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7970 Xfire Overclocks

I

inglewood78

[H]ard|Gawd
Joined
Aug 25, 2004
Messages
1,465
Just wondering what people with 7970s in xfire are oc'ing at. I know running in xfire limits your overclock and it takes me almost 1.250v to hit 1200core. I can run 1125 at stock clocks but it needs a lot of volts to move from there.

What's your 7970s oc'ing at?
 
My first 7970 was able to hit 1250/1600 but after adding a second one, I was only able to get 1125/1575 on both. No biggie, since even at stock clocks it demolishes everything except benches.
 
So far looks like 1200/1750 at 1.225v for my Quad 7970s. Though i can bench at 1750Mhz on the ram if i go to 1800 it hard locks.

I'm gona run it at 1200/1600 to play it safe at 1.225v.

Water cooled i should add.
 
eclypse said:
So far looks like 1200/1750 at 1.225v for my Quad 7970s. Though i can bench at 1750Mhz on the ram if i go to 1800 it hard locks.

I'm gona run it at 1200/1600 to play it safe at 1.225v.

Water cooled i should add.
Click to expand...

I know we are on very early drivers, but hows the scaling going from the third to the fourth card?
 
Very hard to tell atm since i cant play BF3 maps with 4 cards without crashing. 3 cards are a go. Can play Karkand maps though with 4. Will try it out tonight with 3 and then 4 cards on the same map.

haha thats the other prob testing this game out in MP.. getting on the same 64 player server for tests is ruff as its so freakin packed out there! :)
 
Thanks for the tip on the memory voltage.. notice that if one can flash there 7970 to a asus bios then one can use the Asus GPU tweaker to increase the memory voltage.. Buggy program but i have it runing no issues now at 1200/1800Mhz on the ram with 1650v for the memory. :)

Newest 3Dmark11 just finished and i scored P26720! :) Sweet. Afraid to go higher haha.
 
I recently got a couple of MSI 7970s. At stock voltage I can do 1100/1575. Although I can't seem to do better even if I increase the voltage. I guess one of them just can't handle it. Not like these clocks, especially at default voltage, are bad. So I'm not losing any sleep over it.
 
eclypse said:
How would do that as i dont see any option for mem voltage in AB or CCC.
Click to expand...

6cf74b77_629e5b0d_yVs1N.png
 
LOLOL!!! GOD... Feel like a looser after that!

Unbelieveable.. When did AB put that there? Never seen a mem voltage control in AB even when i was using the GTX580s.

Crazy! haha
 
For your video card, Unwider added it a few weeks ago. So whats your new memory, 1900?
 
1800 at the moment but since its freakin too stable and artifact free i'll have to go for more soon. Playing BF3 right now.. love it with 3 cards! Hopefully they will fix the prob with Quads in the new patch coming out at 8am. Though 3 is flipping insane right now with this overclock! haha.

THANKS!
 
I use this in crossfire

1162 gpu, 1700 memory, +100mV in msi afterburner, 50% manual fan

works like a champ ;)
 
eclypse said:
1800 at the moment but since its freakin too stable and artifact free i'll have to go for more soon. Playing BF3 right now.. love it with 3 cards! Hopefully they will fix the prob with Quads in the new patch coming out at 8am. Though 3 is flipping insane right now with this overclock! haha.

THANKS!
Click to expand...

Yea no prob man, lookin forward to an update on your memory oc
 
Higest i can get the mem is 1900 at 1700mv on the memory. Thats the max the voltage goes in AB. Seemed fine durring benches but i did see some flashing textures in BF3 on one Karkand map so i changed it to 1850Mhz and 1680mv i believe and it was fine in BF3. :)

I did try 1900Mhz at less then 1700mv and i believe it just locked up.

Running 4 cards so i'm gona be limited to the weakest link.. I will mess around and see if i can up the core more from 1200 but really would like faster mem since i'm runing eyefinity.

Just gota write everything down cause the cards will downclock if you push them too much so faster settings will end up being slower.
 
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