I was wondering if anyone has tried builidng a machine for CUDA using four 9800GX2 cards. This should give a total 8 CUDA devices with 128 stream processors in each in one machine. Youd probably need 8 CPU cores, an extream PSU, a special case, plus a PCI-E riser or two.
The hardware I am looking at for this is as follows:
Motherboard: Intel Skulltrail http://www.scan.co.uk/products/productinfo…roductID=764124
This motherboard is one of the few with both dual-socket and four 16x PCI-slots (though really its two 16x, which would be 8x per slot with four cards, or 4x per cuda device).
CPU: two quad-core Xeons http://www.scan.co.uk/Products/ProductInfo…roductID=751151
The Skulltrail is socket 771, so xeons should fit and cut down on excessive cost (compared to the recomened CPUs for a skulltrail board).
PSU: Thermaltake 1500W http://www.overclockers.co.uk/showproduct…tid=123&subcat=
The only PSU I could find with both 4 6-pin and 4 8-pin connectors.
Case: Thermaltake super-tower
One of the few 10-PCI slot cases. There are some others, but this is one of the cheaper ones.
PCI-E riser(s): http://www.ably.com.tw/pdt/viewpdt.asp?abs…&cat=PCIE_RISER
Because the lowest two PCI-e sockets are adjacent, they need to be spread out to fit two double-with 9800 GX2 cards in. Hopefully, this should do the job, but an additional riser for the upper one may be needed to allow this to fit on the lower slot.
Is there anything else I am missing here? Has anyone built a system like this before? It would sound like a small helicopter, but this would be put in a dedicated server room somewhere out of sight.