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is 600w enough for a crossfire setup?

T

The Mailman

Senior member
amd AMD2 setup with a potential crossfire setup in the future (at least thats what im preparing for)

just want to make sure....600w is enough, right? or am i in trouble and need 750w?
 
Not if it's 100W on the 12A rails and 500W on the 3.3 and 5V rails.

Important thing is the 12A rails combined (or single 12A rail) output needs to be in the realm of 250 to 300W. A good 450 to 500W PSU ought to be plenty.
 
Depends on the Crossfire cards.

If it's a pair of X1900's, then the answer might be no depending on the power supply.
 
Originally posted by: The Mailman
amd AMD2 setup with a potential crossfire setup in the future (at least thats what im preparing for)

just want to make sure....600w is enough, right? or am i in trouble and need 750w?
Click to expand...

you need a good quality 500-600W - enhance, fsp, seasonic, enermax, etc
 
if you have two x1800's then a 500w psu should be sufficiant assuming you don't have a jubilee of hard drives... other than that, I'd stick with a 600w, a good one to check out is the ocz gamexstream 600w found here. It has 4 12v rails rated at 18a each for a combined total of 35amps. More than enough for any xfire setup. It's a vg value as well.
 
Yea, I'd be welling to bet that it is enough. Say those cards use 100W tops, you're looking at 9A into each card. Now, you'll have other devices drawing current from that 12V line, so getting a supply with a solid 12V line (say 36A) should be good. There are power supplies in the 500-600W region that will do that.
 
Originally posted by: Royicus
Yea, I'd be welling to bet that it is enough. Say those cards use 100W tops, you're looking at 9A into each card. Now, you'll have other devices drawing current from that 12V line, so getting a supply with a solid 12V line (say 36A) should be good. There are power supplies in the 500-600W region that will do that.
Click to expand...

not sure what line the V comes in on for a gpu but my x1800xt utlizes ~30A when under full stress...just as a guidline

op - just mak sure you get a good brand psu, add pc&p to the lstt too.
 
Only the brand and quality of the unit matters, the rated wattage is reletively meaningless. Even the more detailed aps-per-rail ratings are meaningless if you assume all but the best brands simply lie about it.

I would much rather use a 300W PCP&C than a 600W no-name $20 unit.
 
Originally posted by: bob4432
Originally posted by: The Mailman
amd AMD2 setup with a potential crossfire setup in the future (at least thats what im preparing for)

just want to make sure....600w is enough, right? or am i in trouble and need 750w?
Click to expand...

you need a good quality 500-600W - enhance, fsp, seasonic, enermax, etc
Click to expand...


I just bought a Seasonic S12 600w
 
Originally posted by: bob4432
Originally posted by: Royicus
Yea, I'd be welling to bet that it is enough. Say those cards use 100W tops, you're looking at 9A into each card. Now, you'll have other devices drawing current from that 12V line, so getting a supply with a solid 12V line (say 36A) should be good. There are power supplies in the 500-600W region that will do that.
Click to expand...

not sure what line the V comes in on for a gpu but my x1800xt utlizes ~30A when under full stress...just as a guidline
Click to expand...
Could you qualify that with a voltage reading? Because that's certainly not ~360W.
 
I'm hoping 600W does it, I just ordered a crossfire card today 🙂
I have an enermax 600W silent II

*prays*
 
Originally posted by: Howard
Originally posted by: bob4432
Originally posted by: Royicus
Yea, I'd be welling to bet that it is enough. Say those cards use 100W tops, you're looking at 9A into each card. Now, you'll have other devices drawing current from that 12V line, so getting a supply with a solid 12V line (say 36A) should be good. There are power supplies in the 500-600W region that will do that.
Click to expand...

not sure what line the V comes in on for a gpu but my x1800xt utlizes ~30A when under full stress...just as a guidline
Click to expand...
Could you qualify that with a voltage reading? Because that's certainly not ~360W.
Click to expand...

i just woke and am not sure the exact V but i am assuming 1.2-2V, not more, definately less than 100W i would say. the card does put off a good deal of heat, reaching 90C according to it onboard temp sensor and still being perfectly stable.
 
depends. you could find a 600W cheap PSU that wouldn't even power on that system. make sure that the combined 12 line provides atleast 25A if not more.
 
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