Quick Power Supply Question

Stu 95

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Nov 27, 2013
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So i bought a EVGA GTX 770 4gb and it says it requires a minimum of 600w psu with 42amps on the 12+v rail. Now these number confused me slightly so i just went and bought an OCZ ZS Series 650W ATX. If anyone could just quickly confirm that this power supply will work well enough it would be greatly appreciated.
Thanks
 


Most power supplies ramp up pretty heavily above about 50% load.
You can run a good power supply at 70% or 80% load, but it will generally be loud and you may reduce its life.
Many cheap power supplies won't run at 70% load consistently and often don't have a rating on the combined 12V rails that you would expect from a good power supply.
If people are putting a video card in an existing system, you might compromise on a PSU loaded to 70% providing it is not cheap and nasty (e.g. Shaw).
When buying a new power supply however, they are much better off in the long run buying something a little more powerful in a good brand.
A good quality 650W power supply is perfect for this system if it is not overclocked (beyond the factory GPU overclock).