ASRock Steel Legend SL-1200GW 1200W 80 Plus Gold Cybernetics Platinum Full Modular

PSU • ASRock • $ 144.99

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Overview

Unleash Your System's Potential with the ASRock Steel Legend SL-1200GW

The ASRock Steel Legend SL-1200GW is a premium 1200-watt power supply designed for enthusiasts, gamers, and content creators who demand uncompromising performance and reliability. With its 80 PLUS Gold certification and Cybernetics Platinum rating, this PSU delivers exceptional efficiency—up to 92% at typical loads—reducing heat and energy costs while ensuring stable power delivery even under heavy overclocking.

Key Features and Benefits

Full Modular Design: Install only the cables you need for a clean, clutter-free build and improved airflow.
ATX 3.0 & PCIe 5.0 Ready: Includes a native 16-pin 12VHPWR connector for next-gen GPUs, supporting up to 600W power delivery.
Single +12V Rail: Delivers up to 1200W of continuous power on a single rail, ensuring stable and consistent voltage for all components.
135mm Fluid Dynamic Bearing Fan: Whisper-quiet operation with Zero RPM Mode, which stops the fan entirely under low loads for silent computing.
Comprehensive Protections: OVP, UVP, OPP, OCP, OTP, and SCP safeguard your valuable hardware from electrical anomalies.
Premium Components: Japanese capacitors and high-quality circuitry ensure long-term durability and stable output.

Performance and Efficiency

The SL-1200GW achieves 80 PLUS Gold efficiency (up to 90% at 115VAC, 92% at 220VAC) and has been independently verified by Cybernetics with a Platinum rating for real-world performance. This means lower electricity bills and less heat generation, making it ideal for systems that run 24/7.

Who Is It For?

This power supply is perfect for high-end gaming PCs with multiple GPUs, workstations running demanding applications, and custom water-cooling loops. Its 1200W capacity provides ample headroom for future upgrades, including the latest high-power CPUs and graphics cards.

Connectivity and Cables

The fully modular cable set includes: 1x 24-pin ATX, 2x 8-pin EPS12V (4+4), 6x 6+2-pin PCIe, 1x 16-pin 12VHPWR, 8x SATA, and 4x Molex. All cables are flat and black, making cable management effortless.

Conclusion

With its robust build, high efficiency, and comprehensive feature set, the ASRock Steel Legend SL-1200GW is a top-tier choice for anyone building a powerful, reliable, and future-proof system.

Key Specifications

Connector Type: ATX12V / EPS12V (fully modular)

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

Form Factor: ATX (150 x 150 x 86 mm)

Wattage: 1200 W

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

Design: Full Modular

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

Efficiency: 80 PLUS Gold certified (≈ 90 % @115 VAC / ≈ 92 % @220 VAC)

Cable Set: 1X 24‑pin ATX motherboard 2X 8‑pin EPS12V (4+4) CPU connector 6X 6+2‑pin PCIe 1X 16‑pin (12VHPWR) PCIe 5.0 8X SATA 4X Four‑Pin Peripheral (Molex)

Detailed Parameters

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

Where to Buy

Amazon

Pros

High 1200W capacity with single +12V rail for stable power
80 PLUS Gold and Cybernetics Platinum efficiency ratings
Fully modular design simplifies cable management
Native 12VHPWR connector for PCIe 5.0 GPUs
Zero RPM fan mode for silent operation under light loads

Cons

Large 150mm depth may not fit in compact cases
Premium price compared to lower-wattage PSUs
Semi-fanless mode may require manual activation (if not automatic)

Frequently Asked Questions

Is the ASRock Steel Legend SL-1200GW compatible with ATX 3.0 GPUs?

Yes, it includes a native 16-pin 12VHPWR connector, making it fully compatible with ATX 3.0 and PCIe 5.0 graphics cards.

Does this PSU support multi-GPU setups?

Absolutely. With six 6+2-pin PCIe connectors and a 12VHPWR connector, it can power multiple high-end graphics cards, though most modern systems use a single powerful GPU.

What is the Zero RPM Mode and how does it work?

Zero RPM Mode stops the fan entirely when the load is below a certain threshold (typically around 40% load), allowing for silent operation during idle or light tasks. The fan spins up only when needed to keep temperatures in check.