Roundup: 12 Gaming Power Supplies Compared

Cooler Master GX 750: Results

Efficiency meets 80 PLUS specifications:

Efficiency under different load profiles:

As expected, the 80 PLUS-certified Cooler Master GX 750 cannot keep up with the higher efficiencies of the Silver- and Gold-certified PSUs, but it does comply to the specifications, if only loosely, and with no additional margins above the 80% efficiency limit.

In the remaining tests, Cooler Master's GX 750 fully meets the expectations of an 80 PLUS power supply, even if its efficiency drops a bit under low loads. It does mess up a bit with the ripple and noise though, giving us a reading on the 3.3 V rail that is 50% above the ATX specification limit. The good results for the 5 and 12 V rails suggest that this is a weakness in the PSU design.

The Cooler Master GX 750 is the only basic 80 PLUS-certified unit in this roundup, and is faced with almost overwhelming competition. It holds up fairly well, though. Its modest price and performance are appropriate, though the small ripple problem overshadows our general impression, especially with so many other good units in our roundup.

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  • tasiogurria
    "Same" power but big different in price (Almost in Spain). Antec keep rocking all them.
  • brianthesnail
    interesting to see NZXT on the same level as tagan and ocz with regards to power supplys.... i have the M59 chassis from NZXT and its a excellent allround gaming case.... and by the looks of their psu,s i may invest in one of theres ... the single +12v rail looks solid especially for my XFX GTS250
  • irish_adam
    am i the only one that cares how load the PSU is?
  • mi1ez
    Would be nice to see them properly stress tested and more explanation with the ripple and noise graphs!
  • Silmarunya
    DadiggleThats one big list of junk psu

    What a well motivated and intelligent comment. Please let me know what PSU's aren't junk PSU's then. I can think of very few brands that make quality PSU's that were left out here. Silverstone maybe, but that's about it.
  • mannagoo123
    really dont buy a psu only if your 300 watts short i mean come on cpu and grafic card can still run on a 300 watts (even if it doesnt have a 6 pin connecter)!!!
  • Anonymous
    Hi i bought a N440GT 1gbytes ddr3 Graphics card can it make the computer freeze or can it give the computer problems if the power supply watts is small like the requirements for the graphics is 450W 12V 38A power suply and my is 300W.