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New Sli Setup, Help OC'n

post #1 of 8
Thread Starter 
Currently running 2 EVGA GTX 550 Ti FPB's. Stock Core or 951 and 2178 Memory. Even if I overclock the cards 10mhz. My game will crash after about 40 mins of playing. My temps never go above 55c. I never get artifacts when running kombbuster for an hour or so. So no matter how little I overclock these cards it will still crash a game. I know these arnt very high level cards at all but should still have some OC room. I am currently using MSI Afterburner, but I have tried with precision and still the same. It also did this when I only had 1 card.

My Specs:

My Specs:

Intel i5 2400 @ 3.8
Gigabite Z68A-DH3-B3
2 EVGA GTX 550 Ti FPB
16GB DDR3 Kingston Hyper X Blu 1333
XFX Pro 750w PSU
post #2 of 8
if your game doesn't crash, or no artifacts with stock clocks. then I am afraid you just got bad luck of the draw.
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post #3 of 8
Yeah, probably just some junky cards. Maybe a motherboard or driver issue though? Your PSU seems sufficient.
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post #4 of 8
Thread Starter 
Ya all games run fine on stock clocks.
post #5 of 8
Thread Starter 
Might of been a voltage issue. I have it running at 1.10v now and just played BF3 for about an hour and ran smooth. Running it at 1001mhz from 951 and 2199mhz shader from 2179
post #6 of 8
Wait… You OC'd but didn't think about voltage? No wonder, lol.

If you need a reliable way to test, follow these steps:

1. Find the maximum safe voltage for your GPU online
2. Set your GPU to that voltage in afterburner (or your utility of choice)
3. Download and run ATItool "scan for artifacts"
4. Slowly increase speeds until one of the following happens:
a. Driver crash
b. Artifacts appear
c. Temps get too high

In which case back off the clocks to something more reasonable, continue running atitool and start lowering the voltage down until you get a crash or artifacts, in which case push the voltage back up until stable. Then save that setting and have some fun with 3DMark.
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post #7 of 8
Thread Starter 
No I had adjusted the voltage but not very much. I had run ATI tool before with all my overclocks and never any artifacts or crashing. But when ever I played a game it would crash after a while. It all seems to be running good on this voltage. Found a good number to overclock on and its been stable so far.
post #8 of 8
Quote:
Originally Posted by ckWL View Post

No I had adjusted the voltage but not very much. I had run ATI tool before with all my overclocks and never any artifacts or crashing. But when ever I played a game it would crash after a while. It all seems to be running good on this voltage. Found a good number to overclock on and its been stable so far.

Great! thumb.gif
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Da Derp
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