ASRock Steel Legend SL-1200P 1200W 80 Plus Platinum Fully Modular

PSU Tier A • ASRock • $ 179.99

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The ASRock Steel Legend SL-1200P is a high-performance power supply unit designed for enthusiasts and professionals who demand uncompromising reliability and efficiency. With a massive 1200W continuous output on a single +12V rail, this PSU can effortlessly power the most demanding gaming rigs, workstations, and content creation systems, including those equipped with multiple GPUs or flagship processors.

Key Features

80 PLUS Platinum Certified: Achieves up to 92% efficiency at 115VAC and 94% at 220VAC, reducing heat and electricity costs.
Fully Modular Design: Install only the cables you need for a clean, clutter-free build and improved airflow.
135mm Fluid Dynamic Bearing Fan: Provides quiet, long-lasting cooling with Zero RPM Mode for near-silent operation under light loads.
Comprehensive Protections: OVP, UVP, OPP, OCP, OTP, and SCP safeguard your valuable components.
Premium Cable Set: Includes all essential cables: 1x 24-pin ATX, 2x 8-pin EPS12V, 6x 6+2-pin PCIe, 8x SATA, 4x Molex, and a floppy adapter.

Performance and Efficiency

The SL-1200P delivers stable and clean power, thanks to its single +12V rail design that ensures consistent voltage regulation even under extreme load spikes. The 80 PLUS Platinum certification guarantees high efficiency, which translates to lower operating temperatures and reduced energy bills. The Zero RPM fan mode keeps the PSU completely silent during everyday tasks, while the fan kicks in only when needed, providing optimal cooling during intense gaming or heavy workloads.

Who Is It For?

This PSU is perfect for PC builders who are constructing a high-end gaming PC with multiple graphics cards, a powerful overclocked CPU, or a professional workstation for video editing, 3D rendering, or scientific computing. Its 1200W capacity offers ample headroom for future upgrades, making it a future-proof investment.

Build Quality and Aesthetics

True to the Steel Legend series, this PSU features a rugged, industrial design with a matte black finish and subtle gold accents. The fully modular cabling system uses high-quality, flat black cables that are easy to route and manage, enhancing both aesthetics and airflow within your case.

Conclusion

In summary, the ASRock Steel Legend SL-1200P combines robust power delivery, exceptional efficiency, and quiet operation, making it an excellent choice for anyone building a top-tier system. Whether you're a gamer, overclocker, or content creator, this PSU provides the reliability and performance you need.

Key Specifications

Connector Type: ATX12V / EPS12V (fully modular)

Output Wattage: 1200 Watts continuous (single +12 V rail)

Form Factor: ATX (160 × 150 × 86 mm)

Wattage: 1200 W

Cooling Method: Air‑cooled, 135 mm Fluid Dynamic Bearing fan with Zero RPM Mode (semi-fanless / silent / cooling mode)

Design: Full Modular

Protections: OVP, UVP, OPP, OCP, OTP, SCP

Efficiency: 80 PLUS Platinum certified (≈ 92 % @115 VAC / ≈ 94 % @220 VAC)

Cable Set: 1X 24‑pin ATX motherboard 2X 8‑pin EPS12V (4+4) CPU connector 6X 6+2‑pin PCIe 8X SATA 4X Four‑Pin Peripheral (Molex) 1X Floppy‑drive adapter

Detailed Parameters

Rated Power Output in Watts:: 1200
Form Factor:: ATX

Where to Buy

Amazon

Pros

80 Plus Platinum efficiency (up to 94% at 220V)
Fully modular design for clean cable management
135mm FDB fan with Zero RPM mode for silent operation
Single +12V rail provides stable power delivery
Comprehensive protection suite (OVP, UVP, OPP, OCP, OTP, SCP)

Cons

Large 160mm depth may not fit in compact cases
Floppy adapter is outdated for modern builds
Premium price compared to Gold-rated units

Frequently Asked Questions

Is the ASRock Steel Legend SL-1200P compatible with ATX 3.0 and PCIe 5.0?

The SL-1200P is based on ATX12V / EPS12V standards and does not include the native 12VHPWR connector. However, it comes with six 6+2-pin PCIe connectors, which can power PCIe 5.0 GPUs using the included adapters (not provided). For native ATX 3.0 support, consider newer models.

Does the fan always spin?

No, the SL-1200P features a Zero RPM mode. Under low loads (typically below 40-50% load), the fan remains off for silent operation. It only spins up when needed, and you can also switch to a continuous cooling mode via the included switch.

What is the warranty period for this PSU?

ASRock typically offers a 10-year warranty on their high-end power supplies like the Steel Legend series. However, always check the official ASRock website or your retailer for the exact warranty terms in your region.

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