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ASRock Steel Legend SL-1200GW 1200W Power Supply Review

Do you need an all-white power supply? Well how about the ASRock Steel Legend SL-1200GW PSU? The power supply uses 100% Highly Reliable Japanese Capacitors for superior power efficiency, and features a powerful +12V single rail @ a whopping 100A, giving you a total power output of up to 1200W.

This PSU is fully modular and it’s certified 80 PLUS GOLD, along with Cybenetics PLATINUM and LAMBDA A+ ratings, as well as supporting the latest ATX3.1 & PCIe5.1 standards. It also features a built-in 5V BOOST function for extra stability.

The package comes with a full set of flat modular cables which includes the standard 24-pin ATX, 2 x 8-pin PCIE for your motherboard, 3 x 8-pin (6+2) PCIE cable, 1 x SATA power cable, 1 x Molex cable. There’s also 2 x 16-pin 12VHPWR cable (rated up to 600W) with a dual colour design for Nvidia’s next-gen graphics card. This allows you to see and make sure that the cables are fully plugged in between the graphics card and the power supply.

For cooling, it comes with a 135mm striped axial FDB fan, and features ASRock’s iCool Intelligent Fan Control Mode for quiet operation.

It also offers a full suite of protection standards such as OVP (Over Voltage), UVP (Under Voltage), SCP (Short Circuit),OTP (Over Temp) and OPP (Over Power), plus it comes with an impressive 10-Year warranty for peace of mind.

The ASRock SL-1200GW power supply is certified Cybenetics PLATINUM with LAMBDA A+ ratings. You’re probably asking what is this? Well, it’s a recognised certification for power supplies that high-light performance, build quality, reliability and noise level. For more information about Cybernetics and LAMBDA go here.

When it comes to power supplies, the most important thing for users, is stability and power efficiency, and this can only be achieved with high quality components and adequate cooling. This power supply should be able satisfy the most demanding of users, and is perfect for high-end PCs, or workstations with dual GPUs required for heavy AI workloads.

I would like to thank ASRock for providing the review sample. This is a snippet from what ASRock has to say about themselves on their website:

 

ASRock Inc. is established in 2002, specialized in the field of motherboards. ASRock strives to build up its own brand. With the 3C design concept, “Creativity, Consideration, Cost-effectiveness”, the company explores the limit of motherboards manufacturing while paying attention on the eco issue at the same time, developing products with the consideration of eco-friendly concept.

 

ASRock has been growing fast and become world third largest motherboard brand with headquarter in Taipei, Taiwan and branches in Europe and the USA. The young and vibrant company targets from mainstream to enthusiast MB segments for different kinds of users, owning reputation around the world market with its reliability and proficiency.

To test the power supply, we’ll be using our usual test rig which is comprised of an AMD Rzyen 9 9950X processor, which has a max TDP of 170W+. We’ll also be using an ASRock X870 LiveMixer motherboard, 48GB of DDR5-8000 ram, a Corsair MP700 2TB PCIE Gen5 SSD, and a GeForce RTX 4080 Super. For cooling, we’ll using a Thermaltake ToughLiquid Ultra 360 AIO cooler mounted with 3 x Corsair iCUE Link RX120 RGB cooling fans.

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