Going Xfire

[thesupermedium]

Okay, so I have one XFX 4870 1GB, and I'm looking to put another in my system. I'm running a cooler master 600W with a Phenom II 955, 4GB of Corsair Dominator, a WD 640GB black HD and one DVD drive. Sorry if this may be obvious, but do I need a new PSU to Crossfire two 4870s? I've read posts by some saying I need 800w, and some saying they havent seen theirs peak about 500w. I really just need to know If my wattage will be okay, I have two 6 pin cables, and two 4 pin to 6 pin adapters, so that won't be a problem. If I should upgrade, what PSU should I get?

 

[redwave3099]

I'm running two sapphire 4870's on this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006.

before that I used a 750 watt ultra that had a 45a on the 12 rail and it ran it but if i overclocked (my 720 PH II X3) and cards I would have crashes.

 

[thesupermedium]

Well, I have no need of overclocking for the time being, and if need be, I'll just drop by Micro center or Newegg and pick up a 750W corsair. So a 600W would run fine then you think? From what I understand, Cooler Master makes good products.

 

[redwave3099]

which coolmaster do u have:
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&Description=cooler+master+600W+&x=14&y=32

Or is it some other model?

 

[thesupermedium]

It's the one on the top, the 600W Modular.

 

[redwave3099]

well its only got a 12 rail of 40a (total of 480w)and that is lower than what I had on the ultra (45a total of 540w) I would say you could try it but with only 40a it maybe cutting it close. If you had something like this
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005
it would probably work better because of the higher rail.

P.S.(besides the overclocking factor, the system seemed to run a lot hotter that it should with the ultra.)

 

[thesupermedium]

Ahh, I looked at that one, and decided against it in my initial build because it wasn't modular. Would their 620W modular version be good enough you think?

 

[redwave3099]

Probably if u must have modular but I would just rather get the 750 to be on the safe side it give you more head room in the long run.

 

[thesupermedium]

Okay, well, I'll wait a little while on the upgrade then seeing as it will cost around $100 more. Thanks for the advice!