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Trifire 7970's...1050w Enough? - Page 7

post #61 of 65
Don't run dual PSU. A cheap 400W will be group regulated and will suffer extremely poor v-reg when powering just +12V devices as you describe.


Use the darn 1050W already
post #62 of 65
==^ thank you heart.gif
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post #63 of 65
Quote:
Originally Posted by tsm106 View Post

That's silly low. My trifire 7970 draw 900w on game benches, and over 1100w on synthetic prime + furmark.

This, here we have numbers from a guy that actually has 3x7970. Add in a 3930 instead of the 2600k. It will work, but probably the psu will be running over time @ 110% when your overclocking hard and running synthetic benchmarks, so its up to you.
post #64 of 65
Quote:
Originally Posted by tsm106 View Post

That's silly low. My trifire 7970 draw 900w on game benches, and over 1100w on synthetic prime + furmark.

Power meter looks to be slightly incorrect because of cheap power meters like Kill-A-Watt not factoring APFC very well. Is that 1100w AC or DC? You must have overvolted your 7970s and overclocked it a bunch since you are on water.

1050W DC would still be enough. To be really sure about wattage, you would need something high quality to measure wattage but that costs almost $1k.
Quote:
Originally Posted by Eggy88 View Post

This, here we have numbers from a guy that actually has 3x7970. Add in a 3930 instead of the 2600k. It will work, but probably the psu will be running over time @ 110% when your overclocking hard and running synthetic benchmarks, so its up to you.

I already posted power consumption numbers from Tweaktown running a 3960k overclocked + three 7970.
Edited by Riou - 2/6/12 at 3:15am
post #65 of 65
Quote:
Originally Posted by Phaedrus2129 View Post

Don't run dual PSU. A cheap 400W will be group regulated and will suffer extremely poor v-reg when powering just +12V devices as you describe.


Use the darn 1050W already

This 110%. Stop it with recommending him to go out and waste more money than he needs to. He's got an absolutely solid 1050w unit already that will EASILY power his setup. Now you guys are putting him at risk of killing his rig by using a junk 400w GPU PSU with his 1050w. This is rediculous!

OP:
That 1050w is MORE than enough power. I would COMFORTABLY use my sig rig on a Corsair CX430 if I absolutely had to (with one card). There's absolutely NO reason you need more than 1050w for 3 of these cards. They're really not that power hungry at all.
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Junkyard
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