7870 crossfire PSU recomondation

[urbanail]

I have an ASUS HD 7870 and I was thinking of adding another in crossfire, my concern is my PSU. I have a Corsair 650TX. Will it be enough to power both cards? Any other reasons/concerns about crossfire?

Thanks, JD

Asrock extreme 4
Intel i5 3570k
Corsair 650tx
8gb ram 2x4
ASUS HD 7870
HAF 912

1x 200mm fan
4x120mm fan
1x dvd drive

 

[bystander]

The other concern is micro-stutter:
http://www.tomshardware.com/reviews/graphics-card-benchmarking-frame-rate,3466.html
http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-GeForce-GTX-660-Ti-and-Radeon-HD-7950

For your PSU, fill this out, it should make it clear what you need, and might be worth adding a little for security.
http://www.thermaltake.outervision.com/

 

[splinter007]

I would recommend at least an 800w power supply. Somewhere between 750-800 should be good.

 

[jemm]

A 600W power supply, with four 75W 6-pin PCI Express power connectors is enough to power 2 HD 7870 -- I am not sure, but your PSU has only 2 75W 6-pin PCI Express power connectors.

As you have an unlocked CPU, which means you can overclock it (if you haven´t done so yet) then you may need extra wattage -- perhaps a 750W PSU, if you are into serious overclocking.