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Trifire 7970's...1050w Enough? - Page 5

post #41 of 65
http://www.newegg.com/Product/Product.aspx?Item=N82E16817207020&Tpk=xfx%20power%20supply
Its a seasonic rebrand....


but phaedrus2129 has spoken..............


problems solved
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post #42 of 65
I will jump on the 1050W is enough brigade.

700

This was there test system:

307

4.7 GHz i7 3960X EE on power hungry X79 system. That should be good comparison with your proposed X79 build.
post #43 of 65
Thread Starter 
Quote:
Originally Posted by Riou View Post

I will jump on the 1050W is enough brigade.
700
This was there test system:
307
4.7 GHz i7 3960X EE on power hungry X79 system. That should be good comparison with your proposed X79 build.

But note the AX1200. I don't think running a power supply at 9/10 capacity for 5 hours a day is the best thing to be doing. If I sell the PSU, I'll get a 1200, otherwise, I'll stick with the 1050. Or maybe somebody could explain why dual PSU is bad?
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post #44 of 65
Quote:
Originally Posted by SammichThyme View Post

That's the general reaction. I've got dual right now and I get about 40fps with AA turned off. (eyefinity) The scaling at this point in time is miserable, but will get better as newer drivers come out. I want this rig to last me 4+ years, 2 of which I'd like @ max settings. Plus I have money, and lots of it.

Can you toss me some? Or at least some of your old tech that you don't need lol...
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post #45 of 65
Quote:
Originally Posted by Riou View Post

I will jump on the 1050W is enough brigade.
700
This was there test system:
307
4.7 GHz i7 3960X EE on power hungry X79 system. That should be good comparison with your proposed X79 build.

789 is less than the listed tdp of each card individually. Ok...
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post #46 of 65
I really care about these full 3Way / 4Way tests in terms off power consumption. Quite often they come out with very low numbers. As tsm says 789w is LOW for a 3-Way Crossfire 7970. Think of it..
210 per card (tdp) alone adds up to 630w, that leaves 160w for a 3960 @ 4.7Ghz and the rest of the system. In almost all of the "full 3-Way / 4-Way Crossfire they don't say anything about Power Tune. As i said earlier Power Tune 20% can easily add 50-60w per card. Also as said above they use clean test rigs with no fans, pumps, harddrives (in addition to OS drive), Cold Cathodes. Only the gpu's, cpu and a hdd or ssd.

It could be that a good 1050w is enough for a 3-Way Crossfire with 7970's, but i would not gamble on it. There are to many factors that these test don't take into account that you quickly forget about. All i know for a fact is that i see about the same numbers as they do when i game @ low overclocks and with Power Tune 0%, ~750w but as soon as i start hitting the gpu's with 1.3v, turn up power tune and the cpu i get close to 900-950w most of the time with peaks @ close to 1100w. That beeing said i have a lot of other things in my system that quickly adds up, but i also have a 2600k and you are talking about moving to 3930..

Just my everyday spam1.gif
post #47 of 65
Ive had my 2600K @5.1GHz and my 6990+6970 Tri-Fire @950/1375 all on my Cooler Master Silent Pro Gold 1000W with no problems thumb.gif
post #48 of 65
Too many people getting hung up on TDP in here. The 1050w will do the job, however if it makes you pucker like you're about to jump off a cliff, then just buy the bigger one and join the rest of us with PSU's more capable than we need. At the end of the day, its your rig and only you can decide what you're comfortable with, we can only advise.
post #49 of 65
in pretty much all these dual/triple card setups, two cards run together usually always use less power than what a single card would run x 2, and the same with 3 cards. i dont know, maybe its something to do with imperfect gpu scaling? in any case, games arent very malicious on power consumption compared to stress tests so im not surprised that their pull doesnt stack up to their rated tdp

peaks or even constant 1100w is perfectly fine for a 1050w unit (a decent one that can actually do 1050w that is tongue.gif) generally decent power supplies have no problem running a little bit above their rated wattage, at least until they hit their protection systems
post #50 of 65
Thread Starter 
Well I've been looking around and it seems like my best option is snag a 400w PSU and throw a card and a few other little things on it and get on my way. If my 1050 sells on eBay, I'll get a bigger PSU for the same money. Lian Li makes a dual PSU adapter for about $7
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