[Help] Strange noise only when mining with SGMiner / x11

[deephouse]

Hey guys,

This one beats me and I have no idea what can be the problem.


I am running on Giga 7950 GPU and it works and runs smoothly. I have tried mining different types of Algo on this and everything runs smoothly.

When I run Scrypt, N-Scrypt, Keccak etc on my miner, I get a normal sound from the rig. Please see audio file below while on Scrypt, N-Scrypt, Keccak etc:

http://vocaroo.com/i/s1JtVurpH3Da

Now when I switch on SGMiner and mine x11, I get a weird buzzing noise that is louder than the actual fan noise. See audio file below. If I close the SGMiner / x11 miner, the noise goes off right away. The temp and fan speed are perfect in SGMiner and its runs and hashes just fine, without any HW errors, but the buzz is annoying and difficult to sleep in the night cause of this.

http://vocaroo.com/i/s1IpBeraD64m

I tried playing with the config settings and tried changing almost everything I could (temp, intensity, auto & gnu fan, etc.) to see if I can eliminate the buzz noise. No luck so far.

This is my current setting:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
color 0a
sgminer -k darkcoin -o URL:PORT -u USER -p x -I 20 -g 1 -w 256 --lookup-gap 2 --gpu-engine 1100 --gpu-memclock 1500 --gpu-powertune 20 --thread-concurrency 24000 --temp-cutoff 95 --temp-overheat 85 --temp-target 75 --api-listen --api-allow W:127.0.0.1

Note: The noise does reduce a bit when I lower the Intensity to 13, but I don't see why the buzz should be present in the first place and something that does not happen with other Algo.
Note: the audio is recorded from the same place on the rig.

Thanks in advance.

[AltCoin2Cash]

Fan rpm try to manual rise rpm or noisy coils ( psu or gpu ) no panic its normal.

[Amph]

i had the exact same shit, with my old toxic, i was not able to find a solution, i sold them for vapor-x-tri-x

i think that problem occur because i OCed the vram too much, 1800+

it's a coil whine, there are little coils near the vram, normally those coil are sorrounded with something that prevent the buzz sound to escape from them, but perhaps the temp too high of the vram , have damaged them or something

[deephouse]

i had the exact same shit, with my old toxic, i was not able to find a solution, i sold them for vapor-x-tri-x

i think that problem occur because i OCed the vram too much, 1800+

it's a coil whine, there are little coils near the vram, normally those coil are sorrounded with something that prevent the buzz sound to escape from them, but perhaps the temp too high of the vram , have damaged them or something

Thanks for the reply. I have a Asrock H81 Pro BTC ATX Motherboard. Do you think that makes any difference?