6870 Crossfire - Quick Question

[DustyMiller]

I'm thinking of throwing another 6870 into my case to go for a crossfire setup, but will my PSU be upto it.

I am currently running a Q9550 @ 3.5Ghz, with 4Gb Ram, and a couple of HDD's,and a couple of Optical drives. The current PSU is an Antec Truepower 650w.

 

[Kouba]

Yes I reckon it'll be fine mate

 

[Davepen]

What does the psu give you on the 12v rail? (should say on a sticker on the side)

I had a Tagan 580w psu and got a second 6870 but it didn't have enough power :/ it was only running 420w on the 12v rail which wasn't enough. Now I have a OCZ 750w and that has got 630w on the 12v which is more than enough.

 

[DustyMiller]

the antec has 4 12v Rails, two of them can supply 25A on each rails, which is 300w. more than enough for a 6870. So i guess as long as I make sure my loads are spread between the 12V rails properly i'm sorted., keep the CPu on 12v1, and the storage devices on 12v2, which each have 22A (264w each).

correct ??

 

[Cleeecooo]

correct

 

[DustyMiller]

Yay Crossfire 6870 goodnees, and just to be sure a nice new 750W PSU to run it all.

Sweeet.

 

[GTO656]

It will be all good mate.