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ASRock Steel Legend SL-850G 850W 80 Plus Gold & Cybenetics Platinum Full Modular Power Supply ATX3.1 PCIe5.1 Ready with Dual Color 12V-2x6 Cable 10 Years Warranty 135 mm FDB Fan Japanese Capacitor
ASRock

ASRock Steel Legend SL-850G 850W 80 Plus Gold & Cybenetics Platinum Full Modular Power Supply ATX3.1 PCIe5.1 Ready with Dual Color 12V-2x6 Cable 10 Years Warranty 135 mm FDB Fan Japanese Capacitor

4.4(262 reviews, all variants)
entry$50-$9950+ bought in past month
#22 in Computer Power Supplies
modular
Modular
wattage
850 watts
fan size
135 mm
connector
ATX
compatible
Personal Computer
form factor
ATX
cooling method
Air

Want the best price and purchase timing?

Our AI advisor analyzes real-time pricing across all channels to find you the best deal.

AI Verdict

This 850W 80 Plus Gold, Cybenetics Platinum ATX3.1 PSU with a 10-year warranty is for PC builders needing PCIe5.1 power and quiet operation.

Strong Fit

This 850W ATX3.1 and PCIe5.1 ready power supply, with its 80 Plus Gold and Cybenetics Platinum efficiency, is well-suited for modern gaming systems requiring stable power delivery. The 10-year warranty and 100% Japanese capacitors contribute to long-term reliability.

If 850W is too much, look for the 650W or 750W models in the same Steel Legend series for similar features at lower wattage.

Regret Score™

Very Low Risk

Lower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity

17/100
vs. 1,285 Power & Cooling we've analyzedSafer than 85%
Hidden Defects
13/35

Issues discovered after purchase

Achilles' Heel
0/25

Critically weak dimension

Expectation Gap
0/20

Amazon rating vs actual quality

Fit Risk
4/20

Chance this product isn't for you

BuyChoice Score
4.5

Pros

  • Achieves 80 PLUS Gold and Cybenetics Platinum certifications for energy efficiency.
  • ATX3.1 and PCIe5.1 ready, supporting modern GPU power requirements with a native 12V-2x6 cable.
  • Backed by a 10-year warranty, providing extended coverage.
  • Incorporates 100% Japanese capacitors, ensuring component longevity.
  • Features Cybenetics LAMBDA A+ acoustic certification, indicating quiet operation with a fan that stays off at low loads.
  • Fully modular cable design simplifies system building and cable management.

Cons

  • The dual-color 12V-2x6 cable's green connectors might not match all build aesthetics.
  • Ribbon-style cables, while aiding routing, can be less flexible than individually sleeved cables in tight spaces.
  • Some earlier units might not have the Cybenetics badge on the packaging, requiring online verification.
  • Availability might be limited in some regions, making it hard to find for sale.

Dimension Scores

Efficiency & Output9/10

Achieves 80 PLUS Gold and Cybenetics Platinum certifications, indicating high energy efficiency.

Noise Level9/10

Features a 135mm FDB fan with iCool Intelligent Fan Control and Cybenetics LAMBDA A+ acoustic certification for ultra-quiet operation, often below 20 dB.

Build Quality8/10

Incorporates 100% highly reliable Japanese capacitors and a 10-year warranty, suggesting robust internal components.

Cable Management8/10

Fully modular design with ribbon-style cables simplifies routing and reduces clutter in a PC build.

Best For

  • Gaming PCs with high-end PCIe5.1 GPUs.
  • Quiet PC builds due to LAMBDA A+ certification and iCool fan mode.
  • Users prioritizing long-term component stability with Japanese capacitors and a 10-year warranty.
  • Clean builds benefiting from fully modular, ribbon-style cables.

Not Recommended For

  • Budget builds where 850W and Platinum efficiency are overkill.
  • Users who prefer specific cable aesthetics without green connectors.
  • Compact SFF builds where the 150mm length might be a tight fit.

Watch Out For

  • The dual-color 12V-2x6 cable features green connectors, which may clash with specific PC build color schemes.
  • Some users reported difficulty finding the unit for purchase, indicating limited availability in certain markets.
  • Earlier production units might lack the Cybenetics badge on the physical packaging, requiring users to verify certification online.
  • Ribbon-style cables, while flat, can sometimes be less pliable for extreme bends in very small cases compared to round, individually sleeved cables.

Full Specifications

ASINB0DNLDJJ96
BrandASRock
Wattage850 watts
Form FactorATX
Item Weight6.56 pounds
ManufacturerASRock
Connector TypeATX
Cooling MethodAir
Output Wattage850 Watts
Compatible DevicesPersonal Computer
Product Dimensions5.91 x 5.91 x 3.39 inches
Power Supply DesignFull Modular
Number of Connectors10
Item dimensions L x W x H5.91 x 5.91 x 3.39 inches

What Buyers Say

Professional reviews highlight this PSU's quiet operation, often staying below 20 dB, and its strong power delivery for modern systems. The inclusion of a native 12V-2x6 cable for PCIe5.1 GPUs is a recurring positive point, as is the use of 100% Japanese capacitors for reliability. Some users noted the dual-color green connectors on the 12V-2x6 cable as a specific aesthetic choice.

“Needed a PSU for my new RTX 40-series card, this one had the 12V-2x6 cable and was quiet, but those green bits on the cable are kinda weird with my black and red build.”

Common Praise

  • Achieves Cybenetics LAMBDA A+ acoustic certification, operating quietly, with the fan off at low to medium loads.
  • Includes a native 12V-2x6 cable for direct connection to PCIe5.1 graphics cards.
  • Features 100% Japanese capacitors, contributing to long-term stability.
  • Backed by a 10-year warranty, offering extended peace of mind.
  • Fully modular design makes cable installation and management straightforward.

Common Complaints

  • The green color on the 12V-2x6 cable connectors might not blend with all system color schemes.
  • Availability can be limited in some regions, making it hard to purchase.
  • Some early units shipped without the Cybenetics badge printed on the packaging.
  • Ribbon cables, while flat, can be less flexible for very tight bends compared to individually sleeved cables.

Ownership Tips

  • The iCool fan mode actually works, keeping the system silent during web browsing and light tasks.
  • The ribbon cables are thin and easy to route behind the motherboard tray.
  • The 12V-2x6 cable feels robust and securely clicks into the GPU.
  • The unit runs cool even under gaming loads, with the fan only spinning up noticeably during extended heavy use.

Frequently Asked Questions

Does this PSU support the latest graphics cards?

Yes, it is ATX3.1 and PCIe5.1 ready and includes a native 12V-2x6 cable for modern GPUs.

Is the fan always running?

No, the iCool Intelligent Fan Control Mode allows the fan to remain off under low to medium loads for quieter operation.

What kind of capacitors does it use?

It uses 100% highly reliable Japanese capacitors.

How long is the warranty?

It comes with a 10-year warranty.

Are the cables modular?

Yes, it features a fully modular cable design.

Is it quiet?

Yes, it has a Cybenetics LAMBDA A+ acoustic certification, indicating very quiet operation, often below 20 dB on average.

Buying Guide

When picking a power supply, you're looking for something that can reliably feed all your PC parts without wasting electricity or making too much noise. Wattage needs to match your components, especially your graphics card. Efficiency ratings like 80 Plus Gold tell you how much power it pulls from the wall versus how much it delivers to your PC.

wattage

This is the total power your PSU can deliver, like the horsepower of a car. An 850W unit is enough for most high-end gaming PCs with a single powerful GPU.

80 Plus Gold & Cybenetics Platinum

These are efficiency ratings. Think of it like miles per gallon for your car; higher ratings mean less wasted electricity as heat, saving you money on your power bill and keeping your PC cooler.

ATX3.1 & PCIe5.1 Ready

This means the PSU is built for the latest PC hardware, especially modern graphics cards that use a new 12V-2x6 power connector. It's like having the right charging port for your newest phone.

Fully Modular

This means you only plug in the cables you need. It's like having a custom-built cable organizer for your PC, making your build cleaner and improving airflow.

Alternatives

If you need more power for dual GPUs or extreme overclocking, search for 1000W or higher ATX3.1 PSUs with Platinum or Titanium efficiency. If you have a less demanding system, look for 650W or 750W units with similar certifications.

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