r7 265 crossfire minimum psu
- Thread starter Math562
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Ironsounds
Champion
- Jul 31, 2011
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Hello... you will need 150 watts per GPU and a Total of 25 amps of +12Vdc from your PS, just for your Video cards.
capt_taco
Splendid
- Aug 5, 2009
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It depends on what else you have in your system, but it does not require a lot. Running an average system (i5, 1 HDD, 4 sticks DDR3, 4 case fans, 1 DVD drive) through a PSU calculator gives 440 watts.
http://extreme.outervision.com/PSUEngine
They only take one 6-pin PCIe connector, so virtually any PSU in the 550-650W range ought to be able to do it.
If this is a situation where you're buying both new, I'd say you're better off going with a single GTX 970. Or even if you already have one and are considering another, you'd probably do better to get the 970 and sell your existing card; they go for close to full retail price. If you can avoid the hassle of Crossfire for a better single card, always go for it.
http://extreme.outervision.com/PSUEngine
They only take one 6-pin PCIe connector, so virtually any PSU in the 550-650W range ought to be able to do it.
If this is a situation where you're buying both new, I'd say you're better off going with a single GTX 970. Or even if you already have one and are considering another, you'd probably do better to get the 970 and sell your existing card; they go for close to full retail price. If you can avoid the hassle of Crossfire for a better single card, always go for it.
I'm currently have a EVGA 600B 600 watt psu. If I set up my config in pcpartpicker it comes out to 523 watts with the 2 R7 265s in crossfire. I have owned the r7 265 since May and was thinking another card would give me a boost. Not sure where I could sell my r7 265 I do have. Seems like it takes forever for someone to see stuff on craigslist! Not sure how ebay totally works. I'm running a AMD 760k APU so I'm not sure a Nvidia card would be the best solution for it. Thanks for all the quick responses
capt_taco
Splendid
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eBay would be the way to go - it's really not hard and will likely sell within a few days. Invest 15 minutes into getting set up with that.
I'd say 600W is still probably enough, although that EVGA 600B is not the greatest unit in the world and that would be a lot of stress on it. You'd be safer with a slightly bigger PSU.
Another benefit with the 970 is that it is pretty low power consumption for a high-end card; you would definitely fit it in under 600W with room to spare.
I'd say 600W is still probably enough, although that EVGA 600B is not the greatest unit in the world and that would be a lot of stress on it. You'd be safer with a slightly bigger PSU.
Another benefit with the 970 is that it is pretty low power consumption for a high-end card; you would definitely fit it in under 600W with room to spare.
capt_taco
Splendid
- Aug 5, 2009
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Yeah, they are about $300. The math I was doing was -
new r7 265: $140 + replace PSU: ~$50 = $190
new GTX 970: $300 - sell r7 265: ($90-100) + don't replace PSU ($0) = $200
And in that case, the single-card setup is going to be better in terms of both power usage and avoiding all of the hiccups that come with Crossfire/SLI.
A *quality* 600W unit could probably handle two 265's in Crossfire, but i don't know if I'd trust a mid-tier one like that EVGA 600B. It's OK, not great. And if buying new, might as well get a 650W model to be sure.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182263
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