Re: GPU-CPU small-scale machine for NAMD

From: Darko Stefanovski (
Date: Tue May 17 2011 - 12:10:31 CDT

Hi Francesco,

GTX460 has 336 CUDA cores and if you go with three of them you will be
getting 1008 CUDA cores.That is very close to the performance of a
GTX590 which has 1024 CUDAs and approximately the same memory. Now in
regards to working with two computers with CUDAs, We do have a setup
like this here but unfortunately working through Ethernet is extremly
slow. Part of the slow down is associated with the protocol you will be
using. I tried both rsh ans ssh and two machines working on the same
problem as one machine was much much much slower. Perhaps we are doing
something wrong.

Best wishes,

On 5/16/2011 1:45 AM, Francesco Pietra wrote:
> I have followed previous posts on small-scale GPU-CPU, whre Axel
> (Professor Kohlmeyer) gave key indications.
> For a classical-MM-dedicated machine (i.e. single precision
> calculations), i am trying to spare money (and electricity bill) as
> much as possible, considering that as a particularly temporary
> investment (future of integrated GPU-CPU cards?). Thus, I am
> considering a consumer motherboard based on AMD Phenom II X6 1075T CPU
> and 2/3x GTX460s.
> My question is, is there any experience on running NAMD on such
> graphic cards? If yes, is there any experience on a cluster made of
> two such machines? (considering that I have no more an electronic
> engineer helping me).
> Thanks a lot for advice
> francesco pietra

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