Will this power supply be adequate for two 5870's in crossfire?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817153106

Eventually I would like to add a second graphics card. I'm not even sure if I will be getting a 5870 for my build but it is very likely. I'm assuming this would not be adequate for two 480's in SLI because of their ridiculous power consumption.

Yes the psu is enough for 5870 in xfire. And its plenty for GTX 480's in sli also. People over do the heat+power bit for the GTX 400's

You can run SLI'ed GTX 480's on a good 750w PSU.

Thanks. I'm definitely buying this psu then. It will only be $80 after the mail in rebate and the promo code.

Yes the psu is enough for 5870 in xfire. And its plenty for GTX 480's in sli also. People over do the heat+power bit for the GTX 400's

You can run SLI'ed GTX 480's on a good 750w PSU.

04dcarraher

Oh really? Because the graph SMC posted proves you wrong.

what about two 5830s in xf on a 700w psu would that be ok?

[QUOTE="04dcarraher"]

Yes the psu is enough for 5870 in xfire. And its plenty for GTX 480's in sli also. People over do the heat+power bit for the GTX 400's

You can run SLI'ed GTX 480's on a good 750w PSU.

Oh really? Because the graph SMC posted proves you wrong.

A rate can be made based on the average of the total power consumption of the card. If you factor in the margin of error to that estimation (which seems to be large considering graphs such as the one above), then a 750W power supply would be pushed close to, or even past, its limits at certain points by using GTX 480 in SLi. Here are two other reviews that show that the GTX 480 can very well surpass that 300w threshold. Hexus, techPowerUp.

Overall, GTX 480's in SLi may run on a 750w, but you run the risk of degrading your power supply faster than usual.

I agree with you with Hexus, but Techpowerup's chart for maximum power draw is solely for the video cards only. Just look at the readings of the other cards on the same chart.

Referring to the Hexus review for PSU stress, when the example rig requires 710w for the entire rig, and considering the majority of 750w PSU's are rated at 60A on the 12V rail (720w), that is extremely close to what the PSU can handle. I personally would not feel comfortable leaving such a small cushion of power within a PSU.

I agree with you with Hexus, but Techpowerup's chart for maximum power draw is solely for the video cards only. Just look at the readings of the other cards on the same chart.

Referring to the Hexus review for PSU stress, when the example rig requires 710w for the entire rig, and considering the majority of 750w PSU's are rated at 60A on the 12V rail (720w), that is extremely close to what the PSU can handle. I personally would not feel comfortable leaving such a small cushion of power within a PSU.

The GTX 480 cant exceed the PCI-e power limit of 300w which is pci-e slot 75w, 6pin 75w, and 8pin 150w.04dcarraher