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At CeBIT, a retail box of the soon to be released NVIDIA GTX 480 “Fermi” graphics card indicates that a minimum 600 watt power supply is needed. Good thing I have a reliable 750 watt PSU from Corsair. Who said that PC gaming was cheap?


Everyone knows that consoles are much more affordable than even mid-range PC gaming machines, but you get your money’s worth with much higher resolution (up to 2560 x 1600) and sharper textures (16X FSAA, anyone?) than either the Xbox 360 or PS3 can dream of. One of the most crucial components in a higher performance PC is the powers supply. Anyone who knows anything about building or buying gaming (or video rendering) towers will tell you to pick a higher capacity PSU than you currently need. I recommend a 750 watt or higher Corsair if you are building a Nehalem gaming PC.


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Quite correct. All better brand PSUs (Seasonic, Antec, Corsair, etc.) are around the 80% range. Since most GTX 480 buyers will be running quad core or higher, they really should be looking for a PSU at 750 watts, if they plan on keeping the PSU for more than 5 years. Down the line, they might want to SLI/Crossfire or at leas upgrade to the next generation of GPUs.

Another thing to know is efficiency ratings. Nvidia and ATI always list PSU ratings as lowest common denominator towards statistics. Given that most PSU’s are inefficient and listed at 60% or lower, you have headroom when buying lower Watt CPU’s.

I always used a PSU with an 80%+> rating.

My Mac Pro had a 80% PSU ratting so therefore the 300W psu was more than effective than the 350 watt recommended.

The math
If manufacture suggests 350 watt (60% rating)
then that equates to 180 watts being needed.
SO therefore a 300W PSU would supply 240Watts.

Based on your article a 600W PSU would be: 360W
so therefore would really require a 450W pSU supplying 80% efficiency.

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