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Date: Wed, 4 Apr 2012 02:01:27 +0400
From: Solar Designer <>
Cc: Per Thorsheim <>,
Subject: Re: MD5-crypt on Nvidia GPUs tips

On Sun, Apr 01, 2012 at 03:03:03PM +0400, Solar Designer wrote:
> We also have GPU code for John the Ripper here:
> It is slower than hashcat's, though.  (IIRC, I get around 630k c/s
> without tuning on my GTX 570 1600 MHz.  To do: need to try tuning it for
> the card.)

I've just tried tuning the settings for Lukas' code.  With arch sm_20,
blocks 30, threads 768, I get:

Benchmarking: cryptmd5-cuda [MD5-based CRYPT]... DONE
Raw:    714240 c/s real, 707168 c/s virtual

There's still lots of room for improvement, which I hope Lukas or others
will take care of.


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