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Gtx 460 overclocking issue, assistance needed.

post #1 of 9
Thread Starter 
Ok so from the beginning. This gtx 460 is set at 850/1700/1950 on the bios. It has 4 power phases.

default 50/101/135
2D 405/810/324
3D 405/810/1950
3D 850/1700/1950

The problem:
First off, I have tried MSI afterburner, and also EVGA precision. When i try to overclock say "900" for example on the core. I run Kombustor or Furmark and even at 99% gpu load it is running at 405/810/1950. So i look in cpuz and then it says.

default 50/101/135
3D 405/810/1950
unknown
unknown

Not sure why the gpu is not kicking up under max load. Any help is appreciated because i've never had this issue before and i'm just stumped.
post #2 of 9
The problem you are seeing is common when your OC is not stable. The card automatically down-clocks to prevent itself from imploding.

Also, are you saying that the BIOS has been modded? If it has and the stock clock are 850//1700/1950, have you tried to increase you core voltage? If not, use MSI AB and slide the core voltage a couple of notches to the right to increase it.

To be safe though I would do a clean install of one and only one OC software.

First uninstall MSI afterburner and EVGA precision then do a clean install of whichever one you prefer. Make sure you only use 1 OCing tool to eliminate any compatibility issues. Re-boot PC.

Second, when overclocking try and do it in small increments of 25~50Mhz at a time to be safe and then run Kombustor after each incremental jump to test for stability.

Third, make sure that you are also increasing voltage to the core 1 to 2 steps at a time.

Of course this is the safe and slow way of doing things but if you don't have the patience to do this you can max out your voltage first (1.087v - stock max) in MSI AB. The slide your core clock to 900 Mhz. Also slide your fan speed to 100% as well. Then run Kombustor or Furmark to test for stability. If it passes congratulations, if it doesn't then you need to lower your core clock (and leaving core voltage at max) to 875Mhz or 850Mhz and then run the tests again to check.

EDIT: Have you also set a fan profile in MSI AB? Maybe a simple fan profile will help your card stay cool and pass Kombustor or Furmark when you run them.
Edited by mark_thaddeus - 11/1/11 at 8:31pm
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post #3 of 9
What drivers are you using? Some drivers (namely 275.xx to 280.xx) can cause this issue when running things like Folding@Home.

I'm not ruling out the possiblity of it being an OC issue though. (Nice OC tips btw, mark_thaddeus, though I'm more of a 5-10MHz increment person myself )
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post #4 of 9
Quote:
Originally Posted by mark_thaddeus View Post
The problem you are seeing is common when your OC is not stable. The card automatically down-clocks to prevent itself from imploding.

Also, are you saying that the BIOS has been modded? If it has and the stock clock are 850//1700/1950, have you tried to increase you core voltage? If not, use MSI AB and slide the core voltage a couple of notches to the right to increase it.

To be safe though I would do a clean install of one and only one OC software.

First uninstall MSI afterburner and EVGA precision then do a clean install of whichever one you prefer. Make sure you only use 1 OCing tool to eliminate any compatibility issues. Re-boot PC.

Second, when overclocking try and do it in small increments of 25~50Mhz at a time to be safe and then run Kombustor after each incremental jump to test for stability.

Third, make sure that you are also increasing voltage to the core 1 to 2 steps at a time.

Of course this is the safe and slow way of doing things but if you don't have the patience to do this you can max out your voltage first (1.087v - stock max) in MSI AB. The slide your core clock to 900 Mhz. Also slide your fan speed to 100% as well. Then run Kombustor or Furmark to test for stability. If it passes congratulations, if it doesn't then you need to lower your core clock (and leaving core voltage at max) to 875Mhz or 850Mhz and then run the tests again to check.

EDIT: Have you also set a fan profile in MSI AB? Maybe a simple fan profile will help your card stay cool and pass Kombustor or Furmark when you run them.
...
the card downclocks itself to save energy. It has no idea whether or not you've applied an unsafe overclock. Also: don't just slide everything to max.. that's a horrible idea.
post #5 of 9
Thread Starter 
The card is stock from evga at 850/1700/1950. Its the ftw edition I believe. I did a clean install between programs. Always used afterburner before with no issue. I tried precision after the fact for comparison. I suppose being factory oc'd that extensively just that initial 25-50 MHz jump might be enough to cause instability on voltage but i don't believe it downclocks itself for instability. Would expect the normal artifacts, lines, freezes, or bsod. As far as temps at 850/1700/1950 its about 62c full load which is pretty chilly still. At 900 was 67 max but hovered about 65. The first run at 900 was about 30 minutes. Seemed stable. Set 910 then noticed the downclock. After that it wouldn't clock back up even at 900.

Quote:
Originally Posted by skinnysumo View Post
What drivers are you using? Some drivers (namely 275.xx to 280.xx) can cause this issue when running things like Folding@Home.

I'm not ruling out the possiblity of it being an OC issue though. (Nice OC tips btw, mark_thaddeus, though I'm more of a 5-10MHz increment person myself )
Currently using 285.58

Quote:
Originally Posted by Broseidon View Post
...
the card downclocks itself to save energy. It has no idea whether or not you've applied an unsafe overclock. Also: don't just slide everything to max.. that's a horrible idea.
I would have to agree with that. Basically as i stated above.
Edited by Silentsoul_600 - 11/1/11 at 9:22pm
post #6 of 9
Quote:
Originally Posted by Broseidon View Post
...
the card downclocks itself to save energy. It has no idea whether or not you've applied an unsafe overclock. Also: don't just slide everything to max.. that's a horrible idea.
Quote:
Originally Posted by Silentsoul_600 View Post
The card is stock from evga at 850/1700/1950. Its the ftw edition I believe. I did a clean install between programs. Always used afterburner before with no issue. I tried precision after the fact for comparison. I suppose being factory oc'd that extensively just that initial 25-50 MHz jump might be enough to cause instability on voltage but i don't believe it downclocks itself for instability. Would expect the normal artifacts, lines, freezes, or bsod. As far as temps at 850/1700/1950 its about 62c full load which is pretty chilly still. At 900 was 67 max but hovered about 65. The first run at 900 was about 30 minutes. Seemed stable. Set 910 then noticed the downclock. After that it wouldn't clock back up even at 900..
Actually, guys, Thaddeus is 100% correct.

Fermi's cards absolutely *can* (although they don't always, the system is not perfect) automatically downclock to low power 3d mode (405) due to instability ... as well asto save energy in low gpu-usage scenarios

IOW, they're actually sometimes smarter than you think, Bro

Although I do agree that the 'no-patience' OC'ing methodology he describes ... is not really any sort of 'help' given the present circumstances.

The first and most obvious thing to check here is whether or not the cards exhibit the downclocking when set to 675MHz (reference 460 speed) using Afterburner. If they don't, then you know the OC is involved w/what's going on here. If they continue to run at low-power 3d mode, then I'd prepare to RMA the card, because that shouldn't be happening in Furmark at 99% usage and stock clocks at 62C.

Try that test first, and report back to us
Edited by brettjv - 11/2/11 at 1:28am
    
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post #7 of 9
I don't know if this may help but, I've noticed with my card when overclocking if the drivers crash at unstable clocks the card gets stuck in 2d. You have to restart, rinse and repeat.
post #8 of 9
Thank you @brettjv! This is something that obviously happened to me as well since I'm an owner of a 460 and had some initial trouble OCing and then got the same advice (minus the gung-ho method - that came later) to solve it.

@Broseidon, It does downclock (and goes to 2d mode) to save energy but the scenario given was, he would still see the same clocks even when running Kombustor or Furmark and the load is at 99%. Hence the reason I said it was an OC that was unstable. Normally when this happens, evilDSM is correct in mentioning that all you have to do is basically re-start your system and it should run normally again, until you try to run the test again without fixing your OC.

Yes, I would have to agree that using the gung ho method doesn't really 'help' in this situation. I guess I got used to giving it together with the slow way 'cause people end up saying...too slow... and I jumped the gun.

Like what brettjv said, try and down-clock your card first then run everything in Kombustor or Furmark and see if the same things happens. If it runs fine then you know that the OC was not stable, if not then the RMA will definitely be the logical step thereafter. Report back with the results and hopefully we can help out.
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post #9 of 9
Thread Starter 
Thank you guys for the advice. Runs fine at reference and stock. 900 also sorta. Can run stability tests at 900 multiple times and its fine but check it again and kombustor "starts" at the downclocked speed. Not like it kicks down after stress. I believe the card is fine. About a yr old 0 problems and probably getting a 570-580 when next big purchase so ill leave at the FTW evga o'c if I can't get it to cooperate.
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