will a Corsair 550vx run 2 3870 in crossfire?

[bucsmaniac]

Hi guys, i have a 550vx and a 3870 and would like to know if anyone has used this PSU in crossfire.

 

[samuraiblade]

should be ok , the ati cards arent too demanding powerwise afaik

 

[Andrius]

It largely depends on the rest of your system. With an overclocked quadcore, x48, 2 harddrives and 2 dvddrives I would recommend a 750W PSU (PC Power & Cooling 750W Silencer, Corsair TX 750W).

The short answer:
The Corsair 550W is a bit slim but if you have a basic system otherwise IE 1HDD and 1DVD with stock 65W dualcore it should be enough.

The long answer:
The HD 3870 is rated as a 96W card. It has 1 PCIE power connector (150W theoretical maximum).
65W for the CPU, 50W for the motherboard and 20W for RAM
15W for 1 harddrive and 20W 1 dvddrive, and 30W for fans (in case you have many).
65+50+20+15+20+30+200 ~= 400W

(On a side note a 550W PSU is recommended for HD 3870 X2 without overclocking).

 

[evongugg]

Your PSU has 41 amps on the 12v rails. You are fine.

AMD recommends the Corsair 620W:

AMD Certified PSUs (Single+Crossfire):
http://ati.amd.com/online/certifiedpsu/index.html

 

[Shadow703793]

^+1

 

[samuraiblade]

keep in mind also the corsairs are rated at 50'c , there stonking psu's hence why i got one after my hiper 700w went bang 😛 , the caps on them are awesome and stability is one of the best too , i think there power rating is very moderately quoted.

 

[bucsmaniac]

Thanks for all your help...now i just have to talk my wife into buying me another 3870...LOL

 

[The_Blood_Raven]

Jeez your wife buys you PC components? Lucky man.