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Overclocking issue with 7800gt

post #1 of 23
Thread Starter 
Whenever I overclock my MSI 7800gt I get these quick screen flashes intermitently. Happens when playing games or 3D Studio Max. I'm using MSI's DOT utility that came with my card. I tried all the 6 preset overclocking options and it happens with all of them. I monitored the GPU temp and it's around 42-46. Anyone got a clue what causes these flashes?

Someone suggested increasing the PCIe voltage but my Bios doesn't have that option.

Something tells me I should have gone with BFG or eVGA
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post #2 of 23
Same thing with ALOT of 7800gts. You need to check your bios for what the geometric delta is set at.
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post #3 of 23
Thread Starter 
What should it be at?

I don't remember seeing geometric delta in the bios though.
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post #4 of 23
it might be at 40 it should be at 0 right next to your clock settings you should see it
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post #5 of 23
Thread Starter 
I change that through Rivatuner right?
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post #6 of 23
I get the same thing, games only really work correctly on stock setting which is stupid, BF2 works really good stock but sucks when oc'd to even 410/1000,
i used coolbits to "unlock" the oc feature but hasnt really helped much, so you mentioned geometric delta, um where is that at, and will that help and have you done it and what are your oc settings and how well does yours run on those settings.

Thanks
     
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post #7 of 23
use nibitor 2.6 to read your bios
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post #8 of 23
Thread Starter 
Well I figured out what those flashes were. Using RivaTuner's monitoring I noticed the flashes occured as soon as the 3D clock and mem clock jumped.
Right now the card is set at 400/1000 (stock)
when I run a game it jumps the 3D clock to 430 (that's when one flash occurs)
then MSI's DOT jumps it once more to 489/1096 (another flash occurs)
when I quit the game 2 flashes occur as it drops down to stock clock.
Weird...
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post #9 of 23
sounds like the delta
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post #10 of 23
Thread Starter 
Quote:
Originally Posted by ThaWaxShop
sounds like the delta
Yup, after reading about it I say you're right.

So it's not really a bad thing since it boosts performance right?
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