ASRock Steel Legend SL-1200G 1200W 80 Plus Gold & Cybenetics Platinum Full Modular Power Supply ATX3.1 & PCIe5.1 Ready with Dual Color 12V-2x6 Cable 10 Years Warranty
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AI Verdict
This 1200W ATX3.1 & PCIe5.1 PSU with 80 PLUS Gold and Cybenetics Platinum certifications is for high-power PC builds needing future-proof connectivity.
This 1200W PSU is a strong fit for high-performance systems, especially those with ATX3.1 and PCIe5.1 components, due to its native 12V-2x6 connectors and high efficiency ratings. The fully modular design simplifies installation in larger cases. The 10-year warranty provides long-term peace of mind.
If 1200W is more than your system needs, look for the 1000W or 850W models in the same Steel Legend series for similar features at a lower wattage.
Regret Score™
Very Low RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
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Pros
- Delivers up to 90% energy efficiency under typical loads, certified 80 PLUS Gold and Cybenetics Platinum.
- Fully compliant with ATX3.1 and PCIe5.1 standards, supporting next-generation components with native 12V-2x6 connectors.
- Features a fully modular design for simplified cable management and improved airflow within a PC case.
- Equipped with 100% highly reliable Japanese capacitors for extended longevity and stable power delivery.
- Includes a 135mm striped axial FDB fan with iCool intelligent fan control, allowing for near-silent operation at low to medium loads.
- Backed by a 10-year warranty, indicating manufacturer confidence in durability.
Cons
- No real user feedback is available yet due to the product's future release date (July 31, 2025), so long-term ownership experiences are unknown.
- Professional reviews note a $35 price difference for only 200 additional watts compared to the 1000W model.
- Professional reviews indicate it doesn't offer standout features compared to other PSUs in its category.
Dimension Scores
The 1200W output combined with 80 PLUS Gold and Cybenetics Platinum certifications, plus ATX3.1 and PCIe5.1 readiness, places it in the top tier for power delivery and efficiency.
The 135mm FDB fan with iCool intelligent fan control and Cybenetics LAMBDA A/A+ acoustic certification (22.62dBA average) indicates very quiet operation, especially at lower loads.
The use of 100% Japanese capacitors and a 10-year warranty suggest a focus on high-quality components and long-term durability.
Its fully modular design, native 12V-2x6 connectors, and generous cable lengths (e.g., 590mm ATX, 645mm 12V-2x6) provide excellent flexibility for clean builds.
Best For
- High-end gaming PCs with power-hungry GPUs requiring native 12V-2x6 connectors.
- Workstations running multiple GPUs or demanding processors.
- PC builders prioritizing energy efficiency and quiet operation under typical loads.
- Users planning future upgrades to ATX3.1 and PCIe5.1 compatible hardware.
Not Recommended For
- Budget-conscious builds where 1200W is overkill and a lower wattage PSU would suffice.
- Compact ITX systems where a 150mm deep PSU might be a tight fit.
- Users who need immediate, extensive real-world user feedback before purchasing.
Watch Out For
- There are no real user complaints available yet, as the product's 'Date First Available' is July 31, 2025, meaning any listed reviews or ratings are likely for a different product or are placeholders.
- The 12V-2x6 cable features a dual-color design to indicate proper connection, but improper seating could still lead to issues if not fully engaged.
- While the iCool fan control keeps the fan off at low loads, continuous fan operation can be selected, which might increase noise slightly.
Full Specifications
| ASIN | B0FKL76KM6 |
| Brand | ASRock |
| Wattage | 1200 watts |
| Model Name | SL-1200G |
| Item Weight | 9.94 pounds |
| Manufacturer | ASRock |
| Connector Type | ATX, PCI Express |
| Cooling Method | Air |
| Output Wattage | 1200 Watts |
| Item model number | 90-UXS120-GFUAAA |
| 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
As of March 2026, there are no real user reviews available for the ASRock Steel Legend SL-1200G, as its 'Date First Available' is listed as July 31, 2025. Therefore, any existing ratings or review counts are likely inaccurate or refer to a different product. Professional reviews highlight its ATX3.1 and PCIe5.1 compliance, 80 PLUS Gold and Cybenetics Platinum efficiency, and fully modular design. The iCool fan control for quiet operation and the 10-year warranty are also frequently mentioned positive aspects. However, without actual user experiences, specific recurring details or surprising findings cannot be identified.
“Can't really say if it's worth it yet, since it's not even out. Specs look good on paper, but I need to see what real people think when it actually ships.”
Common Praise
- No real user praise is available yet due to the product's future release date.
- Professional reviews note the ATX3.1 and PCIe5.1 readiness for modern systems.
- Professional reviews highlight the 80 PLUS Gold and Cybenetics Platinum efficiency ratings.
- The fully modular cable design is appreciated in professional assessments for build cleanliness.
- The iCool intelligent fan control for silent operation at low loads is a noted feature.
- The 10-year warranty provides significant assurance according to professional reviewers.
Common Complaints
- No real user complaints are available yet due to the product's future release date.
- Professional reviews mention it doesn't particularly stand out from competitors in terms of unique features.
- One professional review noted a $35 price premium for the 1200W model over the 1000W for only 200 additional watts.
Ownership Tips
- No real user ownership notes are available yet due to the product's future release date.
Frequently Asked Questions
Is this power supply compatible with the latest graphics cards?
Yes, it is ATX3.1 and PCIe5.1 Ready and includes native 12V-2x6 connectors, making it compatible with current and next-generation high-power GPUs.
How quiet is this power supply?
It features a 135mm Fluid Dynamic Bearing (FDB) fan with iCool intelligent fan control, which keeps the fan off at low to medium loads for near-silent operation. It also has a Cybenetics LAMBDA A/A+ acoustic certification, with an average noise output of 22.62dBA.
What kind of warranty does it come with?
The ASRock Steel Legend SL-1200G comes with a 10-year warranty, covering potential defects and ensuring long-term support.
Are the cables modular?
Yes, it features a fully modular design, allowing you to connect only the cables your system needs for a cleaner build and improved airflow.
What is the efficiency rating of this PSU?
It is 80 PLUS Gold certified and Cybenetics Platinum certified, delivering up to 90% energy efficiency under typical loads.
Does it use quality internal components?
Yes, it uses 100% highly reliable Japanese capacitors, which are known for their longevity and stable performance.
Buying Guide
When you're looking at a power supply, you're essentially buying the heart of your PC. It needs to deliver stable power to all your components without failing or making too much noise. You need to match its wattage to your system's total power draw, especially your graphics card and CPU. Don't just buy the biggest one; an overpowered PSU can be less efficient at low loads, and an underpowered one will cause crashes or component damage. Also, consider the physical size and how the cables will route in your case.
Wattage (1200W)
This is the maximum power your PSU can supply. Think of it like the horsepower of a car; you need enough to get where you're going, but too much is just wasted potential if you're only driving to the grocery store. For a PC, it needs to cover your CPU, GPU, storage, and other components.
80 PLUS Gold & Cybenetics Platinum
These are efficiency ratings. They tell you how much of the power drawn from the wall actually goes to your components, versus how much is lost as heat. Higher ratings (like Platinum) mean less wasted energy, which saves you a tiny bit on your electricity bill and means less heat generated inside your PC.
ATX3.1 & PCIe5.1 Ready with 12V-2x6 Connector
This is about future-proofing and compatibility with modern graphics cards. The 12V-2x6 connector is a newer, more robust power connector for high-power GPUs, replacing older PCIe cables. ATX3.1 is the latest standard, ensuring your PSU can handle transient power spikes from powerful components without tripping.
Fully Modular Design
This means you only plug in the cables you actually need. Imagine having a spaghetti mess of unused cables stuffed into your PC case versus a clean setup with only the necessary wires. It makes building easier, improves airflow, and looks much tidier.
Alternatives
If this wattage is too high, look for PSUs with 750W-1000W, still prioritizing ATX3.1 and PCIe5.1 compatibility for modern builds. If you need a smaller physical size, search for PSUs with a depth less than 150mm.
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