my 7800gt stoped overclocking.....

Sojuuk

Sojuuk

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Jan 18, 2003
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I had been running my eVGA 7800gt OC at 499/1.15 for ever. And suddenly it wont overclock at all now. My case is very well ventilated and everything so i don't understand why the sudden choke. I checked to see if the HS/fan was clogged but they were(my case has filters on it). The temp monitor says it NEVER goes above 57C. which is well in the green zone atleast for the monitor thingie......

any ideas?

edit: i think something is wrong cause it says it fails even if it downclock it. but it runs fine at normal speeds. Ideas?
 
Also, how is it not overclocking? Are you getting artifacts in games? What are the symptoms?
 
skadebo said:
Also, how is it not overclocking? Are you getting artifacts in games? What are the symptoms?
Click to expand...

the syptoms are it simply WONT do it. it fails under every test even when i severly downclock it.

but im getting no artifacts in games and there are no signs of any problems at all.
 
Sojuuk said:
the syptoms are it simply WONT do it. it fails under every test even when i severly downclock it.

but im getting no artifacts in games and there are no signs of any problems at all.
Click to expand...

sounds like a driver issue. driver clean it and install the most current.
 
Sojuuk said:
just standard coolbits



i reinstalled windows last night trying to fix it.
Click to expand...

ugh... when you've done a clean format and installed a new copy of windows... then it would have to isolate the issue to the hardware.
 
Tzzird said:
ugh... when you've done a clean format and installed a new copy of windows... then it would have to isolate the issue to the hardware.
Click to expand...

but the hardware is showing ZERO symptoms of being broken or even breaking.

im thuroughly convinced that it's not hardware problem.
 
I'd look REALLY hard at your PSU. Could be a sign that its about to fail...I should know, mine just did. :(
 
i shoulda said this a while ago. before i reinstalled my computer would occasionally crash at startup with an blue screen of death with error message pointing to n4_mini.sys

slipped my mind. im sure that is important in some way.

also if it's the PSU that's good. it's got a 3 year warranty.
 
My 7900gt exhibited this failure to overclock about 5 months before it started going belly up. My card had bad ram, so run a video ram test like burn in test's 2d video test etc. My 7800gt also would stop oc'ing exactly as you describe but I stepped up so fast that I never really tinkered with my 7800 near as much as my 7900.

I never found a fix for the problem, but eventually after driver cleaning and driver upgrades over time the problem on my 7900 gt went away and never came back.

I understand that you just reinstalled windows so its probably not a left behind object, but try using the 93.71 drivers if your on xp, those work very well for 7 series and there is no real benefit to running newer drivers as they don't really benefit us single card 7 series owners.

Also the failure even when you downclock is exactly what I had happen. My cards would run stock, but any attempt at using the driver to oc the card would fail the test. Others use rivatuner or ntune to accomplish the same thing, besides under vista coolbits no longer works, at least under x64 it doesn't, don't know about x86.
 
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