hashcat Forum

Hi,

When I run oclHashcat (plus or lite), the two AMD hc7900 GPUs run about at the same speed:

Ater 6s:

Code:
Session.Name...: oclHashcat-lite

Status.........: Running

Hash.Target....: ee98e55f3f62a11697889e502d237d3d

Hash.Type......: NTLM

Time.Started...: Thu Jul 11 12:47:39 2013 (6 secs)

Time.Estimated.: Thu Jul 11 12:50:21 2013 (2 mins, 30 secs)

Plain.Mask.....: ?1?2?2?2?2?2?2?3

Plain.Text.....: **lrz4m$

Plain.Length...: 8

Progress.......: 219414528000/5533380698112 (3.97%)

Speed.GPU.#1...: 17673.5M/s

Speed.GPU.#2...: 17671.4M/s

Speed.GPU.#*...: 35344.9M/s

But after some time, the speed of GPU #1 drops down by a half:

Ater 42s:

Code:
Session.Name...: oclHashcat-lite

Status.........: Aborted

Hash.Target....: ee98e55f3f62a11697889e502d237d3d

Hash.Type......: NTLM

Time.Started...: Thu Jul 11 12:47:39 2013 (42 secs)

Time.Estimated.: Thu Jul 11 12:51:08 2013 (2 mins, 40 secs)

Plain.Mask.....: ?1?2?2?2?2?2?2?3

Plain.Text.....: **585ih7

Plain.Length...: 8

Progress.......: 1415894794240/5533380698112 (25.59%)

Speed.GPU.#1...:  8239.9M/s

Speed.GPU.#2...: 17464.4M/s

Speed.GPU.#*...: 25704.3M/s

I tried playing with the --gpu-temp-retain, --gpu-accel, --gpu-loops switches, but no changes.

I am on 2008 R2 with 2x hd7900.

Any ideas?

Cheers

Looks like your card hit 90c temperature. In this case GPU bios will clock down your card to 300 Mhz or less.

qweasd

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