Re Optimus: Basically Linus Torvalds attempted to force NVIDIA to make
their drivers open source and NVIDIA balked. Then Linus Torvalds gave them
the finger on video and it all went downhill from there.
There's an easy fix to this if the Linux team really wants Optimus support
but they have to back down from their Stallman-like stance on this matter.
GPL-3 is the kiss of death for support from most commercial software
companies.
On Wed, Aug 1, 2012 at 11:14 AM, Benjamin D Madej <bmadej.ucsd.edu> wrote:
> I think some other people on this mailing list can comment about Amber's
> support of certain NVIDIA GPUs. However, I wanted to add a note about
> NVIDIA laptop GPUs and linux.
>
> One caveat on using NVIDIA GPUs with laptops: NVIDIA does not support
> NVIDIA Optimus in its linux driver currently. I think that NVIDIA would
> like to get it working, but there's been ongoing "issues" between NVIDIA
> and linux developers... Take a look at the news.
>
> I've personally played around with some of the open source community
> developed fixes like bumblebee. As of six months ago, I couldn't get it
> working for my laptop. After wasting a lot of time, I eventually gave up
> and just bought a desktop NVIDIA GPU.
>
> Also, you might want to get a lot of ice packs for when your laptop heats
> up running pmemd.CUDA.
>
> Ben Madej
> Walker Molecular Dynamics Lab
>
> ________________________________________
> From: Jason Swails [jason.swails.gmail.com]
> Sent: Wednesday, August 01, 2012 5:29 AM
> To: AMBER Mailing List
> Subject: Re: [AMBER] laptop GPU support
>
> Amber supports all GPUs with CUDA 'compute' capability higher than 1.3
> (which is the first revision with double precision support in hardware).
>
> A (wikipedia) reference that has a good list of GPUs and their compute
> capabilities is here: http://en.wikipedia.org/wiki/CUDA#Supported_GPUs --
> and the 640M and 650M have compute capability 3.0. They are not yet
> supported, I don't think, but they will be not too long in the future. The
> 630M is not on the list, but I think it's in the same family as the other
> two.
>
> I'm not sure what performance you should expect, as the number of compute
> cores in mobile cards is typically lower than the corresponding desktop
> graphics card. I've also not seen any reports about GPU performance in
> laptops... (and don't forget that the GPU will also be rendering the
> screen, so it won't be fully dedicated to Amber calculations, which may or
> may not work in the first place).
>
> HTH,
> Jason
>
> On Wed, Aug 1, 2012 at 6:08 AM, Thomas Evangelidis <tevang3.gmail.com
> >wrote:
>
> > Dear AMBER developers,
> >
> > I am about to buy a new laptop so I would like to know if AMBER supports,
> > or will support in the future, any of the following GPUs:
> >
> > NVIDIA GeForce GT 630M, 640M or 650M
> >
> >
> > Thank you in advance,
> > Thomas
> > _______________________________________________
> > AMBER mailing list
> > AMBER.ambermd.org
> > http://lists.ambermd.org/mailman/listinfo/amber
> >
>
>
>
> --
> Jason M. Swails
> Quantum Theory Project,
> University of Florida
> Ph.D. Candidate
> 352-392-4032
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>
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Received on Thu Aug 02 2012 - 08:30:05 PDT
