Just $109 nets you a 1000W power supply from ASRock, knocking almost 1/3 off the price — the Steel Legend SL-1000G has plenty of power to throw at the latest and greatest GPUs

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All the Watts you need for a modern high-power gaming rig

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Modern high-end gaming PCs can have some incredibly powerful and electricity-draining components in them, with GPUs like Nvidia's RTX 5090 recommending at least a 1000W power supply to handle transient spikes and sustained power draw. Today at Newegg, you can find a great deal on a new 1000W power supply from ASRock that will save you a cool $50. Swap out that old PSU, or prepare for a new build with a modern power supply upgrade.

ASRock Steel Legend SL-1000G 1000W PSU
Save 31% ($50)
ASRock Steel Legend SL-1000G 1000W PSU: was $159.99 now $109.99 at Newegg

The ASRock Steel Legend SL-1000G is an 80-Plus Gold and Cybenetics Platinum-certified power supply featuring Japanese capacitors, dual 12V-2x6 connectors, ATX 3.1 and PCIe 5.1 readiness, fully modular cabling, and a 10-year warranty.

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We had the chance to review the ASRock Steel Legend SL-1000G 1000W power supply and gave it a 3.5 stars out of 5 rating. We really liked the remarkable 10-year warranty and build quality of the PSU, with the test unit having exceptional efficiency for its class, tight voltage regulation, and full protection features. Our concerns with this PSU were the noise levels under heavy stress, moderate ripple levels, some signs of thermal stress, and generally a lack of standout features. But, at this price point, it's an exceptional value for a high-wattage power supply with these features.

Swipe to scroll horizontally
Main Output

Load (Watts)

201.97 W

Row 0 - Cell 2

503.27 W

Row 0 - Cell 4

753.53 W

Row 0 - Cell 6

1001.61 W

Row 0 - Cell 8

Load (Percent)

20.2%

Row 1 - Cell 2

50.33%

Row 1 - Cell 4

75.35%

Row 1 - Cell 6

100.16%

Row 1 - Cell 8

Amperes

Volts

Amperes

Volts

Amperes

Volts

Amperes

Volts

3.3 V

1.85

3.38

4.61

3.37

6.92

3.36

9.23

3.36

5 V

1.85

5.05

4.61

5.05

6.92

5.04

9.23

5.03

12 V

15.39

12.11

38.48

12.07

57.71

12.05

76.95

12.01

Swipe to scroll horizontally

Line

Regulation (20% to 100% load)

Voltage Ripple (mV)

Row 0 - Cell 3 Row 0 - Cell 4 Row 0 - Cell 5 Row 0 - Cell 6 Row 0 - Cell 7
Row 1 - Cell 0 Row 1 - Cell 1

20% Load

50% Load

75% Load

100% Load

CL1 12V

CL2 3.3V + 5V

3.3V

0.4%

10

12

14

18

14

18

5V

0.4%

12

12

16

20

16

18

12V

0.8%

18

28

32

54

50

24

The ASRock Steel Legend SL-1000G demonstrated strong electrical performance in terms of voltage regulation and filtering. Voltage regulation was tight across all rails, with deviations of 0.8% on the 12V rail and 0.4% on both the 5V and 3.3V rails, indicating stable output under varying loads. Ripple suppression was effective, with the 12V rail exhibiting a maximum ripple of 54 mV, the 5V rail 20 mV, and the 3.3V rail 18 mV.

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Stewart Bendle
Stewart Bendle
Deals Writer

Stewart Bendle is a deals and coupon writer at Tom's Hardware. A firm believer in “Bang for the buck” Stewart likes to research the best prices and coupon codes for hardware and build PCs that have a great price for performance ratio.

15 Comments Comment from the forums
  • S58_is_the_goat
    Will this also fry your cpu? 😂
    Reply
  • timsSOFTWARE
    If you need a 1K+ watt PSU, you shouldn't try to save money on it - you likely have some combo of very expensive components that you wouldn't want to fry, and something that makes a sigificant contribution to electricity bills where efficiency would pay off.
    Reply
  • pclaughton
    This is Cybenetics Platinum, not Titanium.
    Reply
  • Moxylite
    @S58_is_the_goat "will this also fry your cpu?:)

    Luckily, Asrock doesn't actually make it. It's a Rebrand of some other manufacturer, but they won't exactly say which one.:rolleyes:

    That said, Seasonic or Corsair for me, all day long(y)
    Reply
  • Alvar "Miles" Udell
    Once upon a time TomsHardware would publish the lists of the OEMs of all the popular brands of PSUs, but they haven't updated it in...10 years.
    Reply
  • Amdlova
    S58_is_the_goat said:
    Will this also fry your cpu? 😂
    MSI, Gigabyte and Asrock it's aways guaranteed you will have a nice fireplace. A cheap chinewall or another garbage...
    Reply
  • Amdlova
    Alvar Miles Udell said:
    Once upon a time TomsHardware would publish the lists of the OEMs of all the popular brands of PSUs, but they haven't updated it in...10 years.
    Too much job to dissemble a power supply and test it... Best say "keep your know brand(S*)"

    *Seasonic
    Reply
  • Alvar "Miles" Udell
    Amdlova said:
    Too much job to dissemble a power supply and test it... Best say "keep your know brand(S*)"

    *Seasonic

    No need to do that, all you need to do, in theory, is go by the UL number. To borrow a graphic from their last article below (Yellow = OEMs, orange = design but don't build, grey = rebadge only), if a PSU has a UL number of E104405, for example, it was built by SeaSonic, even if it carries a Corsair badge, though many that either design or just rebadge will use different manufacturers for different specs since there's no need for a top tier OEM like SeaSonic for your Value series models that'll only be used in low end machines.

    In 2025 in the age of AI assistants it's orders of magnitude easier even for the very novice user. For example, asking Copilot about this (in Search mode) brings up the following, which means that this unit is quite likely reliable, especially if you're in the RTX 5070 or even 5080 area where you're going to be hovering around half load peak and something I'd consider recommending if the person wanted something in a "budget performer", though personally SeaSonic is the only thing that's going to grace my system.

    The AsRock SL-1000G power supply, what is its OEM based on its UL number?

    The OEM for the ASRock SL-1000G power supply is likely Channel Well Technology (CWT), based on its UL number E186014.

    Here's the breakdown:

    🔍 UL Number and OEM Identification
    UL Number: E186014

    This UL file number is registered to Channel Well Technology (CWT), a well-known OEM that manufactures power supplies for many brands including Corsair, Thermaltake, and others.



    Does AsRock design this PSU or do they just rebadge an existing unit?

    ASRock does not design the SL-1000G power supply from scratch; it is a rebadged unit manufactured by Channel Well Technology (CWT), a well-established OEM.


    https://cdn.mos.cms.futurecdn.net/5z5s4hwd4jx2qu8cK6WBZW-589-80.png.webp
    Reply
  • Amdlova
    Got one Super flower Gold with semi passive Desing super cheap only uses 1/4 rated power.
    Long time ago only have Seasonic PSU, but in my country they have gold price. And they don't last in stock...
    A used one almost have same price of a brand new PSU.
    Even in Third World Country the people know how good is to get a Seasonic PSU
    Reply
  • thestryker
    Alvar Miles Udell said:
    No need to do that, all you need to do, in theory, is go by the UL number. To borrow a graphic from their last article below (Yellow = OEMs, orange = design but don't build, grey = rebadge only), if a PSU has a UL number of E104405, for example, it was built by SeaSonic, even if it carries a Corsair badge, though many that either design or just rebadge will use different manufacturers for different specs since there's no need for a top tier OEM like SeaSonic for your Value series models that'll only be used in low end machines.

    In 2025 in the age of AI assistants it's orders of magnitude easier even for the very novice user. For example, asking Copilot about this (in Search mode) brings up the following, which means that this unit is quite likely reliable, especially if you're in the RTX 5070 or even 5080 area where you're going to be hovering around half load peak and something I'd consider recommending if the person wanted something in a "budget performer", though personally SeaSonic is the only thing that's going to grace my system.




    https://cdn.mos.cms.futurecdn.net/5z5s4hwd4jx2qu8cK6WBZW-589-80.png.webp
    It seems your search ended up with incorrect information. Any PSU that carries a Cybenetics rating will have an entry on their website of the test which includes the OEM.

    In this case it's HEC: https://www.cybenetics.com/evaluations/psus/2542/
    Reply