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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 190

post #1891 of 38701
Quote:
Originally Posted by lothar View Post

If computer is shutting down, you have too weak power supply, try connecting 8-pin connector to 18A line at least

Yes, I am starting to think that my PSU may be the problem. I have another PSU to try it out. I'll update.
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post #1892 of 38701
Demin-187,

I heard that MSI AB can 7970s at different speeds, but is it better to run them at the same speeds? I ask because my first card OC's pretty decently, has a default VID as 1.05 and I'm wondering what if my second card that's coming suck balls? If say my second card can't OC past 1050mhz, should I run them both at 1050mhz? Or run one at 1125mhz and the second at 1050mhz or is there no real world difference?
post #1893 of 38701
Quote:
Originally Posted by WiL11o6 View Post

Demin-187,
I heard that MSI AB can 7970s at different speeds, but is it better to run them at the same speeds? I ask because my first card OC's pretty decently, has a default VID as 1.05 and I'm wondering what if my second card that's coming suck balls? If say my second card can't OC past 1050mhz, should I run them both at 1050mhz? Or run one at 1125mhz and the second at 1050mhz or is there no real world difference?

Yeah they're able to run at different clock speeds although the work load becomes in-balanced but the setup should still yield positive results.
I'll do a test right now see how it goes.. thumb.gif
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post #1894 of 38701
Quote:
Originally Posted by Denim-187 View Post

Guess who just took first place....................................from guess what system ?
Quote:
CallsignVega ---- i7 990x @ 4.83 Ghz ---- Quad-SLI 3GB GTX580 (1020/2200/2040) ---- 126.32 FPS
CallsignVega, did you just got wiped of the 1st place podium ?
Metro 2033 benchmark thread - http://www.overclock.net/t/817064/metro-2033-benchmark-thread-using-official-tool/0_30
And.. here...is.... mine 129 FPS baby yeahhhhhhhh !! aarambo.gif
338
These two 7970's just put 4x 3gb 580's in their back pocket i believe ? WOOP... And people say theyre not much better than 580's lachen.gif

My 4x GPU setup was severely CPU limited running Metro at a measly 1080p, just as 4x 7970's will be. Hence why the second place score with 3x 580's clocked much lower than mine were only 5 FPS slower. Take a look at page one of that benchmark thread. My GPU's were under 60% utilization through the benchmark, so that doesn't mean 2x 7970's are as fast as 4x 580's, just Like Levesque's 4x 7970's will be severely hampered and produce only a few more FPS. wink.gif


Two cards just get the chance to be maxed out. thumb.gif
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post #1895 of 38701
Thread Starter 
Quote:
Originally Posted by WiL11o6 View Post

Demin-187,
I heard that MSI AB can 7970s at different speeds, but is it better to run them at the same speeds? I ask because my first card OC's pretty decently, has a default VID as 1.05 and I'm wondering what if my second card that's coming suck balls? If say my second card can't OC past 1050mhz, should I run them both at 1050mhz? Or run one at 1125mhz and the second at 1050mhz or is there no real world difference?
CrossFire will always run at the slowest clock speed at card is set at.
So yes, you should be running the highest stable clock speed you can get on all card in CF.
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post #1896 of 38701
Just installed my Koolance block.

OC'd it to 1250Mhz.

Ran furmark and I'm getting max temps of 43 degrees. yay biggrin.gif
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post #1897 of 38701
Quote:
Originally Posted by Denim-187 View Post

Oh didnt see Levesques score in Metro2033... Seems like there's a CPU bottleneck somewhere there with four monster GPU's
Who would of thought tongue.gif

Starting to wonder if I should even wait for the 7990 to add to my 7970 then... maybe just go ahead and order another 7970 and just do xfire? hmmmmmmmmmm decisions!
    
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post #1898 of 38701
383
379

This is with DOF enabled this time, to stress them more for clearer results.
The workload balance seems to gear around the lowest clock. So having a higher clocked card just as penguin stated will do no good.


And yeah CallsignVega, i noticed that a little while after the glory lol. We need more CPU powah noww !


Quote:
Originally Posted by MrWhiteRX7 View Post

Starting to wonder if I should even wait for the 7990 to add to my 7970 then... maybe just go ahead and order another 7970 and just do xfire? hmmmmmmmmmm decisions!

Crossfire is BEAST atm, DO IT !
Edited by Denim-187 - 1/25/12 at 12:55am
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post #1899 of 38701
Thanks Demin, +1,

Now I hope I don't get a crappy second card =[
post #1900 of 38701
I thought in crossfire both cards have to set to same clock speed? Or do I missing something?
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