Power supplies / Compare

ASRock PRO-850G vs NZXT C850 SFX Gold

A

Product A: ASRock

PRO-850G

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B

Product B: NZXT

C850 SFX Gold

55 of 66 known

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Only differences

AASRock PRO-850G

BNZXT C850 SFX Gold

General

5 of 12 differ

Series

PRO2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Listed under ASRock Power Supply, PRO series.

C Series1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026The page is in the Power Supplies group of the NZXT store, headed C850 SFX Gold. NZXT also sells the larger C850 Gold ATX 3.1 and C850 Gold Core, which are different products.

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

PRO-850G, 90-UXR085-GNUAA2, 90-UXR085-GNEAA26Retailer pageamazon.com/dp/B0FSTHTLZTRead 14 October 2026Amazon US lists model number 90-UXR085-GNUAA2 and manufacturer part PRO-850G. Paradigit and Grosbill list 90-UXR085-GNEAA2 for the EU unit.7Retailer pageparadigit.ie/asrock-pro-850g-850-w/21845961/productRead 14 October 2026Product number manufacturer 90-UXR085-GNEAA2.

PS-8G1BB-US, PS-8G1BB-EU, PS-8G1BB-UK, PS-8G1BB-JP1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Model Number row: PS-8G1BB-US / PS-8G1BB-EU / PS-8G1BB-UK / PS-8G1BB-JP. The Shopify product data lists the US SKU PS-8G1BB-US at $199.99.

GTIN / EAN

47115814914418Retailer pageshop.post.ch/en/electronics/pc-components/power-supply-units/asrock-power-supply-pro-series-pro-850g-850-w/p/878897Read 14 October 2026EAN 4711581491441 for PRO-850G. Grosbill lists the same EAN with reference 90-UXR085-GNEAA2.9Retailer pagegrosbill.com/asrock-atx-850w-169624Read 14 October 2026EAN 4711581491441, manufacturer reference 90-UXR085-GNEAA2. Grosbill ticks ATX 3.0 and calls the cables non-modular. The maker says ATX 3.1, which is stored.

810074847414, 810074847421, 810074847407, 8100748474381Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026UPC row: 810074847414 (US) / 810074847421 (EU) / 810074847407 (UK) / 810074847438 (JP). NZXT also lists an EAN per model, which is not stored.

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

Not available

February 20267Press articleithome.com/0/922/379.htmRead 15 October 2026IT Home article dated 2026-02-18 reports NZXT unveiling the C850 SFX Gold with its H2 Flow case. It gives an Asia-Pacific MSRP of 159.99 USD, which is not stored.

Status

Available2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Archive copy of the ASRock page from 2025-09-19 (the model is listed). Retailers sell the unit in October 2026.

Available1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026The page sells the product at $199.99 in black. Not stored as a launch price.

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

Black7Retailer pageparadigit.ie/asrock-pro-850g-850-w/21845961/productRead 14 October 2026Colour of product: Black.

Black1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Color option Black.

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.

ATX6Retailer pageamazon.com/dp/B0FSTHTLZTRead 14 October 2026Product details: Form Factor ATX. The 150 x 86 mm back face is the ATX size.

SFX1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Form Factor SFX. Dimensions 125 x 63.5 x 100 mm.

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 3.12Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: ATX 12V Version ATX 3.1. Headline: ATX3.1 & PCIe5.1 Ready.

ATX 3.11Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: ATX Version 3.1, Compliance Standard ATX12V v3.1 / EPS12V v2.92.

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 5.12Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Headline: ATX3.1 & PCIe5.1 Ready. Connector row: PCIe5.1 connectors (12+4pin) Dual Color.

PCIe 5.11Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Overview: With ATX 3.1 and PCIe 5.1 support, power is prepared for today and the future. FAQ: ATX 3.1 and PCIe 5.1 compliant.

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

None6Retailer pageamazon.com/dp/B0FSTHTLZTRead 14 October 2026Product details: Power Supply Design Non-Modular. Customer reviews also say all cables are permanently attached.7Retailer pageparadigit.ie/asrock-pro-850g-850-w/21845961/productRead 14 October 2026Headline and specification: Non Modular. Inside Tech's listing says Modular: Fully, but its own table lists the same fixed counts as ASRock (one 24-pin, one EPS, two PCIe 6+2, four SATA) and the fully modular unit is the separate PRO-M850G. Amazon, Post.ch, Grosbill and Geektopia say non-modular, so none is stored as modular.8Retailer pageshop.post.ch/en/electronics/pc-components/power-supply-units/asrock-power-supply-pro-series-pro-850g-850-w/p/878897Read 14 October 2026Cable harness: Fixed.10Spec databasegeektopia.es/es/product/asrock/pro-850gRead 14 October 2026Modular: no. Geektopia gives a presentation date of April 17, 2026, which is later than the ASRock page archived in September 2025, so it is not used for the release month.

Fully modular1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Modular Fully modular.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026DUT Information, Manufacturer-Provided Information: Cable Design Fully Modular.

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.

Not available

Channel Well Technology (CWT)3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026DUT Information and Parts Description: OEM/ODM CWT. Igor's Lab names Channel Well Technology (CWT). Club386 says HEC, which the Cybenetics parts list does not support.6Reviewigorslab.de/en/nzxt-c850-sfx-gold-power-supply-review-sufficient-power-for-small-cases-with-platinum-coatingRead 15 October 2026Review dated May 4, 2026: OEM Channel Well Technology (CWT). The model line says Cybenetics DUT PS-2402, EU SKU PS-8G1B-EU.

Power

5 of 9 differ

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

850W2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Model name PRO-850G and the 80 PLUS certificate state 850 W.5Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/ASRock_PRO-850G_850W_SOCE%207106.7_Report.pdfRead 14 October 2026Rated output power 850 W.

850W1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Wattage 850 W.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 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.

Not available

50°C3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026DUT Information, Manufacturer-Provided Information: Operating Temperature (Continuous Full Load) 0 - 50 °C. Cybenetics marks it as manufacturer-provided, so 50 °C is stored. Club386 also says 850W continuous at up to 50°C ambient.5Reviewclub386.com/nzxt-c850-sfx-gold-reviewRead 15 October 2026Specs and features: 850W continuous at up to 50°C ambient. Detailed inspection: NZXT rates it at the full 850W at an ambient temperature of up to 50°C.

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.

Not available

Single rail3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Power Specifications lists one +12V rail at 70.83 A. The 12V OCP test tripped at 89.40 A (126.22 percent of 70.83 A) at 29 °C, so one over-current limit covers the full rated +12V current. Club386 calls it a single 12V rail.5Reviewclub386.com/nzxt-c850-sfx-gold-reviewRead 15 October 2026Specs and features: single 12V rail rated at 70.83A (850W).

+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.

70.8A2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: Continuous 12V output 70.8 A. ASRock publishes no +3.3V, +5V or +5VSB table for this model.7Retailer pageparadigit.ie/asrock-pro-850g-850-w/21845961/productRead 14 October 2026Energy management: Max output current (+12V) 70.8 A. The same table lists +3.3V and +5V at 100 W each, which is not the combined limit and is not stored.

70.83A1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026DC Output Rating: +12 V 70.83 A (850 W).2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

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

850W7Retailer pageparadigit.ie/asrock-pro-850g-850-w/21845961/productRead 14 October 2026Energy management: Combined power (+12V) 850 W.

850W1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026DC Output Rating: +12 V 70.83 A (850 W).2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

+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.

Not available

100W1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026DC Output Rating: +3.3 V and +5 V 20 A (100 W), printed as one limit for both rails.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

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

3A7Retailer pageparadigit.ie/asrock-pro-850g-850-w/21845961/productRead 14 October 2026Energy management: Max output current (+5Vsb) 3 A.

3A1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026DC Output Rating: 5VSB 3 A (15 W).2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

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

Lowest100Highest240V2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: AC Input 100-240V~, 50-60Hz, 12-6A.

Lowest100Highest240V1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026AC Input Rating: 100 - 240 Vac, 10 - 5 A, 50 - 60 Hz.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

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

Not available

Yes3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked.

Certifications

5 of 5 differ

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 Gold2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Headline: 80 PLUS GOLD Certified.5Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/ASRock_PRO-850G_850W_SOCE%207106.7_Report.pdfRead 14 October 202680 PLUS certificate ID 7106.7 for model PRO-850G: Gold at 115 V, rated 850 W, type ATX12V, test date 2023-07-27, average efficiency 87.69% and 91.47% at 50% load. The test date is older than the ATX 3.1 standard, so ASRock may have kept the certificate for the ATX 3.1 revision. The ASRock page and all retailers state Gold.

80 PLUS Platinum4Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/NZXT_PS-2402_850W_SOCE%207944_Report.pdfRead 15 October 202680 PLUS ID 7944, model PS-2402, type ATX 3.1, 850W, test date 2025-08-27: Platinum at 115V, 91.09% at 20%, 92.14% at 50% and 89.20% at 100% load. These match NZXT's 91.1, 92.1 and 89.2 percent, and Igor's Lab names PS-2402 as the Cybenetics DUT of the C850 SFX Gold. NZXT's page says 80 PLUS Gold. The list level is stored.

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

Not available

Cybenetics Platinum1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Cybenetics Efficiency Platinum, with no input voltage. The Cybenetics report shows Platinum at both voltages.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Report 25PS2904A, certification ID 252904, issued Aug 20, 2025. ETA Platinum at 115V (Cybenetics database feed, id 2904).

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.

Not available

Cybenetics Platinum1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Cybenetics Efficiency Platinum, with no input voltage. The Cybenetics report shows Platinum at both voltages.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026ETA Platinum at 230V (Cybenetics database feed, id 2904).

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

Not available

A-1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Cybenetics Noise A-, with no input voltage. The Cybenetics report shows A- at both voltages.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026LAMBDA A- at 115V (Cybenetics database feed, id 2904).

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

Not available

A-1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Cybenetics Noise A-, with no input voltage. The Cybenetics report shows A- at both voltages.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026LAMBDA A- at 230V (Cybenetics database feed, id 2904).

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.

Not available

89.887%3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Average over more than 1450 load combinations at 115V. Received Jul 10, 2025, tested Aug 16, 2025, no serial number printed. Ambient 28-32 C.

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

Not available

91.826%3Measurementcybenetics.com/evaluations/psus/2904Read 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.

Not available

74.457%3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Efficiency at 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.

Not available

0.9893Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Average over more than 1450 load combinations at 115V.

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.

Not available

25.29dB(A)3Measurementcybenetics.com/evaluations/psus/2904Read 15 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 25.39 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.

Not available

44.5dB(A)3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Typical load tests at 115V, 100% load row: 44.5 dB(A) at 2739 rpm fan speed, intake 45.98 C. At 230V it is 44.0 dB(A) at 2642 rpm.

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.

Not available

0.0299W3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Standby power consumption at 115V with no load on +5VSB: 0.0299 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.

Not available

19.9ms3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 19.9 ms, AC loss to PWR_OK 16.8 ms, PWR_OK inactive to DC loss 3.1 ms, at maximum continuous load. The report names no input voltage.

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

Not available

29.46mV3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Non-accredited measurement. 12V ripple at full load at 115V. At 230V it is 30.05 mV.

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

Not available

0.29%3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Non-accredited measurement. 12V load regulation at 115V. At 230V it is 0.35%.

Cables and connectors

5 of 7 differ

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 PRO-850G

Connector	Connectors	Cables	Length to first plug (mm)
ATX 24-pin (20+4)	1	1	600
CPU 8-pin (EPS, 4+4)	1	1	650
PCIe 8-pin (6+2)	2	2	600
12V-2x6	1	1	600
SATA power	4	2	450
4-pin Molex	2	1	450

Source2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification connector rows: 24-pin 1, EPS 4+4 pin 1, PCIe 5.1 12+4 pin dual color 1, PCIe 6+2 pin 2, 4-pin peripheral 2, SATA 4. The lengths and cable counts come from the cable drawing on the Amazon listing. The page gives no cable lengths or wire gauge. 12V-2x6 power rating is not stated for this model.6Retailer pageamazon.com/dp/B0FSTHTLZTRead 14 October 2026Listing image 4, a drawing published with the product: MB 24 pin 1x 600 mm, CPU 4+4 pin 1x 650 mm, PCIe 12V-2x6 1x 600 mm, PCIe 6+2 pin 2x 600 mm, one SATA cable with 3 SATA plugs and one PATA cable with 2 PATA plugs and 1 SATA plug, both 450 mm to the first plug and 120 mm between plugs. Totals match the ASRock page: 4 SATA and 2 peripheral plugs. The two PCIe 6+2 pin plugs are drawn as two separate cables. The same listing gallery also shows the PRO-850B, PRO-650B and PRO-750G, so only this drawing, which matches the ASRock counts, is used.

BNZXT C850 SFX Gold

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	350	16AWG	Not available
CPU 8-pin (EPS, 4+4)	1	1	470	16AWG	Not available
PCIe 8-pin (6+2)	3	2	470	16-18AWG	Not available
12V-2x6	1	1	470	Not available	600
SATA power	6	2	100	18AWG	Not available
4-pin Molex	3	1	100	18AWG	Not available

Source1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Cable Length & Connector Quantity: 24-pin ATX 350 mm (1), 4+4-pin CPU 470 mm (1), 6+2-pin PCIe 470 mm (1), 16-pin (PSU) to dual 8-pin (6+2) PCIe 470 mm (2), 16-pin (12+4) 12V-2x6 PCIe 470 mm (1), SATA 100 + 100 mm (6), peripherals 100 + 100 mm (3). Inside the Box lists one dual 8-pin cable, one single 6+2-pin cable, two SATA cables and one peripherals cable. The dual 8-pin cable has a 16-pin plug at the PSU end, so it counts as PCIe 8-pin with 2 plugs. The manual lists the 12V-2x6 cable as option 1 and the 6+2-pin or dual 8-pin cable as option 2, and the dual 8-pin cable plugs into the 12V-2x6 socket on the PSU. The lengths are the maker's. Wire gauges and the 600 W rating of the 12V-2x6 cable come from Cybenetics and the overview text (a 600W 12V-2x6 connector). Cybenetics lists 475 mm and 105 mm for the same cables. It counts the dual 8-pin cable as 2 cables, which is not used. The 12V-2x6 gauge is a 16-24AWG range that includes sideband wires, so none is stored.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026Component list: 24-pin ATX x1, 4+4-pin CPU x1, 6+2-pin PCIe x1, 16-pin (PSU) to dual 8-pin (6+2) PCIe x1, 16-pin (12+4) 12V-2x6 PCIe x1, SATA x2, peripherals x1. Specification page 15: lengths 350, 470, 470, 470 and 470 mm, SATA 100 + 100 + 100 mm (6 connectors) and peripherals 100 + 100 + 100 mm (3 connectors). The panel on page 5 has MOTHERBOARD 20+4, PERIPHERAL & SATA, CPU & PCI-E and 12V-2x6 sockets. Step 4 lists the 12V-2x6 cable as option 1 and the 6+2-pin or dual 8-pin cable as option 2.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Cables and Connectors table: ATX 24 pin 16AWG, 4+4 pin ATX12V 16AWG, 2x 6+2 pin PCIe (2 cables, 4 connectors) and 6+2 pin PCIe both 16-18AWG, 12+4 pin PCIe (600W) 16-24AWG, SATA 18AWG (2 cables, 6 connectors), 4-pin Molex 18AWG (1 cable, 3 connectors). The 600 W rating is for the 12V-2x6 cable.

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

1=CalculatedFrom Cables

1=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.

2=CalculatedFrom Cables

3=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

4=CalculatedFrom Cables

6=CalculatedFrom Cables

4-pin Molex connectors

2=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.

Flat2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: Cable Type Flat.

Embossed or debossed flat1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Cable Type Individually embossed with cable comb.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

Fan

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

120mm2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: Fan 120mm Fan. Headline: Low noise 120mm FAN. The page names no bearing.

92mm1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Fan Specs: Size 92 mm, PWM, 3,500 +/- 10% RPM.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 20263Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Cooling: 92mm Fluid Dynamic Bearing Fan (HA9215SH12FD-F00).

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.

Not available

Fluid dynamic (FDB)1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Fan Specs: Bearing Fluid dynamic bearing.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 20263Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Cooling: Fluid Dynamic 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.

Always on2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: iCOOL MODE No. The quick installation guide says that with iCOOL mode on, the fan does not spin at low to medium load. With iCOOL marked No, the fan spins at all loads.3Owner's manualdownload.asrock.com/Manual/QIG/Power%20Supply%20Series_multiQIG.pdfRead 14 October 2026Step 8: if the iCOOL mode is set to ON, the fan will not spin during low to medium loads.

Semi-passive1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Fan Specs: Zero RPM Fan Mode Yes.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026Fan Spec page 14: Zero RPM Fan Mode Yes.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026DUT Information: Semi-Passive Operation checked.

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.

Not available

No5Reviewclub386.com/nzxt-c850-sfx-gold-reviewRead 15 October 2026Detailed inspection: there is no specific button to toggle semi-passive operation.

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), Short-circuit (SCP), Over-voltage (OVP), Under-voltage (UVP), Over-temperature (OTP), Over-power (OPP)2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: Protections OCP, SCP, OVP, UVP, OTP, OPP.

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 pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Electrical Features: OVP, UVP, SCP, OTP, OPP and OCP. NLO and SIP come from the Cybenetics protection tests.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026Electrical Features page 15: OVP, UVP, SCP, OTP, OPP, OCP.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Protection Features: OCP, OPP, OTP and SCP on all rails, NLO checked, UVP passed at 90 V full load and at 80 V, surge protection by MOV and inrush protection by NTC and bypass relay. Fan failure protection is marked absent.

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.

No2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: Capacitors All Taiwanese. Stored as false.

Yes1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Capacitors All 105°C-rated Japanese. The overview says 100% Japanese capacitors rated to 105°C.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 20263Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026Parts Description: bulk capacitor Rubycon, electrolytic Rubycon and Nippon Chemi-con, polymer Nichicon FPCAP and Nippon Chemi-con. All are Japanese makers, which agrees with NZXT.

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.

100,000h2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: MTBF (Hours)@25°C 100,000.

100,000h1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Operation: MTBF 100,000 hours. The page does not state the test temperature.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026Operation page 15: MTBF 100,000 hours, Temperature 0 - 50°C.

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.

Width150Height86Depth140mm(5.9 × 3.4 × 5.5 in)2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: Dimensions (L x W x H) 140mm x 150mm x 86mm. Depth is 140 mm and the back face is 150 x 86 mm.6Retailer pageamazon.com/dp/B0FSTHTLZTRead 14 October 2026Item dimensions 5.51 x 5.91 x 3.39 inches, which is 140 x 150 x 86 mm.

Width125Height63.5Depth100mm(4.9 × 2.5 × 3.9 in)1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: width 125 mm, height 63.5 mm, depth 100 mm.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

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

0.97kg(2.1 lb)1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Weight 0.97 kg (2.1 lb). Cybenetics measured 0.966 kg. The page does not say whether cables are included.3Measurementcybenetics.com/evaluations/psus/2904Read 15 October 2026DUT Information: Weight 0.966 kg (2.13 lb), the same as the maker's 0.97 kg.

In the box

1 of 1 differ

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

Not available

C850 SFX Gold, AC Power Cord, Installation Accessories1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Inside the Box: C850 SFX Gold, 24-pin ATX, 4+4-pin CPU, 6+2-pin PCIe, 16-pin (PSU) to dual 8-pin (6+2) PCIe, 16-pin (12+4) 12V-2x6, 2x SATA, peripherals cable, AC Power Cord, Installation Accessories. The manual adds 4 #6-32 screws. The AC cord differs per region.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026Component list: power supply, cables, 4 #6-32 screws, AC power cord.

Links

Not compared

Product page

www.asrock.com/Power-Supply/PRO/PRO-850G/index.asp1Maker product pageasrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Maker page for the PRO-850G. ASRock's bot protection returns an empty page to the agent, so no value is taken from the live page. The text was read from the archive copy below.

nzxt.com/products/c850-sfx-gold1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026

Spec sheet

Not available

Not available

Manual

download.asrock.com/Manual/QIG/Power%20Supply%20Series_multiQIG.pdf3Owner's manualdownload.asrock.com/Manual/QIG/Power%20Supply%20Series_multiQIG.pdfRead 14 October 2026Quick Installation Guide, linked from the ASRock PRO-850G page as the manual. It is shared by all ASRock power supply series and names no model values.

cdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdf2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026NZXT PSU C850 SFX Gold Digital Manual, version 6, 2026/2/13.

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

1 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.

3years2Maker product pageweb.archive.org/web/20250919085843/https://asrock.com/Power-Supply/PRO/PRO-850G/index.aspRead 14 October 2026Specification: Warranty (Years) 3. The page is the global ASRock page and names no market.

10years1Maker product pagenzxt.com/products/c850-sfx-goldRead 15 October 2026Tech Specs: Warranty 10 years. The page is the US store.2Owner's manualcdn-g.nzxt.com/dl/PSU_C850_SFX_Gold_Digital_Manual_V6_260213.pdfRead 15 October 2026

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