Posted: Thu Mar 20, 2008 2:21 pm Post subject: four 9800GX2 cards: will it work? I work as a Computer Scientist at an academic image processing department. In my research, I regularly work with Cuda for GPGPU in the context of image reconstruction problems. It seems possible to me to put four o…

DenisR: no offense, but what does your post have to do with the topic of this thread? ;)

Ah, I hadn’t thought about that yet. Have you ever seen a motherboard capable of supporting 8?

Wow, neat! Does it let you offset the motherboard up one slot, then? Definitely post pictures of this monster when you get it working! :)

No offense taken, but as you yourself posted a message about putting 2 ‘GPU-threads’ on 1 CPU-core my post seems quite relevant to me (using streams like this may be a solution for the 1 core per GPU ‘problem’ that I will also encounter if I will swap my 2x 8800GTX for 2x 9800GX2)

I contacted MSI customer support about this: and got their reply today: At least the customer support people are not aware of a fixed limitation (but I won’t count on it) :)

Since you are managing your own busyloop, this should work out without too many problems. 8 kernel calls shouldn’t trigger an implicit sync, but I’ve never tested the queue depth with the streaming API.

I’ve had my eye on this idea too (PhD student in computation biology). There are a few issues, most of which have been covered here with the same theoretical solutions as I found. One extra problem though, on most motherboards the bottom two PCI-E slots are too close to plug directly into (since th…

Good day all If I can add my two cents worth. Apart from the upcoming multi core CPU’s, I was just reading a review of a product in a gaming magazine. There are motherboards now being released that support two physical CPU chips, i.e. 2x 4 cores would give your 8. I belive the board is based on Xe…

There is another issue as well - heat. I’m using two 9800GX2 in a system, and despite of heavily modifications of the chassis (read: lots of big fans), it’s still a problem. With four, I guess you have use a water cooling system. – Kuisma

andrewgerm there have been motherboards that support two cpu’s out for a while, now intel has released skulltrail which uses xeon as you say, but allows for SLi or crossfire. the main issue you guys will face is the fact that on all motherboards the bottom 2 pci-e slots are not spaced to allow a do…

four 9800GX2 cards: will it work?

Accelerated Computing CUDA CUDA Programming and Performance

seibert May 28, 2008, 9:58pm 34

Good to hear. Time to get yourself a sticker for the case that says “3 TFLOPS Inside”.

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four 9800GX2 cards: will it work?

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