Re: Fwd: workstation for CUDA
On Mon, May 16, 2011 at 07:17:46AM +0200, Francesco Pietra wrote:
> I also forgot a most important aspect of CUDA in the choice of the
> mainboard. Currently, the GPUs carry out only a part - albeit major -
> of the task (non bonded forces), while bonded forces and PME
> long-range forces are left to the CPUs. In practice, a CPU to GPU 2:1
> ratio is still needed. The situation is not likely to change rapidly
> due to enormous task of parallelizing with the myriad of loci on GPUs.
> Perhaps, developers are waiting until GPU-CPU integrated boards are
> available.
GTX 570 cards can be found in single slot versions, which helps a lot
for what you want. A number of motherboards with 4 PCIe x16 slots can
be found as well. If ou want a 2:1 ratio of cpu to gpu, then probably
a dual 6 core xeon or even dual 4 core would be good. A single 8 or 12
core opteron might also be possible to get if anyone makes a board with
four slots for video cards.
EVGA has a board called the SR-2 which takes dual xeon (up to 6 core
each), and has 7 PCIe x16 slots for video cards and such. Putting four
single slot GTX 570s in that should not be a problem. It can take at
least 24GB of ram. There are a few others like it around.
You would need a serious power supply for 4 video cards of course,
but that isn't a big deal.
--
Len Sorensen
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