Please keep all Gromacs-related questions on the gmx-users mailing list. I am
not a private help service.
On 6/26/13 12:05 AM, Dwey wrote:
HI Justin,
Thanks for your suggestions about GPU/CPU load imbalance.
I actually dug into Archive. It concludes that a single and faster GPU is better
than dual GPUs on the same card, in general. However, I am looking for
answers to resolve the issue of load imbalance with respect to the number of GPU
cards or improvement of mdp settings.
To answer this, I guess someone must have experience of playing multiple
configures of GPU/CPU although I expect someone like you have experience of
modifying mdp files.
If it works by changing mdp files, I am happy with this way as well.
I don't modify .mdp files to try for better performance. I prefer accurate
results, even if it costs me a bit in terms of performance.
So I plan to buy another GTX 680 or two new high-end GTX 780s to figure it out.
In this way, I will have multiple settings of GPU/CPU. I will keep you updated.
By the way, do you know about a SLI bridge that is used to connect two GPU
cards ? I wonder if you have knowledge about this because I do not want to
accidentally burn GPU cards.
I guess I try to ask if I have to use a SLI bridge or just plug separately into
two cards into two different PCIe without a SLI bridge.
I have no expertise in tweaking hardware. I have some experience with GPU's,
but it is limited to configurations that were made available to me and I did not
performance testing. This is why discussions need to stay on the list; you
stand a better chance of someone knowing how to help you.
-Justin
--
========================================
Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
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