possible dual 7950's?

[odannyboy000]

I was curious to know if it is possible to buy 2 geforce 7950's and configure them into one motherboard that supports sli and PCIe. I do realize that the 7950 is 2 graphics cards stacked onto each other, and I am also aware that one card contains 1GB memory, so 2 would make a computer idealy have 2GB. Will this work or what?

[saphalline]

First of all, only the 7950 GX2 has two SLI vid cards sandwiched together. The 7950 GT does not. Be careful with the naming schemes.

Secondly, yes, it's perfectly viable to put two 7950 GX2's in SLI. It gives you the quick and easy way to get to quad-SLI. As long as the mobo has enough room (most SLI mobo's do) then it works great.

Thirdly, you mistake the RAM usage of SLI. On a 7950 GX2, each GPU has 512MB for itself. The entire card as a whole has 1GB on it, but in SLI, total RAM is limited to a per-GPU basis. A single 7950 GX2 has 512MB of usable graphics RAM. Extending that to two 7950 GX2's, you've got 4 x 512MB cards arranged in pairs of pairs. Each pair feeds off its own RAM, so you effectively have 512MB per GPU, or 1GB per GX2 to work with. There's 2GB total on both combo cards, but the effective use in SLI would still leave you with 512MB in reality, or about 1GB from the mobo's perspective.