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Power Supply enough for SLI GTX275?

Last response: in Graphics & Displays
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May 29, 2009 3:45:54 PM

Hey guys

just a small question need to ask since i returned my leadtek GTX260 Extreme+ which had this problem, i decide to get the asus GTX 260 Matrix but its TBA. So dun think i can do anything about it unless it comes to stock but in the meantime im going to wait about a week to see if stock comes in. If not then im off too GTX275 if my psu handle it

so theres a Asus GTX275 for about $400 AUD.

but im wondering if my power supply can run it in sli coz i dun want to get a new power supply.

my comp specs are
Q6600@ 3.0GHz with freezer extreme
2GB 800 ram
Asus P5N-D
(TX750 corsair power supply)
Antec P180 case with 2 120mm fans
500GB samsung hard drive 7200rpm
500GB seagate hard drive 7200rpm
NO GFX YET.

Thanks for replys.
May 29, 2009 3:52:22 PM

ur cpu will bottleneck those cards.
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May 29, 2009 4:08:28 PM

Yes, you'll have enough power.
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a b U Graphics card
a b ) Power supply
May 29, 2009 4:50:09 PM

His CPU is OCed to 3.0GHz, it'll be fine. As for PSU, he is cutting it close.
I'd recommend a 850watt PSU just to be safe, since the GTX275 uses almost as much power as the GTX280/285, and he has 2x HDDs and OCed CPU
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Best solution

May 29, 2009 6:40:08 PM

http://www.tomshardware.com/reviews/geforce-radeon-powe...


GTX 280 SLI uses about 320 watts. I don't think the rest of his system is going to consume more than ~150w, which would put him in the 450-550 watt range. This is within the comfortable range of the corsair 750w.


http://www.anandtech.com/video/showdoc.aspx?i=3539&p=22

Here we have a core i7 965 (130w CPU) and a 4870x2 pulling 421 watts at full load. According to tom's article above, gtx 280 sli uses about 50 more watts than a 4870x2 while gtx 260 sli uses 100 more. From this review it looks like the gtx 275 uses about as much as a gtx 280. If we add 50 watts to the 421 watts from the anand system, we'd get ~470. The OP's CPU might use a little more than the stock i7 (a Q6600 is 95w at stock), and a 2nd hard drive won't be a whole lot more either. Other than that, the systems are pretty similar.

I still think the OP's current PSU will be sufficient. Won't be able to add much more to the system though...
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