How to

[rurapenthe]

Are you over-clocking that GPU at all?

Because I ran some tests on my new ATI 6970 card and it was fine. However the moment i tried any sort of overclocking it would freeze as soon as oclhashcat starts to run.

In my case its on Windows. I'm not sure if its too much work on the GPU and its protecting itself, or if its Windows+ATI Drivers that are unhappy. I'm on Catalyst 11.4

My suggestion, make sure you are not overclocking

Also, use your card's software to force your fan speed to around 60% while cracking. I have a feeling the "automatic" fan speed takes too long to realize the GPU is being hammered and by the time it speeds up to cool the GPU the machine has frozen.

Atom, i know everyone wants speed, but what about a switch to get hashcat to increment its GPU usage in steps. Like 0-20% usage for 1min, then 20-50 for 1-min etc. So that the card/drivers have time to increase the fan speed.

Code:

$A$A$A$0
$A$A$A$1
$A$A$A$2

Feel free to send me a pm if you need further assistance.

Thank very much, but now also 4 char mask freeze everything.

you should also try lower workload settings (reduces the speed a bit but keep desktop nearly lag-free):

for -m 500 and AMD gpu use:

--gpu-accel 40 --gpu-loops 128

but the most important thing is to use catalyst 11.4. otherwise you have to deal with 100% cpu load caused by amd driver bugs.

Before i tried your suggested settings and the output was:

Code:

1000 must be divideable by --gpu-loops

So change --gpu-loops 100

ant it frozen againg.

I reinstalled Catalyst 11.4 driver

but still frozen problem.

My Linux version is:

Code:

# uname -a
Linux 2.6.35-30-generic #56-Ubuntu SMP Mon Jul 11 20:01:08 UTC 2011 x86_64 GNU/Linu

Any idea?

ps: that's my