Hardware errors on a GPU

[tom_o]

Basically I realised the thing that was holding back my GPU overclock was actually my CPU overlock. Dialled my i3 back down from 4GHz to a slightly more reasonable 3.66 and now I can run my 5830 GPU at 1000/1310 where the previous max stable OC was 925/1250 (stock is 840/1125).

This has taken my hashrate from 280Mhash with 250WU up to 317Mhash with 290-300WU but I'm now getting 1 HW error every couple of days. Is this anything to particularly worry about? Temps are 75 core, 78 ram and 76 on the VRM with the fanspeed at 2900RPM.

Hope it's not going to burst into flames like my other 5830, although that one never had a single hardware error.

[chondrite]

A GPU miner working on SHA-256?   

[tom_o]

Ahem, if I mention 'the letter after j' hash then this thread will get moved to the Alt subforum and get instantly lost onto the third page like my thread I made 4 hours ago did... It is earning me on average 0.005BTC a day though straight to a paper wallet.

Anyway, an idea what a HW error actually means? Is this somewhat equivalent to getting a graphical artifact every two days in a 3d game?

If so I won't worry about it. If it's something more serious I could probably wind the clocks back a little.

[ineedit]

Ahem, if I mention 'the letter after j' hash then this thread will get moved to the Alt subforum and get instantly lost onto the third page like my thread I made 4 hours ago did... It is earning me on average 0.005BTC a day though straight to a paper wallet.

Anyway, an idea what a HW error actually means? Is this somewhat equivalent to getting a graphical artifact every two days in a 3d game?

If so I won't worry about it. If it's something more serious I could probably wind the clocks back a little.

HW is not just hardware, it can also mean a problem with memory reuse in the software as it shares the main memory among the GPU threads, it is not a problem at 1 every 2 days.

[vm1990]

its fine might want to crack up the fan speed a touch but 75C isnt to bad and hardware errors are to be expected i get 20 or so a day.... just means something went wrong like the gpu didnt send or receive a full hash...

[tom_o]

its fine might want to crack up the fan speed a touch but 75C isnt to bad and hardware errors are to be expected i get 20 or so a day.... just means something went wrong like the gpu didnt send or receive a full hash...

Nice to know, fanspeed over 3000RPM gets really really diminishing returns I think due to the amount of airflow in the case anyway, quite quiet at that speed too. Got it at fixed fanspeed of 60% cause cgminer likes to ramp it up and down all the time which is really annoying when trying to sleep.

The stock AMD fan curve doesn't speed the fan up over 2500RPM until the GPU hits over 85 degrees!