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Graphics card wants a LOT of power

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Last response: in Systems
October 5, 2010 5:01:06 AM

Hi all,

I just built a system and burnt out the power supply in my crappy $84 microatx case/power supply combo.

Looking at the manual for my N450GTS, it says that it recommends a minimum 450W supply with a 12V rail that can do 38A. That seems like a LOT to me, not to mention that it's over 500W just for the card!

Is this a sane requirement? Any suggestions? My case is this:

so I think it can (barely) take full size ATX supplies even though it also takes microatx motherboards.


More about : graphics card lot power

a b U Graphics card
October 5, 2010 5:09:39 AM

I have one rig at home with a similiar case but i bought it w/o PSU :p  The only thing to take note is

Length of PSU should be preferably 150mm or less and take care about the lenght of your ODD selected as well.

Actually i had built preety high end LANparty gamers withthis box and have a look at Enermax Liberty ECO 500/620? Else hunt for PSUs on 120mm fans - the Corsair HX520 reported fitting fine as well
a b ) Power supply
a b U Graphics card
October 5, 2010 5:15:53 AM

EDIT: Dint refresh, like he said, the length would be the issue here,...

^ For that GPU, 450W PSU is required, but not a necessity that the 12V should do 38A, but at minimum 30A would be needed though, so play safe and get the one which has 30A+ on the 12V and is an 80+ certified, Active PFC PSU...
That case will take standard ATX PSUs, but you have to be careful with the length of the PSUs as it might interfere with the Optical drives...
a c 144 ) Power supply
a b U Graphics card
October 5, 2010 5:22:12 AM

The recommended power requirements look a little ... questionable.

The 450GTS needs about 8 amps - factory OC'd, certainly not more than 10 amps. The recommendation is for a complete system. Something like a Corsair 450VX would work nicely.

Of the two PSU's that gkay linked to, the Seasonic would be an excellent choice.