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How do I overclock in crossfire?

post #1 of 12
Thread Starter 
Ok, maybe I'm missing something really obvious, but right when I click apply settings in MSI AB or Trixx I get an immediate BSOD.

No matter what I set the clocks/volts to, it freezes and crashes on me.

This doesn't happen when using AMD overdrive in CCC.

So...how do you overclock?
post #2 of 12
Disable ulps.
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by tsm106 View Post
Disable ulps.
Just did that, and will restart and try it one more time.
If this fails I'm getting rid of crossfire.
post #4 of 12
and disable the sync option in msi ab you could be apply clocks to a card that cant handle them.
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post #5 of 12
Thread Starter 
So now, it doesn't BSOD on me, but I can only get 870/1175 on each card in crossfire as opposed to the 970/1250 I was able to get on each card individually.

In addition, in my short test run of BFBC2, my fps is higher than a single card config, but it feels noticeably more laggy and stuttery. A single card feels smoother despite the fps being lower. Or is it really lower?
post #6 of 12
Thread Starter 
Still can't get any overclock higher than 870/1200 at 1.2v...anytime I try I get a hard crash and CFX automatically disables itself.

And now I'm also having issues with fan speed control..
post #7 of 12
I used registry hack to overclock my cards in crossfire. MSI AB is a pain to overclock with in crossfire. It works, but everytime you reboot, the overclock does not apply to second card AND it also makes the second card stay in 100% load.
Registry hack works great for me. Increased CCC limits for clock to 1600 and memory to 2500. Overclock galore. I did not mess with voltage, but if I did, I would use RBE to set some voltages in BIOS.

EDIT: Read the following thread. It will give you an idea
http://www.overclock.net/ati/966436-...-ab-trixx.html
If you want to overclock using MSI AB, you will not have an 'automatic' overclock per say. You will have to keybind your overclock to a key. And everytime you reboot, you will have to hit that key to apply your overclock. To me, that gets old - so did not go with MSI AB. Good luck.
Edited by Awaz - 3/25/11 at 12:53pm
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post #8 of 12
Quote:
Originally Posted by tsm106 View Post
Disable ulps.
This problem drove me crazy until I did this.
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post #9 of 12
try new msi afterburner maybe i can overclock in crossfire but it seems its tricky what i found works is uninstall drivers use drivercleaner and reload them dont touch ccc and use afterburner to overclock then the clocks will hold on all gpus.
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post #10 of 12
Thread Starter 
I can overclock (with Trixx, I don't like using afterburner), but I can't get the same high OCs I could get in a single card config. Ideas?
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