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Windows 7: ATI HD 3870 sufficient PSU?

10 Jun 2010   #1

windows 7 Ultimate 32bit & 64bit
 
 
ATI HD 3870 sufficient PSU?

Hey guys i'm fixing a relative's pc, (gateway desktop) the video card went on it, I have a spare card laying around ati hd 3870, the system req. is a 450watt psu, but the one in the pc is only 300watt, they dont play 3d games on it, mostly movies and other desktop application, do you think i can still use it without blowing the computer?

thanks.


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10 Jun 2010   #2

Windows 7 Pro X64 SP1
 
 

I don't know if you need to worry about "blowing the computer", but the 300W PSU may not have enough capacity.

The 3870 uses a 6 pin PCI-E auxiliary power connector, so it can consume up to 150W in principle. A quick check online suggests that it actually uses more than 120W.

You may be able to use a lesser PSU, as long as it's a good one, like:

Newegg.com - CORSAIR CMPSU-400CX 400W ATX12V V2.2 80 PLUS Certified Compatible with Core i7 Power Supply

(Corsair 400W, 30A on its single +12V rail.)

Free is good, but you (or your relative) might be better served by dropping a modest sum on a newer low-end card rather than trying to use an old high-end one. (There are Radeon 5XXX series cards for less than $50, which support DX11, pointless though that may be.)
My System SpecsSystem Spec
10 Jun 2010   #3

windows 7 Ultimate 32bit & 64bit
 
 

hm, ok thanks for the info! money is a factor, but i didnt realize psu are that cheap now. i will let them know, thanks again.
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