Can my PSU handle 2 x 5770?

Hi folks, just wondering if someone could tell me if my current PSU (OCZ modxstream pro 600w) would be able to power 2 5770's in crossfire?

On the box it has Sli compatible but there isno mention of Xfire.

Thanks

 

IIRC...

Running 2no 5770's consumes:

109w idle
324w load

So to answer your question.. In theory your power supply should be sufficient, it all depends what other components/peripherals you have too.

 

Thanks for the speedy response,

In my system I have
i5 quad cpu - stock cooler
4gb ddr3 corsair dominator
4 case fans
dvd rw
1tb hdd
wireless keyboard/mouse
external 1tb hdd
wireless 360 receiver
at the moment 1 xfx 5770

I think thats it, do you think I would be better upgrading the PSU?

Also, does the fact there is only mention of sli and not crossfire not mean anything?

Cheers, Mambo

 

No problem my friend.

I'd imagine you would be fine with that PSU for now tbh.

SLI is the term Nvidia use & Xfire is the term AMD use, same thing really.

If you want to check how much power your system is likely to use then I highly recommend:

Enermax Power Supply Calculator

Should give you an idea of exactly how much power you're going to be using.

 

Cool, cheers buddy, I will try the calculator thing the now better safe than sorry

Thanks again

 

Happy to give advise my friend.

The calculator is very handy for when you want to add things, I even ran it to ensure my system will cope with the GTX580

 

Ran the calculator and it came back with 620w.....

Nothings ever easy

 

The calculator will always state the recommended power allowance.

My best advise is to try the Xfire and see how the system runs as you would normally use it.

If you witness system instability then you know that the power supply needs upgrading.

Edit: I ran the calculator myself for my system and it said I needed 920WATTS - I'm running a Corsair HX850 with no problems.

 

I have heard that they over compensate to be on the safe side, but i would rather not be running at its max aswell.

I suppose if i do end up getting a second card i can try it like you say to see what stability is like, and if i need to upgrade i can always use this psu for a new next project, (the wife starts to weep) lol

 

That's what I would do, I have no plans on upgrading my PSU until I upgrade my i7 rig when the next worthwhile incentive comes along.

If I keep upgrading i'll be able to supply a medium sized company with computers for their office

 

Although th 5870 is on the today only for £220 minus £70-80 for my 5770 and the £70-80 for a new 5770 means £70 for a brand spanking 5870 in my insane logic

 

It makes perfect sense to me

I only wish the 6990 had come out when it was supposed to, ended up putting the GTX580 on my Christmas list instead

 

Job done, 5870 ordered 5770 going to new home lol

Cheers for pushing me over the edge there

 

Good man, i'm sure you'll love it.

I've not been a PC Gamer since the days of Delta Force but i'm hoping i'll get back into it

 

yeah got to say, untill a few months ago pc gaming meant nothing more than football manager to me, lol.

was very impressed with my 5770 so im sure i will love this one even more

Thanks again for all your advice mate

 

No problem buddy.

Let me know if you come accross any decent games when you fire up your new card

 

will do