-legend-sl-g-atx-3-1-v184341.htmlRead 14 October 2026Geizhals lists the SL-850G with the manufacturer number 90-UXS085-GFEAAA, stored as an alias. The SL-850GW is the white model in the 80 PLUS list, the Cybenetics report and retail listings.

MPY-8501-SFHAGV-3U1, MPY-8501-SFHAGV-3EUS, MPY-8501-SFHAGV-3EUK, MPY-8501-SFHAGV-3EEU, MPY-8501-SFHAGV-3EWU, MPY-8501-SFHAGV-3EWK, MPY-8501-SFHAGV-3EWE1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Model MPY-8501-SFHAGV-3E** for the black unit. The regional codes are in the product sheet.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Packing information lists twelve regional codes, -3EUS, -3EUK, -3EEU, -3EST, -3EAU, -3EBR, -3EKR, -3ETW, -3EJP, -3EIN, -3EAR and -3EWO. The file stores the US, UK and EU codes.4Maker product pagecoolermaster.com/en-global/products/v850-sfx-gold.htmlRead 15 October 2026The US page is titled V850 SFX Gold ATX 3.1 and prints model MPY-8501-SFHAGV-3U1. Its specification table is older. It says SFX 12V Ver. 3.42 only, lists no 12V-2x6 connector and links the 2021 product sheet. Third parties such as Newegg and MODDIY call 3U1 the 2023 ATX 3.0 model. The maker's own page and Amazon title say ATX 3.1, so 3U1 is stored as the US row. See the doubts.5Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1-white-edition.htmlRead 15 October 2026Specifications: Model MPY-8501-SFHAGV-3EW* for the white edition.6Maker spec sheet (PDF)coolermaster.egnyte.com/dl/nrX314CcEHRead 15 October 2026Item code MPY-8501-SFHAGV-3EW*. The packing table lists twelve regional codes, of which -3EWU, -3EWK and -3EWE are stored.8Retailer pageamazon.com/dp/B08LP6WS35Read 15 October 2026Item details: Model Number and Mfr Part Number MPY-8501-SFHAGV-3U1, Model Name V850 SFX Gold. The title says ATX 3.1, 12V-2x6 cable, Cybenetics Gold and Noise A-. The built-in media line says V850 SFX ATX 3.0.

GTIN / EAN

Not available

4719512148136, 4719512148150, 4719512148167, 4719512148471, 4719512148495, 47195121485012Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Packing information: EAN 4719512148136 for -3EUS, 4719512148150 for -3EUK and 4719512148167 for -3EEU. The sheet also lists a separate UPC per code, such as 884102120459 for -3EUS. The EAN is stored.6Maker spec sheet (PDF)coolermaster.egnyte.com/dl/nrX314CcEHRead 15 October 2026Packing information of the white edition: EAN 4719512148471 for -3EWU, 4719512148495 for -3EWK and 4719512148501 for -3EWE.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

Not available

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Status

Available3Retailer pageinside-tech.co.uk/power-supplies-2/asrock-steel-legend-sl-850g-850w-atx-power-supply-unit-80-plus-gold-certified-120mm-silent-cooling-fan-high-efficiency-psuRead 14 October 2026UK retailer listing shows the unit in stock in October 2026.6Retailer pagegeizhals.de/asrock-steel-legend-sl-g-atx-3-1-v184341.htmlRead 14 October 202621 offers listed.

Available1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Page is live in the current V SFX Series catalog with a buy button.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

Not available

Not available

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Steel Black, Steel White3Retailer pageinside-tech.co.uk/power-supplies-2/asrock-steel-legend-sl-850g-850w-atx-power-supply-unit-80-plus-gold-certified-120mm-silent-cooling-fan-high-efficiency-psuRead 14 October 2026ASRock's series text on the page: available in Steel Black and Steel White. SL-850G is the black model and SL-850GW the white model.4Reviewfunkykit.com/reviews/power-supplies/asrock-steel-legend-sl-850g-850w-power-supply-reviewRead 14 October 2026Page 2 quotes ASRock: the series is available in Steel Black and Steel White.

Black, White5Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1-white-edition.htmlRead 15 October 2026V SFX Gold 850W ATX 3.1 White Edition. The specification table is the same as the black unit.

Form factoriThe physical size standard that decides what fits in the case. An ATX unit is 150 × 86 mm at the back. An SFX unit is 125 × 63.5 mm.

ATX2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 3 gives the 150 x 150 x 86 mm body of an ATX unit.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026DUT Information: Type ATX12V.

SFX1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Form Factor SFX. Dimensions 100 x 125 x 63.5 mm. The back face is 125 x 63.5 mm, the standard SFX size. The unit ships with an SFX-to-ATX bracket.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026

ATX versioniThe ATX12V design guide revision the maker claims compliance with. A 16-pin GPU cable alone does not establish ATX 3.x. A Cybenetics report that withholds its ATX badge does not change the maker's claim. It goes in the source note.

ATX 3.12Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Back of the retail box (photo on page 2): Meets ATX 3.1 Specification. The overview says ATX 3.1 and PCIe 5.1 compliant.

ATX 3.11Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: ATX Version ATX 3.1 & SFX 12V Ver. 3.42. Overview: ATX 3.1 support and a 90-degree 12+4pin (12V-2x6) PCIe 5.1 connector.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Specifications: ATX Version ATX3.1 & SFX 12V Ver. 3.42. Features: ATX 3.1 support and a 90-degree 12+4pin (12V-2x6) PCIe 5.1 cable.

PCIe CEM versioniThe PCI Express card power revision the maker claims, as printed next to the ATX version. It sets the GPU power connector rules. It is not a slot speed. A reviewer's statement is not enough.

PCIe 5.12Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Back of the retail box: Native Durable 105C PCIe CEM 5.1 12+4-pin Cable.

PCIe 5.11Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Overview: a 90-degree 12+4pin (12V-2x6) PCIe 5.1 connector.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Features: 90-degree 12+4pin (12V-2x6) PCIe 5.1 cable.

Modular cablesiFull means every cable detaches. Semi means some cables are fixed, usually the 24-pin and CPU cables.

Fully modular2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Overview: Fully Modular design.

Fully modular1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Modular Fully Modular.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Features: fully modular cabling.

Built by (OEM)iThe company that designed and built the unit for the brand, such as CWT or FSP. As named by the maker, a teardown review or a Cybenetics report.

HEC2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 4: this power supply is an OEM partner design from HEC.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026DUT Information and Parts Description: OEM/ODM HEC.

Gospower7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026DUT Information: OEM/ODM Gospower.

Power

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Rated continuous poweriThe continuous DC output the maker rates the unit for, such as 850. Peak or power excursion figures are not stored here.

850W7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026DUT Information: Rated Power 850 W. The Power Specifications table gives a total maximum power of 850 W.

850W1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Watts 850W.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026

Full power rated up toiThe ambient temperature up to which the maker rates full continuous power, such as 50 °C. A review table that prints 0-50 °C with no maker source is not enough. An operating temperature range that does not say full power is not enough. A maker table with load steps gives the full-load row, such as 40 °C at full load next to 50 °C at 80 percent load. A temperature that a Cybenetics report marks as manufacturer-provided counts as a maker statement.

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12V rail designiHow the maker splits +12V over-current protection. Switchable means the user picks single or multi rail with a switch or in software.

Single rail4Reviewfunkykit.com/reviews/power-supplies/asrock-steel-legend-sl-850g-850w-power-supply-reviewRead 14 October 2026Review text quotes ASRock: a powerful +12V single rail at 70.9A, up to 850W.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Power Specifications table lists one +12V column, 70.9A.

Single rail2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026The power table has one +12V column with 70.8A and 849.6W.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Power Specifications: one +12V column, 70.8 A and 849.6 W.

+12V max currentiHighest combined current on +12V from the maker's power table. For a multi-rail unit this is the combined total, not one rail.

70.9A2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 3: the unit delivers 70.9A on the main +12V rail. The retail box DC output table lists +12V 70.9A.

70.8A2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026DC output: +12V 70.8A.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Power Specifications: +12V 70.8 A.

+12V max poweriHighest combined power on +12V from the maker's power table.

850W2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Retail box DC output table, combined power row: +12V 850W, total output power 850W.

849.6W2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Total power: +12V 849.6W, total 850W.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Power Specifications: +12V 849.6 W, total 850 W.

+3.3V and +5V combined poweriThe combined limit for the +3.3V and +5V rails from the maker's power table. A table that prints the same figure under both rails, as be quiet! does, shows one shared limit, so the figure is stored once and not added.

120W2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 3: +3.3V and +5V can each deliver 20A for a total of 120W. The retail box table lists 120W for the combined +3.3V and +5V power.

120W2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Total power: one 120W cell for +3.3V and +5V, 20A each.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Power Specifications: one merged 120 W cell for 3.3V and 5V, 20 A each.

+5V standby currentiHighest current on the +5VSB standby rail. It powers USB charging and wake functions while the PC is off.

3A2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Retail box DC output table: +5Vsb 3A, 15W.

3A2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026DC output: +5Vsb 3A, 15W.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Power Specifications: 5VSB 3 A, 15 W.

AC input voltageiThe rated AC input range, such as 100 to 240 V.

Lowest100Highest240V2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Retail box specifications: AC input 100-240V, 50-60Hz, 10-5A.

Lowest100Highest240V1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Input Voltage 100-240V, input current 12-6A, 50-60Hz.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026AC input 100-240V~, 12-6A, 50-60Hz.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Manufacturer-provided information: 100-240 Vrms, 6-12 A, 50-60 Hz.

Alternative low power mode (ALPM)iThe maker or a Cybenetics report states support for the ATX alternative low power mode used by Modern Standby.

Yes7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked. ATX v3.1 PSU Power Excursion is also checked.

Yes7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Temperature and Compliance Info: ALPM compatible ticked. ATX v3.1 PSU Power Excursion ticked.

Certifications

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80 PLUS ratingiThe 80 PLUS level. When the 80 PLUS listing or certificate and the maker claim differ, store the listing level and put the claim and test voltage in the source note. When a model has several 80 PLUS entries, such as a newer test at a higher level, use the newest entry that matches the current maker documents.

80 PLUS Platinum8Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/ASROCK_SL-850G_850W_SOCE%207601_Report_0.pdfRead 14 October 202680 PLUS list entry ID 7601, model SL-850G, 850W, 80 PLUS Platinum, tested 10/10/2024 at 115V nominal and 60 Hz (typical efficiency at 50% load 92.18%). ASRock's box and spec sheet claim 80 PLUS Gold, so the listing level is stored. The SL-850GW has its own Platinum entry, ID 14023.

80 PLUS Gold1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: 80 PLUS Rating 80 PLUS Gold, 90% at typical load. This is the maker's claim. The 80 PLUS list has no entry for the ATX 3.1 model. Its only entry for the base code MPY-8501-SFHAGV is dated 2020-01-24, belongs to the original model and shows Platinum, so it is not used.

Cybenetics efficiency at 115ViThe Cybenetics ETA level from the 115V test. The Cybenetics report wins over the maker's claim.

Cybenetics Platinum7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Report 24PS2548A, certification ID 252548, tested and issued Aug 24, 2024. ETA Platinum at 115V (badge image). The report names the model SL-850G / SL-850GW and says the results apply to both the black and white models.

Cybenetics Gold7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Report 24PS2598A, Lab ID CM85002598, model V SFX Gold 850 (ATX v3.1), sample serial MPY8501SFHAGV3EEU1243500002 (the EU model), received Sep 23, 2024, tested Oct 8, 2024, issued Oct 9, 2024. The certificate shows the ETA Gold badge at 115V. The Amazon US title says Cybenetics Gold and Noise A-.

Cybenetics efficiency at 230ViThe Cybenetics ETA level from the 230V test. The 230V thresholds are higher, so the level can differ from the 115V level. The Cybenetics report wins over the maker's claim.

Cybenetics Platinum7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026ETA Platinum at 230V (badge image).

Cybenetics Gold7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026The certificate shows the ETA Gold badge at 230V.

Cybenetics noise at 115ViThe Cybenetics LAMBDA level from the 115V test. A++ is the quietest. The Cybenetics report wins over the maker's claim.

A+7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026LAMBDA A+ at 115V (badge image). The measured average of 18.27 dBA fits A+. ASRock listings that print LAMBDA A refer to the series, so the report level is stored.

A-7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026The certificate shows the LAMBDA A- badge at 115V. Average noise of 29.21 dBA is in the A- band.

Cybenetics noise at 230ViThe Cybenetics LAMBDA level from the 230V test. The Cybenetics report wins over the maker's claim.

A+7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026LAMBDA A+ at 230V (badge image). The measured average at 230V is 17.54 dBA.

A-7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026The certificate shows the LAMBDA A- badge at 230V. Average noise at 230V is 28.60 dBA.

Measured

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Average efficiency at 115V (measured)iAverage efficiency over the whole load range at 115V input, from more than 1450 load combinations in the Cybenetics method. It is not the peak efficiency or the efficiency at 50% load.

89.823%7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Average over more than 1450 load combinations at 115V. Ambient 28-32 C. Sample received Aug 9, 2024.

87.894%7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Average over more than 1450 load combinations at 115V, ambient 28-32 C. At 230V it is 90.298%.

Average efficiency at 230V (measured)iThe same average efficiency at 230V input.

91.931%7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Average over more than 1450 load combinations at 230V.

90.298%7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Average over more than 1450 load combinations at 230V.

Light-load efficiency at 115V (measured)iEfficiency at a 10 W load for units up to 500 W, or at a 2% load for larger units, at 115V input. This is the ATX light-load test.

70.773%7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Efficiency at 2% load at 115V. The unit is above 500 W, so the 2% load applies. At 230V it is 72.136%.

67.765%7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Performance summary line for 2% load (more than 500 W unit) at 115V.

Average power factor at 115V (measured)iAverage power factor over the whole load range at 115V input. 1 is the best possible value.

0.9827Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Average over more than 1450 load combinations at 115V. At 230V it is 0.944.

0.987Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Average over more than 1450 load combinations at 115V. At 230V it is 0.942.

Average noise at 115V (measured)iAverage noise over the whole load range at 115V input in the Cybenetics method, at about 30 °C ambient. It is not the noise at full load.

18.27dB(A)7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Average over more than 1450 load combinations at 115V, ambient 28-32 C, Bruel and Kjaer 2270 G4 sound analyzer. The 230V average is 17.54 dBA.

29.21dB(A)7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Average over more than 1450 load combinations at 115V, ambient 28-32 C, Bruel and Kjaer 2270 G4 sound analyzer.

Noise at full load at 115V (measured)iNoise at 100% load at 115V input in the Cybenetics typical load tests. That row often runs at about 45 °C intake. The intake temperature and the fan speed go in the source note. Lower is better.

39.5dB(A)7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Typical load tests at 115V, 100% load row: 39.5 dB(A) at 1679 rpm fan speed, ambient about 30 C.

43dB(A)7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Typical Load Tests at 115V, 100% load row: 43 dB(A) at 2847 rpm, intake 45.81 C.

Standby power with no load at 115V (measured)iPower the unit draws from the wall with the PC off and nothing drawn from +5VSB, at 115V input.

0.0556W7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Standby power consumption at 115V with no load on +5VSB. At 230V it is 0.1105 W.

0.0441W7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Standby power consumption at 115V with no load on +5VSB: 0.0441 W. At 230V it is 0.1110 W.

Hold-up time (measured)iHow long the outputs stay in regulation after AC power is lost, at maximum continuous load, as printed in the Cybenetics report. The report names no input voltage. The AC loss to PWR_OK time goes in the source note. Higher is better.

18.2ms7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 18.2 ms, AC loss to PWR_OK 15.7 ms, at maximum continuous load. Report 2548.

22.5ms7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 22.50 ms, AC loss to PWR_OK 19.20 ms, PWR_OK inactive to DC loss 3.30 ms, at maximum continuous load. The report names no input voltage. The maker's 16 ms is a claim and is not stored.

12V ripple at full load (measured)iPeak-to-peak ripple on the +12V rail at full load and 115V input. Lower is better.

44.38mV7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Non-accredited. 12V ripple at full load at 115V. At 230V it is 46.46 mV.

19.55mV7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Non-accredited. 12V ripple at full load at 115V: 19.55 mV. At 230V it is 21.47 mV.

12V load regulation (measured)iHow far the +12V voltage moves between light and full load at 115V input. Lower is better.

0.36%7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Non-accredited. 12V load regulation at 115V. At 230V it is 0.41%.

1.47%7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Non-accredited. 12V load regulation at 115V: 1.47%. At 230V it is 1.49%.

Cables and connectors

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CablesiOne row per kind of cable that runs from the PSU to a device. Connector is the plug at the device end. Count is the number of those plugs over all cables in the row. Length runs from the PSU end to the first plug. Adapters that plug into other cables are left out. Use 16-pin PCIe when the maker names a 16-pin GPU cable without saying 12V-2x6 or 12VHPWR. A cable from a 12V-2x6 socket on the PSU to 8-pin plugs is a cable, not an adapter, and counts as PCIe 8-pin. When the maker's documents name one GPU cable both 12VHPWR and 12V-2x6, use 16-pin PCIe and name both in the source note. Cables of one connector kind with different lengths or wire gauges get one row each.

AASRock Steel Legend SL-850G

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	600	18AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	650	18AWG	Not available
PCIe 8-pin (6+2)	5	3	600	18AWG	Not available
12V-2x6	1	1	650	16AWG	600
SATA power	9	3	450	18AWG	Not available
4-pin Molex	3	1	450	18AWG	Not available

Source2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Retail box Cables Included drawing: 1x MB 20+4 pin 600 mm, 2x CPU 4+4 pin 650 mm, 1x PCIe 12V-2x6 650 mm, 3x PCIe 6+2 pin 600 mm, 3x SATA 450 mm then 120 mm then 120 mm, 1x PATA 450 mm then 120 mm then 120 mm. The box counts cables. The review photo of the cables and the Cybenetics table show that two of the three PCIe 6+2 cables carry two plugs each, so the unit has 5 PCIe 8-pin plugs on 3 cables. ASRock-derived spec lists print 3 for PCIe 6+2 pin connectors, which counts the cables. SATA is 9 plugs on 3 cables and the Molex row is 3 plugs on 1 cable, as in the ASRock spec list. Cybenetics prints 16-24AWG for the 12V-2x6 cable. That range includes the thin sideband wires, so the 16AWG power wire gauge is stored.4Reviewfunkykit.com/reviews/power-supplies/asrock-steel-legend-sl-850g-850w-power-supply-reviewRead 14 October 2026Page 3 lists 1 ATX 24-pin, 2 CPU 8-pin (4+4), 3 PCIe 8-pin (6+2) cables, 1 12VHPWR (12V-2x6) cable rated up to 600W, 3 SATA cables and 1 PATA cable. Cable counts match the Cybenetics table.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Cables and Connectors table: ATX 600 mm 18AWG, EPS 4+4 640 mm 18AWG (2 cables), 6+2 PCIe 590 mm plus 140 mm on two cables with two plugs each plus one single 590 mm cable (5 plugs, all 18AWG), 12+4 pin PCIe 645 mm (600W) 16-24AWG, SATA 450 mm then 120 mm then 120 mm on 3 cables (9 plugs), 4-pin Molex 440 mm then 110 mm then 110 mm on 1 cable (3 plugs). The stored lengths are the maker's lengths from the retail box. Cybenetics measured slightly shorter cables. The 16-24AWG range includes the thin sideband wires.

BCooler Master V850 SFX Gold ATX 3.1

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	300	18AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	450	18AWG	Not available
PCIe 8-pin (6+2)	4	2	400	16AWG	Not available
12V-2x6	1	1	400	16AWG	600
SATA power	8	2	100	18AWG	Not available
4-pin Molex	4	1	100	18AWG	Not available

Source1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: ATX 24 pin 1, EPS 4+4 pin 1, EPS 8 pin 1, SATA 8, Peripheral 4 pin 4, PCI-e 6+2 pin 4 and 12V-2x6 1. The product sheet gives the cable counts and lengths.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Connectors: ATX 24 pin x1 = 1x (300mm), EPS 4+4 pin x1 = 1x (450mm), EPS 8 pin x1 = 1x (450mm), SATA x8 = 2x (100+115+115+115mm), Peripheral 4 pin x4 = 1x (100+115+115+115mm), PCI-e 6+2 pin x4 = 2x (400+120mm) and 12V-2x6 x1 = 1x (400mm). The first value of each spacing list is the length to the first plug. The 4-pin peripheral plugs are Molex plugs. The overview text says 16AWG PCIe high-efficiency cables, so 16AWG is stored for the PCIe cables. The 12V-2x6 rating of 600W comes from Cybenetics. The other gauges come from Cybenetics.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Cables and Connectors table: ATX 20+4 pin 300 mm 18AWG, 8 pin EPS 455 mm 18AWG, 4+4 pin EPS 455 mm 18AWG, 2 PCIe cables with 4 plugs in total (400 mm + 120 mm) 16-18AWG, 12+4 pin PCIe 415 mm (600W) 16-28AWG, 2 SATA cables with 8 plugs in total 18AWG and 1 Molex cable with 4 plugs 18AWG, no in-cable capacitors. The 16-28AWG range of the 12+4 pin cable includes the sideband wires, so the 16AWG power wire gauge is stored. The maker's lengths are stored.

CPU (EPS) connectorsi8-pin or 4+4-pin CPU power plugs.

2=CalculatedFrom Cables

2=CalculatedFrom Cables

PCIe 8-pin connectorsi8-pin or 6+2-pin GPU power plugs. Counts the plugs in the box. Some cables share one PSU socket, which the source note says.

5=CalculatedFrom Cables

4=CalculatedFrom Cables

16-pin GPU connectorsiNative 16-pin GPU power plugs: 12V-2x6, 12VHPWR and 16-pin cables of unstated revision. Adapters are not counted. Counts the plugs in the box. Some cables share one PSU socket, which the source note says.

1=CalculatedFrom Cables

1=CalculatedFrom Cables

SATA power connectors

9=CalculatedFrom Cables

8=CalculatedFrom Cables

4-pin Molex connectors

3=CalculatedFrom Cables

4=CalculatedFrom Cables

Cable styleiHow the modular cables are made. Mixed means some cables are sleeved and others flat, such as a sleeved 24-pin cable with flat other cables. From the maker page or a review photo page.

Flat2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 2: ASRock are using thin ribbon style cables.4Reviewfunkykit.com/reviews/power-supplies/asrock-steel-legend-sl-850g-850w-power-supply-reviewRead 14 October 2026Page 1: a full set of flat modular cables.

Mixed1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026The gallery photo cable02.png shows flat ribbon cables for the 24-pin, CPU, PCIe, peripheral and SATA cables and a sleeved 12V-2x6 cable.

Fan

2 of 4 differ

Fan sizeiFrame size of the cooling fan, such as 120, 135 or 140.

135mm2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 4: 135 mm fan, model S1352512EH-3M.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Parts Description: RL4Z S1352512EH-3M, 135 mm, 12V, 0.50A.

92mm1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Fan Size 92mm.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 20267Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026DUT Information: 92mm fan.

Fan bearingiUse the maker's bearing name. FDB and S-FDB are fluid dynamic. HDB is hydrodynamic. Noctua SSO and SSO2 are SSO. Corsair Magnetic Dome is magnetic dome. A brand bearing name that fits no option is Other.

Fluid dynamic (FDB)2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 4: high grade fluid dynamic bearing (FDB) fan.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Parts Description: Fluid Dynamic Bearing Fan.

Fluid dynamic (FDB)1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Fan Bearing FDB. Overview: quiet FDB fan.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Quiet FDB fan: a fluid dynamic bearing fan.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026DUT Information: 92mm Fluid Dynamic Bearing Fan (HA9215VH12FD-F00).

Fan modeiSemi-passive means the fan stops at low load, often sold as zero RPM, hybrid or 0 dB mode. Fanless means the unit has no fan.

Semi-passive2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 3: the iCool switch switches the fan off in lower demand situations, like the semi passive switches of other brands. Page 6: the fan remains off until higher loads are demanded.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026DUT Information: Semi-Passive Operation checked (selectable). The fan reads 0 rpm up to 40% load at both voltages.

Semi-passive7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026DUT Information: Semi-Passive Operation ticked. The maker documents do not mention a semi-passive mode. In the typical load test at 40 C intake the fan already runs at 1302 rpm at 10% load.

Fan mode switchiA button, switch or software setting lets the user turn the semi-passive mode off so the fan always spins. A unit without a semi-passive mode, whose fan the maker says always spins, has no switch, so it is false.

Yes2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 3: a switch labelled iCool on the power side of the unit.5Owner's manualmanua.ls/asrock/steel-legend-sl-850g/manualRead 14 October 2026Quick Installation Guide step 8: if the iCOOL mode is set to ON, the fan will not spin during low to medium loads. The PDF is hosted on manua.ls.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026DUT Information: Semi-Passive Operation (selectable).

Not available

Protection and parts

0 of 3 differ

ProtectionsiProtections the maker lists, or a retailer spec table copies from the maker, plus protections the Cybenetics protection tests show working (UVP, NLO, SIP). The Cybenetics manufacturer list has no OVP or UVP row, so do not build the list from it alone. A protection that is not listed may still exist. No-load covers no-load operation and no-load protection. Fan failure is a maker's fan failure protection or fan safeguard, also when the Cybenetics manufacturer block lists it.

Over-current (OCP), Over-voltage (OVP), Under-voltage (UVP), Over-power (OPP), Over-temperature (OTP), Short-circuit (SCP), No-load (NLO), Surge and inrush (SIP)2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 4: SCP, OPP, OCP, OTP, OVP and UVP protections. The retail box lists OPP/OVP/UVP/SCP/OCP/OTP.7Measurementcybenetics.com/evaluations/psus/2548Read 14 October 2026Protection Features (Manufacturer) lists OPP, OCP (+12V), OTP, SCP, surge protection and inrush current protection. Fan failure protection is not ticked. The protection tests tick NLO and show SIP: surge MOV, inrush NTC and bypass relay.

Over-current (OCP), Over-voltage (OVP), Under-voltage (UVP), Over-power (OPP), Over-temperature (OTP), Short-circuit (SCP), No-load (NLO), Surge and inrush (SIP)1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: OPP / OVP / OTP / OCP / SCP / UVP / Surge & Inrush Protection. Surge and inrush protection is stored as SIP. NLO comes from the Cybenetics protection tests.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Protections: OVP / OPP / SCP / OCP / UVP / OTP / Surge and Inrush Protection.7Measurementcybenetics.com/evaluations/psus/2598Read 15 October 2026Protection Features: OPP at 133.25% normal and 119.18% hot, +12V OCP, OTP, SCP to earth, NLO ticked and SIP shown (surge MOV, inrush NTC and bypass relay). Fan failure protection is not present.

All-Japanese capacitorsiThe maker states that every electrolytic capacitor is from a Japanese maker. A Japanese bulk capacitor alone is not enough. A spec row such as "Japanese capacitors" that names no exception counts.

Yes2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Retail box feature list: 100% Highly Reliable Japanese Capacitors. Page 4: Japanese capacitors throughout the design.

Yes1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Overview: 100% Japanese capacitors.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026High-quality Japanese capacitors feature reduced ripple noise and enhanced reliability.

MTBF (claimed)iThe maker's mean time between failures, such as 100000. An MTTF figure for the whole unit counts too. An MTTF for the fan alone does not. The test temperature goes in the source note.

100,000h3Retailer pageinside-tech.co.uk/power-supplies-2/asrock-steel-legend-sl-850g-850w-atx-power-supply-unit-80-plus-gold-certified-120mm-silent-cooling-fan-high-efficiency-psuRead 14 October 2026Spec table row MTBF (Hours)@25C: 100,000. The listing copies ASRock's table, so the 25 C test temperature is the maker's. Paradigit lists the same 100000 hours.

100,000h1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: MTBF >100,000 Hours. Stored as 100000. The test temperature is not stated.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026MTBF >100,000 hours.

Monitoring and lighting

None of 4 known

Software monitoringiThe unit reports power, temperature or fan data to PC software over a USB or internal connection.

Not available

Not available

SoftwareiThe maker's software for monitoring or control.

Not available

Not available

Built-in power displayiA screen on the unit that shows live power draw or other readings.

Not available

Not available

RGB lighting

Not available

Not available

Dimensions and weight

2 of 2 differ

DimensionsiBody without cables. Width and height are the back face with the AC inlet. Depth is the length into the case, which decides case fit.

Width150Height86Depth150mm(5.9 × 3.4 × 5.9 in)2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Page 3: 150 mm x 150 mm x 86 mm (L x W x H). Depth 150, width 150, height 86.

Width125Height63.5Depth100mm(4.9 × 2.5 × 3.9 in)1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Specifications: Dimensions (L x W x H) 100 x 125 x 63.5 mm. Depth is 100 mm.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Dimensions (L x W x H) 100 x 125 x 63.5mm.

WeightiWeight of the unit alone. Use the Hardware Busters figure on hwbusters.com when the maker states none, not a copy on another site. Maker weights that include cables or the box, such as Corsair's, and retailer packed weights are not stored. A net weight counts unless the maker says it includes the cables.

Not available

1.42kg(3.1 lb)2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Net Weight 1.42 kg. Gross Weight 1.86 kg is the packed weight and is not stored. The sheet does not say the net weight includes cables.

In the box

1 of 1 differ

In the boxiItems supplied with this exact model, verbatim. The AC power cord differs per region.

Power Supply, AC Power Cord, Modular Cables, ATX Bridging Connector Plug, Mounting Screws, Cable Ties, Velcro Straps, Leaflet4Reviewfunkykit.com/reviews/power-supplies/asrock-steel-legend-sl-850g-850w-power-supply-reviewRead 14 October 2026Page 3: power supply, power cord for the wall, modular power cables, ATX bridging connector plug (detection tool), mounting screws, cable ties and velcro straps. KitGuru adds a leaflet.

Cable bag x1, Power cord x1, Zip ties x7, Velcro x3, Screw bag x1, ATX-ITX adapter bracket x1, Manual - User Guide x1, Cable Recommended Installation Guide x12Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Package Content (Accessories): cable bag x1, power cord x1, zip ties x7, velcro x3, screw bag x1, ATX-ITX adapter bracket x1, manual user guide x1 and cable recommended installation guide x1.

Links

Not compared

Product page

www.asrock.com/Power-Supply/SteelLegend/SL-850G1Maker product pageasrock.com/Power-Supply/SteelLegend/SL-850GRead 14 October 2026ASRock's product page answers agents with a bot check, so its text was not read. The link is the page that search results name for the SL-850G. The specs below come from a retailer copy of ASRock's spec table, the photographed retail box, reviews and the Cybenetics report.

www.coolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.html1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026

Spec sheet

Not available

coolermaster.egnyte.com/dl/TcIBNJ2vjs2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 2026Product sheet, English edition, for V SFX Gold 850 ATX 3.1, item code MPY-8501-SFHAGV-3E**.

Manual

Not available

coolermaster.egnyte.com/dl/IkBZMmuw2s3Owner's manualcoolermaster.egnyte.com/dl/IkBZMmuw2sRead 15 October 2026User Guide Ver 1.0 2024/07 for the SFX GOLD 550/650/750/850 models. It covers the series, so it names no ATX version for the 850W.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

0 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

10years2Reviewkitguru.net/components/power-supplies/zardon/asrock-steel-legend-sl-850g-psu-reviewRead 14 October 2026Overview: Global 10 Years Warranty.3Retailer pageinside-tech.co.uk/power-supplies-2/asrock-steel-legend-sl-850g-850w-atx-power-supply-unit-80-plus-gold-certified-120mm-silent-cooling-fan-high-efficiency-psuRead 14 October 2026Spec table: Warranty (Years) 10. The market is not named.

10years1Maker product pagecoolermaster.com/en-global/products/v-sfx-gold-850-atx-3-1.htmlRead 15 October 2026Overview: 10-year Warranty. The page is the global English page. The product sheet says 10 years from the date of purchase.2Maker spec sheet (PDF)coolermaster.egnyte.com/dl/TcIBNJ2vjsRead 15 October 202610 Year Warranty: a standard limited manufacturing warranty of 10 years from the date of purchase.

Both are also in the API. Back to all power supplies.