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Sapphire HD 6970 Crossfire question - Page 2

post #11 of 25
Quote:
Originally Posted by Ken1649;15429942 
Please break it down how much do you think an overcloked 6950 is drawing power? And an i7 2600K @ 4.5 Ghz?

Let's put the complexity of pride a side.



I don't need to break it down... My system was drawing 760 watts from the wall outlet (and I was only running 2X 6950)and my PC couldn't handle it and crashed... You tell me why it should/would be otherwise???

For 2X 6970 OC'd and an overclocked sandy, you'll need 1000W

Convince (prove to) me otherwise! wink.gif
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post #12 of 25
Nevermind what you think. Should people ask nicely, folks here will be more than happy to explain smile.gif

If I think you are in anyway dangering your system I should call you out.
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post #13 of 25
Quote:
Originally Posted by The Doc;15429985 
I don't need to break it down... My system was drawing 760 watts from the wall outlet (and I was only running 2X 6950)and my PC couldn't handle it and crashed... You tell me why it should/would be otherwise???

For 2X 6970 OC'd and an overclocked sandy, you'll need 1000W

Convince (prove to) me otherwise! wink.gif

I don't know about a 1000w PSU. From my own experience with dual PCI-E powerd cards (1ea 5970 and 1ea 5870), an i7 980x CPU with a 130W TDP, 6 HDDs (2ea SSD in RAID 0, 3ea 1.5Tb storage and 1ea hot swappable), a Xonar DX sound card requiring additional power and 8ea case fans running off a speed fan controller, I've been able to use my 850W PSU without a single issue.

OP, here is a nice PSU calculator you can check out:
http://www.overclock.net/power-supplies/1140534-psu-calc-final-release.html
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post #14 of 25
Pretty sure my system is running 2 of those on a 750w PSU just fine so why can't he do it.
Don't forget about efficiency. Your psu can pull way more from the wall then whats its rated at.
A mild OC and water cooling on my system only pulls an average of 550watts when running boinc.
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post #15 of 25
Thread Starter 
Quote:
Originally Posted by ericeod;15430026 
I don't know about a 1000w PSU. From my own experience with dual PCI-E powerd cards (1ea 5970 and 1ea 5870), an i7 980x CPU with a 130W TDP, 6 HDDs (2ea SSD in RAID 0, 3ea 1.5Tb storage and 1ea hot swappable), a Xonar DX sound card requiring additional power and 8ea case fans running off a speed fan controller, I've been able to use my 850W PSU without a single issue.

OP, here is a nice PSU calculator you can check out:
http://www.overclock.net/power-supplies/1140534-psu-calc-final-release.html

Thanks for that PSU Calculator! I added all my system components in and came back with a requirement PSU of 690. So I'm in luck! Excellent help from many of you and lots of great reply's. Great community. Thank you smile.gif
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post #16 of 25
to the op YES it will run it fine and you can oc as well.
i have the antec tp 750 new running 2 unlocked and oced 6950's at 1000/1400 and a overclocked x6 at 4138 and the psu has been fine for the past 8 months the only thing is the fan can be a little noisy at times
also with all that with a load killawatt reads 802 watts
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post #17 of 25
Quote:
Originally Posted by Nillus;15425997 
Hey Overclockers,

I recently purchased a Sapphire HD 6970 and am loving it! I'm just wondering if an Antec ATX TruePower 750W Blue would be enough to run the Sapphire 6970 Crossfire. I'm currently running an i7 860 LGA1156 at standard clocks.

Thank you smile.gif

With your PC setup it'll work just fine so you have nothing to lose if you go for CFX on the 6970's smile.gif

My 850W can run CFX (Tried when I borrowed a friends card) and it ran flawlessly on my system smile.gif

the 100W difference shouldn't really be noticeble unless you add alot of fans and/or other things to your system. Happy gaming man smile.gif!
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post #18 of 25
A 750 Watt PS will easily run that system @ stock clock.... try to overclock and see if I was right wink.gif
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post #19 of 25
Quote:
Originally Posted by The Doc;15429985 
I don't need to break it down... My system was drawing 760 watts from the wall outlet (and I was only running 2X 6950)and my PC couldn't handle it and crashed... You tell me why it should/would be otherwise???

For 2X 6970 OC'd and an overclocked sandy, you'll need 1000W

Convince (prove to) me otherwise! wink.gif

I think something else was wrong with your system then. 760w from the wall @ 80% efficiency is 600w from the PSU.
post #20 of 25
Quote:
Originally Posted by Eggy88;15431943 
I think something else was wrong with your system then. 760w from the wall @ 80% efficiency is 600w from the PSU.

I think he is overclocking CPU & GPUs with extreme cooling LN2.

He invented/designed/built waterblock so I don't think he could be wrong though wink.gif

http://www.overclock.net/15430496-post6.html
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