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Need help with my 5850's plz help

post #1 of 13
Thread Starter 
ok, i have Gigabyte 5850's running crossfire and ive been playing crysis 2 and a half hour in i get a screen with vertical black bars. i can still hear everything running in the background but i can not get the picture back and have to resart my computer to fix it.

the first card is unlocked with ati overdrive and the gpu is clocked at 905MHz and the memory is at 1200MHz.

the second card gpu is at 775MHz and the memory is a 1125MHz

im not sure if its the clocks not being stable (but its overdrive so its not very intense overclock) or if its the temps. i maxed out at 68c on the first card and 58c on the second. but when it crashed it was only at 58c on #1 and 45c on #2 so.... plz help

ps: i have the latest drivers
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post #2 of 13
You could eliminate the overclocking causing the problem by trying it at stock clocks on the cards.
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post #3 of 13
Thread Starter 
well it looks like it was a unstable clock but how can i fix it if i cant control voltage in overdrive and i would like to stay at my clocks and not the stock clocks
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post #4 of 13
Thread Starter 
ok it just happened to me again but this time i was idling at the desktop and i got black bars and its on stock clocks so idk.

could it be that msi afterburner is conflicting with catalyst??? i just ended and deleted afterburner, but do you think that could have been the problem?
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post #5 of 13
Identical 5850's?

With those in CrossfireX don't push a hefty overclock, thats good muscle anyways.
A little overclock would suffice, but when youre doubled up, its more about getting things to run smooth. Make sure your Vsync is on in all games.

Use something like MSi Afterburner to adjust your frequencies.
I had driver issues with my CrossfireX 5770 setup for Crysis 1 in DX9 mode, I had to patch it and run it in DX10. You shouldn't have any issues with Crysis 2 though. Sounds like a driver hiccup or issue with one of the GPU's.
Will they both boot up by themselves and run a display?
Edited by amstech - 3/28/11 at 6:03pm
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post #6 of 13
yea some guys (dont remember the thread) reported that AB and ccc messed up with each other. I really would try it without AB. Try the max ccc gives you 900/1200 which isn`t that bad. If the problem happens again, then ???
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post #7 of 13
Thread Starter 
yes they both boot up fine and they are identical. but the second gpu is in standby mode until the first one is under load then it kicks in. idk if thats what its supposed to do. also could it be my crossfire bridges because i just ordered the 100mm(4 inch) ones so i could separate them more and get better temps. also the second card is in a PCIe x16 slot but it only has a max bandwidth of x8 and the first one is in a x16 could that cause it too?
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post #8 of 13
Thread Starter 
also now while i am playing crysis 2 the game starts flickering and lines start flashing across the screen while im playing full screen on 1920x1080 and theirs no fps drop its running smooth, but when i play in window mode on 1770x1000 its fine.

idk i have a 3 year warranty on the cards i might just send them in and use my old rigs ATI x700 (lol)

but if you guys have any more ideas let me know because i would like to avoid sending them in.
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post #9 of 13
Might sound stupid but @ what refresh-rate are you running your monitor?
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post #10 of 13
Thread Starter 
60Hz
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