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Overclocked HD5770 CrossFireX lockups

post #1 of 3
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Sometimes my HD5770s lock up when playing games. So far it's happened in both Crysis 2 and Aliens vs Predator DX11. In Crysis 2 it just locked up completely, in AvP it locked up for about 30 seconds before resuming. I've only been getting these problems since overclocking my HD5770s.

Both cards are at 950mhz/1300mhz (stock is 850mhz/1200mhz). They both ran through Furmark for nearly 45 minutes at these settings without any problems at all. I have turned ULPS off.

Any ideas what could be causing these lockups? They're doing fine in Furmark.
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War Machine
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post #2 of 3
I only had the issue when my OC was not stable.

I had to play around with things for a while to get them right. The needed a little extra voltage to get to 1000/1400.

I had no problems at your speed, other than one of mine needed RMA'd. I couldn't even bumped it 5MHz without it causing lockups.

So pretty much, things would seem stable when using a synthetic benchmark. But were obviously unstable when playing a game. You can try to bump the voltage a tiny bit and see it if helps.

My sig may not show it, but I was using 5770 crossfire. They are sitting on my desk right now.
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post #3 of 3
Quote:
Originally Posted by Lifeshield View Post

Sometimes my HD5770s lock up when playing games. So far it's happened in both Crysis 2 and Aliens vs Predator DX11. In Crysis 2 it just locked up completely, in AvP it locked up for about 30 seconds before resuming. I've only been getting these problems since overclocking my HD5770s.

Both cards are at 950mhz/1300mhz (stock is 850mhz/1200mhz). They both ran through Furmark for nearly 45 minutes at these settings without any problems at all. I have turned ULPS off.

Any ideas what could be causing these lockups? They're doing fine in Furmark.

You need to increase the stock voltage and also check the temperatures of both cards. If you are still getting lock ups either increase voltage, lower the core/memory clocks or the comination of all. Also, increase the fan speed level to keep the max full load temps below 75°C. Furmak will stress the cards more so 75-85°C is expected.

Test the OC stability with the games you play.
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