Really weird downclocking issues...

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skept1k

skept1k

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May 11, 2013
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As of today, my EVGA 460 GTX has started downclocking itself to 405mhz, I am unsure as to why it does it and I cannot find an answer anywhere else. I have the card overclocked to 850/1700/1900 versus stock of 720/1440/1800. The overclock is not the issue, I have ran this clock perfectly stable for almost 2 weeks now with zero problems. When I go into a game it clocks itself down to 405mhz every time. the card doesn't overheat or get hot at all, it stays at 54c under full DX11 gaming. I cannot restore the default clock values unless I restart my computer. Can anyone clear this up? I've switched drivers 3 times to try and fix this problem.
 
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skept1k

skept1k

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May 11, 2013
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Well, it appears I've found a fix. I'm not sure why, but it doesn't like dual monitors for whatever reason. I disabled my second LCD and I haven't downclocked since, and I'm now running at 850mhz core again. Very weird. Any ideas as to why this is an issue?
 
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ingtar33

ingtar33

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Dec 17, 2012
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nope. i've heard of issues with SLi and multiple monitors... but not with a single gpu.
 
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skept1k

skept1k

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May 11, 2013
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Interesting... I'll do some more research on it. I'm only running my single 460 until I get my other back from RMA tomorrow, then I'm switching to SLI and using all 3 of my LCD's. We'll see if that becomes a problem too. Although, I think using one monitor on the desktop and one to game might be confusing the GPU in some strange way *shrugs* who knows. Tech is a finicky thing sometimes.
 
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skept1k

skept1k

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May 11, 2013
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Alright, it appears it wasn't my 2nd monitor being active being the problem. I had the issue again today and I think I've finally figured out what is causing the card to do this. I'm running GPU-Z on my second monitor and it appears my fan will not crank up past 1200rpm even on 900mhz core. All I did was manually set the fan to spin at 90% which is about 4000rpm for me, working flawless on 900mhz core without a crash since. It appears it was indeed a fail safe for heat detection, I'm glad it nabbed that otherwise I'd be out of a card!
 
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K

k33g0rz

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Feb 26, 2013
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I was having this problem too starting when i updated to .49 drivers with sli 670s. Restarting didn't help, 700 mhz on cs go terrible performance. switched drivers back to .20 no change. reinstalled .49 and geforce experence and ran 3dmark and it was fine. Overclocked and it ran fine. Removed overclock and it was fine. Don't know if it'll come back but try some of those things I did.
 
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skept1k

skept1k

Honorable
May 11, 2013
193
0
10,690


I'm on the .49 drivers right now, so far they're working fine after I ran driver sweeper yesterday. Card has yet to underclock itself since I set the fan to 90%. If it continues to work then I'm 99% sure it was the fan not kicking in causing the card to activate fail-safes on overheating.
 
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