Power supplies / Compare

ASRock Steel Legend SL-850G vs ASUS ROG Strix 1000W Platinum

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Product A: ASRock

Steel Legend SL-850G

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Product B: ASUS

ROG Strix 1000W Platinum

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Only differences

AASRock Steel Legend SL-850G

BASUS ROG Strix 1000W Platinum

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.

ROG Strix Platinum4Press releasefunkykit.com/news/asus-announces-the-rog-strix-platinum-power-supply-seriesRead 14 October 2026The release calls the lineup the ROG Strix Platinum PSU series.

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.

ROG-STRIX-1000P-GAMING, ROG-STRIX-1000P-GAMING-WHITE3Maker product pagerog.asus.com/ch-de/power-supply-units/rog-strix/rog-strix-1000p-gaming-white/specRead 14 October 2026ROG Strix 1000W Platinum White Edition. The model code ROG-STRIX-1000P-GAMING-WHITE comes from the page address, the 80 PLUS list and retailers.

GTIN / EAN

Not available

Not available

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

Not available

12 September 20244Press releasefunkykit.com/news/asus-announces-the-rog-strix-platinum-power-supply-seriesRead 14 October 2026Press release dated September 12, 2024, as posted by Funky Kit.

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 pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026UK ASUS store page shows a Buy Now button and a price of 209.99 GBP in October 2026.8Reviewkitguru.net/components/power-supplies/zardon/asus-rog-strix-1000w-platinum-atx-v3-1-psu-reviewRead 14 October 2026Review of September 11, 2025 says the unit is on sale in the UK for about 240 GBP and calls it a popular unit on sale for some time.

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, White3Maker product pagerog.asus.com/ch-de/power-supply-units/rog-strix/rog-strix-1000p-gaming-white/specRead 14 October 2026The White Edition is a second colour of the same unit. Its Tech Specs match the black unit: same power table, cables, dimensions, weight, MTBF and fan button. The UK page for the white edition shows a monitor spec table by mistake, so the Swiss page was read.

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.

ATX5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026DUT Information: Type ATX12V. The body is 150 x 86 mm at the back, the ATX size.

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 pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: ATX Standard ATX 3.1. Intel Form Factor row says ATX12V.

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 5.12Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gamingRead 14 October 2026Features: PCIe 5.1 Ready with a native 12V-2x6 connector. A PCI-E Gen 5.1 16-pin cable is in the box.

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 modular5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026DUT Information: Cable Design Fully Modular.7Reviewhwbusters.com/psus/asus-rog-strix-1000w-platinum-psu-reviewRead 14 October 2026Technical Specifications: Modular Design Yes (Fully).

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.

Great Wall5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026DUT Information and Parts Description: OEM/ODM Great Wall.7Reviewhwbusters.com/psus/asus-rog-strix-1000w-platinum-psu-reviewRead 14 October 2026Technical Specifications: Manufacturer (OEM) Great Wall.

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.

1,000W1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: Total Output 1000W.

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.

Not available

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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 rail5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Power Specifications table lists one +12V column, 83.3A.7Reviewhwbusters.com/psus/asus-rog-strix-1000w-platinum-psu-reviewRead 14 October 2026Technical Specifications: Number of 12V rails 1.

+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.

83.3A1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs maximum load: +3.3V 25A, +5V 25A, +12V 83.3A, -12V 0.3A, +5Vsb 3A.

+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.

1,000W1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs combined load: +12V 1000W.

+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.

130W1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs combined load: 130W for the +3.3V and +5V rails.

+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.

3A1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs maximum load: +5Vsb 3A, 15W.

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 pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: AC Input Range 100-240Vac.

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.

Yes5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked. ATX v3.1 PSU Power Excursion is also checked.7Reviewhwbusters.com/psus/asus-rog-strix-1000w-platinum-psu-reviewRead 14 October 2026Technical Specifications: Alternative Low Power Mode support Yes.

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 Platinum1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: 80Plus Platinum. The 80 PLUS list agrees.6Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/ASUS_ROG-STRIX-1000P-GAMING_1000W_SOCE%207344_Report.pdfRead 14 October 202680 PLUS list entry ID 13535, model ROG-STRIX-1000P-GAMING, 1000W, 80 PLUS Platinum, tested 3/27/24 at 115V nominal and 60 Hz (typical efficiency at 50% load 92.72%). The White Edition has its own Platinum entry, ID 14428.

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 Platinum3Maker product pagerog.asus.com/ch-de/power-supply-units/rog-strix/rog-strix-1000p-gaming-white/specRead 14 October 2026Tech Specs: Cybenetics Efficiency Platinum (230V) and Platinum (115V). The black page shows no Cybenetics efficiency row.5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Report 25PS2759A, certification ID 252759, sample received Dec 2, 2024, tested Mar 5, 2025, issued Mar 7, 2025. ETA Platinum at 115V (badge image). The sample has an Everflow fan.

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 Platinum3Maker product pagerog.asus.com/ch-de/power-supply-units/rog-strix/rog-strix-1000p-gaming-white/specRead 14 October 2026Tech Specs: Cybenetics Efficiency Platinum (230V) and Platinum (115V).5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026ETA Platinum at 230V (badge image).

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+1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: Cybenetics Noise Level Certification A+, no voltage named. The Cybenetics report shows A+ at both voltages.5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026LAMBDA A+ at 115V (badge image).

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+1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: Cybenetics Noise Level Certification A+, no voltage named. The Cybenetics report shows A+ at both voltages.5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026LAMBDA A+ at 230V (badge image). The measured average at 230V is 18.04 dBA. HWBusters' August 2024 review sample had a Champion CF1325L12D fan and was rated A++ at 230V, so the fan change moved the 230V level.

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.

90.363%5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Average over more than 1450 load combinations at 115V. Ambient 28-32 C. Everflow fan sample. HWBusters, with the earlier Champion fan sample, printed the same Platinum levels.

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.

92.158%5Measurementcybenetics.com/evaluations/psus/2759Read 14 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%.

75.875%5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Efficiency at 2% load at 115V. The unit is above 500 W, so the 2% load applies. At 230V it is 71.174%.

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.

0.995Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Average over more than 1450 load combinations at 115V. At 230V it is 0.963.

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.

18.09dB(A)5Measurementcybenetics.com/evaluations/psus/2759Read 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 18.04 dBA.

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.

33.2dB(A)5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Typical load tests at 115V, 100% load row: 33.2 dB(A) at 1100 rpm fan speed, ambient about 30 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.

0.073W5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Standby power consumption at 115V with no load on +5VSB. At 230V it is 0.1467 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.

22.2ms5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 22.2 ms, AC loss to PWR_OK 19.1 ms, at maximum continuous load. Report 2759.

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.

18.77mV5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Non-accredited. 12V ripple at full load at 115V. At 230V it is 18.87 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%.

0.41%5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Non-accredited. 12V load regulation at 115V. At 230V it is 0.48%.

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.

BASUS ROG Strix 1000W Platinum

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	610	18AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	1,000	18AWG	Not available
PCIe 8-pin (6+2)	4	4	750	18AWG	Not available
12V-2x6	1	1	750	16AWG	600
SATA power	6	2	400	18AWG	Not available
4-pin Molex	3	1	400	18AWG	Not available

Source1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Package Contents: motherboard cable x1 (610mm), CPU cable x2 (1000mm), PCI-E Gen 5.1 16-pin-to-16-pin cable x1 (750mm), PCI-E 8-pin-to-6+2pin cable x4 (750mm), SATA 1-to-3 cable x2 (400+120+120mm), peripheral 1-to-3 cable x1 (400+150+150mm). Cable Connectors row: 24/20-pin x1, CPU 4+4-pin x2, 16-pin x1, 6+2-pin x4, SATA x6, peripheral x3. Lengths are the maker's. Gauge and the 600W rating of the 16-pin cable come from Cybenetics.5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Cables and Connectors table: ATX 610 mm 18AWG, EPS 4+4 1000 mm 18AWG (2 cables), 6+2 PCIe 750 mm 18AWG (4 cables), 12+4 pin PCIe 745 mm (600W) 16-24AWG, SATA 400 mm then 115 mm then 115 mm and 400 mm then 120 mm then 120 mm (2 cables, 6 plugs), 4 pin Molex 400 mm then 150 mm then 150 mm (1 cable, 3 plugs). The 16-24AWG range includes the thin sideband wires, so the 16AWG power wire gauge is 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

6=CalculatedFrom Cables

4-pin Molex connectors

3=CalculatedFrom Cables

3=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.

Sleeved8Reviewkitguru.net/components/power-supplies/zardon/asus-rog-strix-1000w-platinum-atx-v3-1-psu-reviewRead 14 October 2026Page 2: individually sleeved cables, soft and flexible. The photo shows every wire sleeved.

Fan

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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.

135mm5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Parts Description: Everflow F1214025BL, 135 mm, 12V, 0.2A.

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.

Dual ball2Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gamingRead 14 October 2026Features: dual ball fan bearings with a lifespan of 80,000 hours.5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026Parts Description: Double Ball Bearing Fan.

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-passive1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Features: the PWM-controlled fan shuts off entirely when the PSU load is 40% or below.5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026DUT Information: Semi-Passive Operation checked (selectable). The fan reads 0 rpm up to 40% 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).

Yes1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: 0dB Fan Button. When the button is ON, the fan only spins up at a certain load. When it is OFF, the fan spins continuously at all load levels.5Measurementcybenetics.com/evaluations/psus/2759Read 14 October 2026DUT Information: Semi-Passive Operation (selectable).

Protection and parts

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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 pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: OPP/OVP/UVP/SCP/OCP/OTP. NLO and SIP come from the Cybenetics protection tests.5Measurementcybenetics.com/evaluations/psus/2759Read 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.

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.

Not available

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.

120,000h1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: MTBF >120,000 hrs @ 25C. Published as greater than 120000, so 120000 is the lower bound.

Monitoring and lighting

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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

No1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: AURA SYNC No. The feature list has no lighting.

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.

Width150Height86Depth160mm(5.9 × 3.4 × 6.3 in)1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: 160 x 150 x 86 mm. Reviews read it as 150 wide, 85 or 86 high and 160 deep.

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

1.81kg(4 lb)1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Tech Specs: 1.81 kg (single PSU). HWBusters prints 1.85 kg. The maker figure is stored.8Reviewkitguru.net/components/power-supplies/zardon/asus-rog-strix-1000w-platinum-atx-v3-1-psu-reviewRead 14 October 2026Page 3: weighs 1.81 kg, the same as ASUS's figure. The review sample had an Everflow F1214025BL fan.

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.

Power Cord x 1, ROG Strix DIY sticker x 1, User Manual x 11Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Package Contents: power cord x1, ROG Strix DIY sticker x1, user manual x1, plus the cables stored in the cables field.

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.

rog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming1Maker product pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026

Spec sheet

Not available

Not available

Manual

Not available

Not available

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

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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 pagerog.asus.com/uk/power-supply-units/rog-strix/rog-strix-1000p-gaming/specRead 14 October 2026Features: 10-year warranty included. UK page, the ASUS announcement also says 10-year.

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