[RC5] Cuda client

Joseph Kaye jkaye at isd.net
Thu Jan 31 12:52:38 EST 2013


On 1/30/2013 2:18 PM, bert wrote:
>    The Cuda client is still at 3.1 and the with the latest Nvidia
> driver(310.90) using version 5,could this be the reason my son's GTX 680
> is slower than his old GTX 580(which is in use on my other son's
> computer)?  I was kind of shocked and was expecting a much quicker pace
> in going through 64 stats units(the GTX 580 is averaging about 3 minutes
> or so vs almost 8 minutes with the GTX 680!) Any help or suggestions
> would be appreciated.
>
> Bert
>
>
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It doesn't look like the 6xx series is working so well for dnetc.

http://bugs.distributed.net/show_bug.cgi?id=4507

Apparently they changed the design of the GPU, and while they do have 
more cores now, they removed instructions (or something) that DNETC 
needs for faster computations.  IIRC, it's kinda like when Intel removed 
the ROT function from the P4 CPU's.  They had a higher clock speed, but 
because of the ROTate function was not there, the keyrate was much slower.


--Joseph


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