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GTX 460 OC

post #1 of 13
Thread Starter 
I've clocked my 460 up to the following specs:

Core: 850MHZ
Shader: 1700MHz
Memory:2170
V: 1.075

Runs fine on every imaginable task except for Furmark, which causes the GPU to crash the system above 80C, surely this can't be normal?
post #2 of 13
its possible unstable if it craches the comp over 80c. try going max(1.087v) and see if that helps.

I personally flashed my 2 cards to set a higher voltage cap(1.2v) and i can a max clock of:
925mhz core
1850mhz shader
and 2245mhz memory( i turn it down to 2070 cuz its pretty much useless to do more and it just adds heat)

all at 1.150v with a max furmark temp of 74c
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post #3 of 13
Yeah, my cards clocked up to 965mhz @ 1.15v and 900mhz @ 1.087v, but they only did 2100 on the mem. Try lowering your mem and see if that helps.

Also, you might want to map out a somewhat aggressive fan profile to keep that thing under 70C (seems to be the point where I would lose stability).
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post #4 of 13
Thread Starter 
Quote:
Originally Posted by kill View Post

its possible unstable if it craches the comp over 80c. try going max(1.087v) and see if that helps.
I personally flashed my 2 cards to set a higher voltage cap(1.2v) and i can a max clock of:
925mhz core
1850mhz shader
and 2245mhz memory( i turn it down to 2070 cuz its pretty much useless to do more and it just adds heat)
all at 1.150v with a max furmark temp of 74c

925/1850 seems like a very large clock for me as i'm running air cooling.

tried setting fan profiles and kept the temps low, but it still creeps and settles a bit over 80.
do you think the extra temps are due to the memory clock being too high?
post #5 of 13
Thread Starter 
Quote:
Originally Posted by Bo_Punk_2.0 View Post

Yeah, my cards clocked up to 965mhz @ 1.15v and 900mhz @ 1.087v, but they only did 2100 on the mem. Try lowering your mem and see if that helps.
Also, you might want to map out a somewhat aggressive fan profile to keep that thing under 70C (seems to be the point where I would lose stability).

Never mind my previous comment! i'll wind down the memory and up the core and see what i get.

model is the Gigabyte 460 with the 2 80mm fans and it's in an RV-02 case btw.
post #6 of 13
Thread Starter 
Had a good look at the temperature curves and the GPU didn't have much trouble
with the 900/1800 speeds with the memory clock at a conservative 1800, but
temps ramped up much quicker when i upped the mem speed to 2050.

any ideas? i'm almost considering running the memory at stock (1800)
post #7 of 13
Thread Starter 
furmark says the core is now running at 405mhz, that's not quite right...
post #8 of 13
Thread Starter 
Quote:
Originally Posted by BagOfDucks View Post

furmark says the core is now running at 405mhz, that's not quite right...

Very strange, only happened since i installed 280.26 version drivers,
also only seems to happen when both furmark and AB are running;
maybe the 2D core is kicking in due to temps or power, surely not though?

getting some nice temps at 900/1800/1900 with the aggressive fan
profile (thanks bo_punk) and the climb to 80C is much much longer!
Will be worried if the card plays up like that again though!...
post #9 of 13
Quote:
Originally Posted by BagOfDucks View Post

925/1850 seems like a very large clock for me as i'm running air cooling.
tried setting fan profiles and kept the temps low, but it still creeps and settles a bit over 80.
do you think the extra temps are due to the memory clock being too high?
Im also running air >.<<br />
Quote:
Originally Posted by BagOfDucks View Post

Very strange, only happened since i installed 280.26 version drivers,
also only seems to happen when both furmark and AB are running;
maybe the 2D core is kicking in due to temps or power, surely not though?
getting some nice temps at 900/1800/1900 with the aggressive fan
profile (thanks bo_punk) and the climb to 80C is much much longer!
Will be worried if the card plays up like that again though!...

If the core speed drops to 405 then its unstable so it slows it to the 2d speed
If possible you may want to clean out your fan and heatsink and possibly replace your thermal grease
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post #10 of 13
Thread Starter 
yeah, I suspect either the GPU is drawing too much power and the PSU can't supply it (750W) or the card may be faulty.

I hope it's the card, as it's still under warranty!
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