Best solution for this I found was to reduce the High Performance GPU Clock Settings from the default 880Mhz down to the lowest 500Mhz and increase the Fan to 100% and am now getting - Speed.GPU.#*...: 108.6 kH/s
although it can go up to 142.5kH/s , but at least it won't freeze/crash.
Just using the normal command :
oclhashcat-plus64.exe -m 2500 -a 3 pentest.hccap Z?u?u?u?u?u?u?u
Time.Estimated.: Tue Nov 12 14:48:38 2013 (20 hours, 46 mins)
Speed.GPU.#1...: 40903 H/s
Speed.GPU.#2...: 67146 H/s
Speed.GPU.#*...: 108.0 kH/s
Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.......: 26148864/8031810176 (0.33%)
Rejected.......: 0/26148864 (0.00%)
HWMon.GPU.#1...: 87% Util, 51c Temp, 100% Fan
HWMon.GPU.#2...: 87% Util, 50c Temp, 100% Fan
EDIT: Just played a youtube video, then the screen went blank (GPU crashed) again...
although it can go up to 142.5kH/s , but at least it won't freeze/crash.
Just using the normal command :
oclhashcat-plus64.exe -m 2500 -a 3 pentest.hccap Z?u?u?u?u?u?u?u
Time.Estimated.: Tue Nov 12 14:48:38 2013 (20 hours, 46 mins)
Speed.GPU.#1...: 40903 H/s
Speed.GPU.#2...: 67146 H/s
Speed.GPU.#*...: 108.0 kH/s
Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.......: 26148864/8031810176 (0.33%)
Rejected.......: 0/26148864 (0.00%)
HWMon.GPU.#1...: 87% Util, 51c Temp, 100% Fan
HWMon.GPU.#2...: 87% Util, 50c Temp, 100% Fan
EDIT: Just played a youtube video, then the screen went blank (GPU crashed) again...