ASRock
ASRock Steel Legend SL-1200P 1200W ATX Power Supply
Bottom line: The ASRock Steel Legend SL-1200P 1200W ATX Power Supply: 1200W on 80 Plus and Cybenetics Platinum for multi-GPU and overclocked builds; main trade-off: standard ATX depth may not clear compact or SFF cases.
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Pros & Cons
Pros
- ✓ 1200W on 80 Plus and Cybenetics Platinum for multi-GPU and overclocked builds
- ✓ Native 12V-2x6 connector with TempGuard, ATX3.1 and PCIe 5.1 compliant
- ✓ 10-year manufacturer warranty, long even for a flagship ATX unit
- ✓ 100% Japanese capacitors for voltage stability under peak transient loads
- ✓ 5V BOOST circuit keeps ARGB lighting from dimming or flickering
Cons
- ✗ Standard ATX depth may not clear compact or SFF cases
- ✗ 135mm fan is larger than the 120mm most mid-tower PSU bays expect
- ✗ ASRock is newer to PSUs than to motherboards, so long-term RMA data is limited
Manufacturer description
The ASRock Steel Legend SL-1200P is a flagship 1200W power supply engineered for enthusiasts who demand uncompromising performance and reliability. Achieving 80 Plus Platinum and Cybenetics Platinum certification, it operates with exceptional efficiency to keep your system cool and energy costs low. Fully compliant with ATX3.1 and PCIe 5.1 standards, it is built for the future, equipped with a native 12V-2x6 connector featuring TempGuard technology to safely power the most demanding next-generation graphics cards. Constructed with premium 100% Japanese capacitors, this PSU guarantees…
SpecPicks Verdict
SpecPicks scored ASRock Steel Legend SL-1200P 1200W ATX Power Supply using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. ASRock's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- High-Wattage 1200W Power: Delivers ample, stable power for extreme gaming rigs, workstations with multi-GPU setups, and high-end overclocked components.
- Premium 80 Plus Platinum Efficiency: Certified for top-tier energy efficiency (Cybenetics Platinum), reducing operational heat, noise, and electricity costs.
- ATX3.1 & PCIe 5.1 Ready: Future-proof design compliant with the latest standards, featuring a native, safer 12V-2x6 connector with TempGuard for next-gen GPUs.
- Intelligent 12V-2x6 Connector: The Dual Color 12V-2x6 connector incorporates TempGuard technology to prevent overheating and ensure a secure fit.
- Premium Japanese Capacitors: Built with 100% high-reliability Japanese capacitors for unwavering voltage stability, longevity, and performance under peak loads.
- Quiet 135mm FDB Fan Cooling: Features a large 135mm Striped Axial Fluid Dynamic Bearing fan with iCool intelligent fan control for excellent airflow with minimal noise.
Full Specifications
| Brand | ASRock |
|---|---|
| Wattage | 1200 watts |
| Model Name | SL-1200P |
| Form Factor | ATX |
| Model Number | 90-UXS120-PFUAAA |
| Compatibility | PC |
| Connector Type | ATX, PCI Express |
| Cooling Method | Air |
| Number of Fans | 1 |
| Output Wattage | 1200 watts |
| Item Dimensions | 5.91 x 5.91 x 3.39 inches |
| Mfr Part Number | PS-SL-1200P |
| Number of Items | 1 |
| Compatible Devices | Personal Computer |
| Power Supply Design | Full Modular |
| Warranty Description | 10 years |
| Maximum Input Voltage | 110 volts_of_alternating_current |
| Minimum Input Voltage | 90 volts_of_alternating_current |
| ATX3.1 & PCIe 5.1 Ready | Future-proof design compliant with the latest standards, featuring a native, safer 12V-2x6 connector with TempGuard for next-gen GPUs. |
| High-Wattage 1200W Power | Delivers ample, stable power for extreme gaming rigs, workstations with multi-GPU setups, and high-end overclocked components. |
| Full listing title | ASRock Steel Legend SL-1200P 1200W ATX Power Supply, 80 Plus Platinum, ATX3.1 & PCIe 5.1 Ready, Fully Modular, 135mm FDB Fan, 10-Year Warranty |
Ready to buy?
ASRock Steel Legend SL-1200P 1200W ATX Power Supply, 80 Plus Platinum, ATX3.1 & PCIe 5.1 Ready, Fully Modular, 135mm FDB Fan, 10-Year Warranty is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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