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Palit GTX 560 won't pass 1ghz core clock!

BSODMASTER

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So I recently changed my thermal grease on my Palit GTX 560 OC GPU and decided to overclock it to reach it limits. I used AfterBurner and at first the Core clock wasn't going upper than 999Mhz. I read some forums and it seemed that is a driver problem that on v300 of it and upper the limit appears. So I downgrade my NVIDIA driver to v295.73 and I was able to pass the limit but now there is another problem - every time I launch an 3d app (Far Cry 3, Tomb Raider : 2013) it crashes after some time (at 1004Mhz clock) or even won't launch. The temperature was around 70~79 C which I think is normally and the fan was on 100% power. Then I thought the problem was in the core voltage but I set it at 1200 mV and nothing changes but some games crash after more time. I modified the VGA Bios to pass the 1087 mV core voltage limit on it and I don't think going any futher than 1200 mV will solve my problem. Any ideas why this happens?

EDIT: But I want to add that at 1200 mV my GPU temperature is rising very quick and nearly hit the 100 C.
 
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Change the stock cooler. You'll be cooler hence the card will able to oc much much better, I'm betting you are temp limited!
 

BSODMASTER

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Possibly but the 3d app (Far Cry 3) crashes at 73 C Max temperature with (1004Mhz clock and 1150 mV). I mean that the crash couldn't be because of overheating right?
 
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I agree with Bo$$, the more your chip gets hot the more it becomes unstable.

For example your graphics card could be rock stable at 800 Mhz @ 60c but become unstable @ 90c on the same frequency.

Heat is a sworn enemy!! ;)
 

BSODMASTER

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It seems you're right but it's strange that these high temperatures are 79 C. Like always the software shows one and the hardware does other :p.
 
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I don't think these cards support going over 999MHz. Someone had that problem last year with another 560 Ti even though it reached 999MHz with zero problems. I would just find the best voltage for 999MHz and call it a day, as I couldn't imagine using 1.2v on a GF104/114 without causing some sort of damage to the voltage regulation circuit.
 

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Possibly but the 3d app (Far Cry 3) crashes at 73 C Max temperature with (1004Mhz clock and 1150 mV). I mean that the crash couldn't be because of overheating right?

no not specificially overheating.. it is just unstable as Radrok has elaborated on. Past 999 i don't think the perfomance benefits will be visible I'd swap coolers if you can then you can acheive max, otherwise I'd not bother, My GTX570 OC is sitting unvolted from 1.025 to 0.963. I think too much extra voltage wont really help ;)

Also can you describe the crash?

Are you pushing the video ram too?

What application are you using to overclock??

I agree with Bo$$, the more your chip gets hot the more it becomes unstable.

For example your graphics card could be rock stable at 800 Mhz @ 60c but become unstable @ 90c on the same frequency.

Heat is a sworn enemy!! ;)

Yep! I've found this is true in a moderate number of cases if you are really pushing the clocks otherwise it's not really an issue. What cards have you seen this on just out of interest?
 

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dont think palit 560 will do 1GHz. they go cookoo
 
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Yep! I've found this is true in a moderate number of cases if you are really pushing the clocks otherwise it's not really an issue. What cards have you seen this on just out of interest?


I had one 6990 that could hit 1000 on both cores provided the temperature was kept under 70c, I remember it well cause when I tried I had to spin its fan at 100% and well you all know how well the 6990 blower fan is known :laugh:

Any C more over 70c would cause an instant crash.
 
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dont think palit 560 will do 1GHz. they go cookoo

Correct, JrRacinFan had the exact same problem with a Palit 560Ti 2GB. Just stick with 999MHz and lower the voltage. A cooler isn't going to correct a BIOS or hardware limitation.
 
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Well youre using old graphics card drivers so theres your first clue why newer games wont boot and keep crashing. And then theres the overclock thats way too near the limit so lower it about 10-20mhz. Btw why are you obsessing over this 1GHz overclock anyway? To be fair these Palit 560 cards start at ~800mhz stock so its already a wonder youre getting near the 1GHz mark because Palit isn't known for their quality in binning.
 
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Well youre using old graphics card drivers so theres your first clue why newer games wont boot and keep crashing. And then theres the overclock thats way too near the limit so lower it about 10-20mhz. Btw why are you obsessing over this 1GHz overclock anyway? To be fair these Palit 560 cards start at ~800mhz stock so its already a wonder youre getting near the 1GHz mark because Palit isn't known for their quality in binning.

:toast::toast::toast::toast::toast::toast:

I couldn't agree more.
 
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Well I have a msi gtx 560 OC edition... I havent gone above 950 Mhz, the stable for me is 933 Mhz. After that its not worth to stress it more since there is like 1 FPS gain... and I want the card to last a bit longer :)
 

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Correct, JrRacinFan had the exact same problem with a Palit 560Ti 2GB. Just stick with 999MHz and lower the voltage. A cooler isn't going to correct a BIOS or hardware limitation.

i think the limitation on nvidia comes from the shader cores. shader clock = 2x core. so unless the shaders are just as much overclockable, you wont get it.

and i think there is some limit to shader clock. even i cant get a boot past 999Mhz on my GTS450 OC. my stock is 950MHz!
 

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nvidia comes from the shader cores

No i've hit 925 on my GTX570 it's to do with mainly heat and voltage stability, the VRMS aren't good enough on cheaper cards to push them very far... If you get a proper brand to start you'll be fine, 999 is decent for a GTs450 regular stock is like 700 normally.

Defects in the shaders are usually much harder to find at those clocks its voltage stability that is the issue ;)
 

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Thank you for the plenty of information you shared! :)

I had one 6990 that could hit 1000 on both cores provided the temperature was kept under 70c, I remember it well cause when I tried I had to spin its fan at 100% and well you all know how well the 6990 blower fan is known :laugh:

Any C more over 70c would cause an instant crash.

This fits exactly as the probably issue for my problem. So that's way I wouldn't bother overclocking anymore until I bought a better cooler for my GPU.

Correct, JrRacinFan had the exact same problem with a Palit 560Ti 2GB. Just stick with 999MHz and lower the voltage. A cooler isn't going to correct a BIOS or hardware limitation.

Actually the limitation appear in the newer NVIDIA Drivers as I said above. I've read this in some forum but I can't find the link now.

Well youre using old graphics card drivers so theres your first clue why newer games wont boot and keep crashing. And then theres the overclock thats way too near the limit so lower it about 10-20mhz. Btw why are you obsessing over this 1GHz overclock anyway? To be fair these Palit 560 cards start at ~800mhz stock so its already a wonder youre getting near the 1GHz mark because Palit isn't known for their quality in binning.

It's just an experiment with educational purpose. I really wanted to see my GPU (with new thermal grease) limits as I said before.
 
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