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7600GT problem

post #1 of 9
Thread Starter 
Im currently have evga 7600gt co
which is overclocked to 520/840.
from yesterday I got crash on my screen and I assumed it's windows problem, cuz I modified some os files.
I reinstalled windows and installed latest forceware and coolbits.
When I tried to up speed where it was, I got crash on screen.
I had to reset my computer.
and after rebooting, I tried increase core speed just by 5 from stock speed.
I got crash on my screen again. (random blinking & some color stripes on screen)
SO now I'm at stock speed, and having no problem
but it's so weird.
this is a replacement card from where I bought (not egg)
I took out heatsink to see what's going on under it.
and I found some scratch on the back part of heatsink.
but this card is from new sealed box... strange

I just sent email asking the shop to replace or refund since this is second time I had to return it.
well, didn't get answer yet.
while waiting, can someone tell what the problem look like? or like guess what's going on?
thanks
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post #2 of 9
Can you take a picture of the heatsink? Usually a scratch won't cause a major problem like that, just a few C higher. Does the card have a temperature sensor?
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post #3 of 9
Actually with these cards are power starved...There is a voltage mod (I haven't tried it yet) which gives these the monster overclocking ability...Mine does the same thing when i try an overclock them....try lookin aroud maybe this will solve your overclocking problem
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post #4 of 9
Thread Starter 
i guess that scratch is not going to affect the temp.
but it suppose to clean since it's new.
and i saw some stains on back part of card.

and it does have temp sensor now the reading is 50C
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post #5 of 9
50 is about right....mine stay at about 40ish with the cooling fans they came with and a 120mm blowing on them

here's the link to that volt mod if you want it

http://sg.vr-zone.com/?i=3330
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post #6 of 9
Thread Starter 
but the thing is mine was working perfectly during week
with 620/840

then suddenly the problem arised
and Im not able to up even 1Mhz
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post #7 of 9
If your's has the passive heat sink then i'd say it's been damaged.. does it still play games, and is the color and everything still clear?
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post #8 of 9
Thread Starter 
mine is GT which is equipped with heatsink + fan (standard)
so it's not passive cooling.
Im sure nothing is overheating
and recently I changed power to provide better power to card

I got replacement card almost same time I got new psu
and then I oc'd card wasnt have any problem

but then the problem occured now im stuck at stock speed.

so im thinking get exchange, refund, or use step-up to get 7900gt
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post #9 of 9
Ya step up is probably the best choice...They're just not the card for you I hear good things about the 7900's. That sucks you've gotten some crappy cards man...I've had mine in for about a month and i'm just loving it....
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