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Date: Sat, 31 Mar 2012 16:57:46 +0400
From: Solar Designer <>
Subject: MSCash2 CUDA

Lukas -

With default settings, your MSCash2 CUDA code did only:

Benchmarking: mscash2-cuda [GPU]... DONE
Raw:    7889 c/s real, 7939 c/s virtual

on my GTX-570.  By simply changing THREADS from 128 to 480 and arch
from sm_10 to sm_20, I got it to:

Benchmarking: mscash2-cuda [GPU]... DONE
Raw:    25988 c/s real, 25988 c/s virtual

which is pretty close to hashcat's reported 32.3k c/s.

This highlights the importance of setting these things correctly for a
given card.  At the very least, we need to document it somewhere.

Doubling BLOCKS (14 to 28) gave me:

Benchmarking: mscash2-cuda [GPU]... DONE
Raw:    26012 c/s real, 26012 c/s virtual

although that's almost the same speed.


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