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Old October 10, 2011, 04:33 PM
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Hey guys, I have i7 2600k clocked at 4.5ghz at 1.36v. Is a AX850 good enough to SLI GTX 480's?
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Old October 10, 2011, 04:55 PM
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Should be plenty of power.
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Old October 10, 2011, 07:21 PM
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I say its fine as well.
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Old October 10, 2011, 07:40 PM
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Yes you have lots there, should be no issues.
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Old October 11, 2011, 12:43 PM
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the AX 850 can do a fair bit above it's limit but you are bumping up close to max there especially with the OC 2600K. Are the 480s overclocked? Do you use them to crunch/Fold? What else is in the machine?

If they are stock 480s I'd put your max consumption (full load) with a couple drives at just under 800 watts...not the most efficient but well within the AX 850's limits.
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Old October 11, 2011, 12:50 PM
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Quote:
Originally Posted by Razamatraz View Post
the AX 850 can do a fair bit above it's limit but you are bumping up close to max there especially with the OC 2600K. Are the 480s overclocked? Do you use them to crunch/Fold? What else is in the machine?

If they are stock 480s I'd put your max consumption (full load) with a couple drives at just under 800 watts...not the most efficient but well within the AX 850's limits.
Sandybridge Processors use almost nothing for power compared to older Core 2s. With a 850 you'll have no issues whatsoever on that system even if the processor is overclocked.
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Old October 11, 2011, 12:56 PM
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The 1366 socket uses more power then SB when overclocked, though so does the 480 compared to the 580. From this and my own personal experience I would highly recommend going up to a 1kW power supply if you plan to overclock everything.

At 1.375V vCore + 580s rather heavily overclocked themselves they can pull more then 950W from the wall.
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Old October 11, 2011, 01:03 PM
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The 1366 socket uses more power then SB when overclocked, though so does the 480 compared to the 580. From this and my own personal experience I would highly recommend going up to a 1kW power supply if you plan to overclock everything.

At 1.375V vCore + 580s rather heavily overclocked themselves they can pull more then 950W from the wall.
Uh.. he's running a i7 2600k silly boy.
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Old October 11, 2011, 01:11 PM
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To give you some idea; my 850W Seasonic powers 2x480's, 2600k@4.7 (1.45v), 2 pumps, 10 or so fans, and some lighting.

While running f@h on the gpus and -smp 7 on the cpu (90%)...draw is right around 700W.
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Old October 11, 2011, 01:40 PM
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Yah, it probably would not cross 850 Watts, I hate running up to the edge of my PSU ratings though. Corsair says 950+ for that configuration.
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