ASRock Steel Legend SL-1200GW 1200W 80 Plus Gold & Cybenetics Platinum Full Modular Power Supply ATX3.1 PCIe5.1 Ready with Dual Color 12V-2x6 Cable 10 Years Warranty White Edition Japanese Capacitor
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AI Verdict
This 1200W ATX3.1, PCIe5.1 power supply with 80 Plus Gold and Cybenetics Platinum certifications is for high-end PC builds needing future-proof power delivery.
This power supply is built for high-end systems needing substantial, stable power and future-proofing. Its 1200W output, ATX3.1/PCIe5.1 compliance, and native 12V-2x6 connector directly address the demands of modern, powerful GPUs. The 10-year warranty and Japanese capacitors suggest a focus on long-term reliability.
If 1200W is too much, look for the 1000W or 850W variants in the Steel Legend series, which also carry 80 Plus Gold and Cybenetics Platinum ratings.
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Pros
- Meets ATX3.1 and PCIe5.1 standards with a native 12V-2x6 connector for current and future GPUs.
- Achieves 80 PLUS Gold efficiency and Cybenetics Platinum/Lambda A acoustic ratings for energy savings and quiet operation.
- Features a fully modular design for customized cable management.
- Utilizes 100% Japanese capacitors, contributing to durability.
- Includes a 135mm Fluid Dynamic Bearing (FDB) fan with iCool Intelligent Fan Control for near-silent operation at low loads.
- Backed by a 10-year warranty, indicating manufacturer confidence in longevity.
Cons
- The white color scheme and matching cables might not fit all PC builds.
- The 5V BOOST function is specifically for enhanced RGB control, which is a niche feature for a power supply.
- The iCool fan control has an 'OFF' mode that runs the fan continuously, potentially increasing noise.
Dimension Scores
Achieves 80 PLUS Gold and Cybenetics Platinum certifications, indicating high energy efficiency and stable 1200W output.
Features a 135mm FDB fan with iCool Intelligent Fan Control for silent operation at low loads and carries a Cybenetics Lambda A/A+ acoustic certification.
Incorporates 100% Japanese capacitors and is backed by a 10-year warranty, suggesting a focus on durability and component quality.
Its fully modular design allows for complete customization and reduction of unnecessary cables, improving airflow and aesthetics.
Best For
- High-performance gaming PCs with power-hungry, next-gen GPUs.
- Custom PC builds prioritizing a white aesthetic.
- Workstations requiring stable and efficient power delivery for intensive tasks.
Not Recommended For
- Budget-conscious PC builds where 1200W is overkill.
- Compact ITX systems due to its standard ATX form factor.
- Users who prefer a black or other non-white internal component aesthetic.
Watch Out For
- As of March 2026, this product is not yet available for purchase (Date First Available: July 31, 2025), so there are no real user reviews or complaints to analyze.
- The dual-color 12V-2x6 cable design, while intended for proper connection, might clash visually if not fully seated or if users prefer a uniform look.
Full Specifications
| ASIN | B0FKL8L37F |
| Brand | ASRock |
| Wattage | 1200 watts |
| Model Name | SL-1200GW |
| Form Factor | ATX |
| Item Weight | 8 pounds |
| Manufacturer | ASRock |
| Connector Type | ATX, PCI Express |
| Cooling Method | Air |
| Output Wattage | 1200 Watts |
| Item model number | 90-UXS120-GFUABA |
| Compatible Devices | Personal Computer |
| Product Dimensions | 5.9 x 5.9 x 3.39 inches |
| Power Supply Design | Full Modular |
| Item dimensions L x W x H | 5.9 x 5.9 x 3.39 inches |
What Buyers Say
Since this power supply isn't available until July 31, 2025, there are no actual user reviews or complaints yet. Professional reviews highlight its robust build with 100% Japanese capacitors and a 10-year warranty. The unit is praised for meeting ATX3.1 and PCIe5.1 standards, including a native 12V-2x6 connector, making it ready for future high-end GPUs. Its 80 PLUS Gold and Cybenetics Platinum ratings, combined with the iCool fan control, point to efficient and quiet operation. The white aesthetic with matching cables is a specific design choice.
“I can't even buy this thing yet, but if it's as quiet and beefy as they say for my new RTX 5090 build, I'm grabbing it the second it drops, especially with that 10-year warranty, that's just smart money.”
Common Praise
- ATX3.1 and PCIe5.1 compliance with native 12V-2x6 connector for next-gen hardware.
- High energy efficiency with 80 PLUS Gold and Cybenetics Platinum certifications.
- Quiet operation due to iCool Intelligent Fan Control and Cybenetics Lambda A/A+ acoustic rating.
- Full modularity simplifies cable routing and reduces clutter.
- Uses 100% Japanese capacitors for enhanced durability.
- Comes with a 10-year warranty, offering long-term assurance.
Common Complaints
- No actual user complaints are available yet as the product's release date is in the future (July 31, 2025).
Ownership Tips
- Actual long-term performance and fan noise under sustained heavy loads will only be known after the product's release and user testing.
- The effectiveness of the dual-color 12V-2x6 connector in preventing improper seating will be a practical test for users.
- The real-world impact of the 5V BOOST for RGB control will depend on specific component compatibility and user setups.
Frequently Asked Questions
Is this power supply compatible with NVIDIA's RTX 40-series GPUs?
Yes, it is PCIe 5.1 ready and includes a native 12V-2x6 connector, which is designed for next-gen GPUs like the RTX 40-series.
Does this power supply make a lot of noise?
It's Cybenetics Lambda A/A+ certified for acoustics and features iCool Intelligent Fan Control, which keeps the 135mm FDB fan off during low to medium loads for near-silent operation.
What does 'fully modular' mean for the cables?
Fully modular means all cables detach from the power supply. This allows you to only connect the cables your system needs, improving airflow and making cable management easier.
What is the purpose of the 5V BOOST function?
The built-in 5V BOOST function is designed to provide enhanced control for RGB lighting components in your PC.
Is this power supply available in colors other than white?
The ASRock Steel Legend series also offers 'Steel Black' variants, but this specific SL-1200GW model is presented as a 'White Edition'.
Buying Guide
When you're looking at a power supply, you're basically picking the heart of your PC. It needs to deliver enough juice for all your components, especially your graphics card, without breaking a sweat or making a racket. You also want it to be efficient so you're not wasting electricity and generating unnecessary heat. Pay attention to the wattage and certifications to make sure it matches your PC's needs.
Wattage (1200W)
80 PLUS Gold & Cybenetics Platinum
ATX3.1 & PCIe5.1 Ready with 12V-2x6 connector
Fully Modular Design
Alternatives
If you don't need 1200W, look for power supplies with lower wattage (e.g., 850W or 1000W) but still featuring 80 PLUS Gold or Platinum efficiency, ATX3.1/PCIe5.1 compliance, and a fully modular design for modern builds.
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