High-efficiency power supplies only seem to be growing in popularity. We wrapped up a four-way roundup of three such units only two weeks ago, and already, we see Cooler Master has crowded the playing field further with three PSUs all rated for 85% efficiency.
The Cooler Master GX Series includes 550W, 650W, and 750W models, which all have single 12V rails, 120-mm cooling fans, five-year warranties, and 80 Plus certification. To put things in perspective, the 12V rail on the 750W unit can pump up to 60A, or 720W, making up the bulk of the unit’s capacity. That’s good news for folks hoping to run powerful CPUs and multi-GPU setups.
In fact, Cooler Master specifically says it designed the GX family to "deliver more than ample power to dual graphics card systems," and that the 750W model received SLI certification from Nvidia. The 550W and 650W units each have two 6/8-pin PCI Express power connectors, while the 750W has four.
On the power-efficiency front, the company quotes a "typical" 85% for all three units. However, the 80 Plus certification logo on the box photos is black and white, which normally denotes 80% efficiency. We can’t find these new GX units in 80 Plus’ list of certified PSUs just yet, though, so perhaps the black-and-white label is only preliminary, and the units will soon don 80 Plus Bronze or Silver badges.