Anyone try 8800GTS 320mb and 8800GTS 640mb in SLI???

I was just wondering if its possible. I was looking at their site and it says that the cards must be matched but the list does not distinguish between the different GTS's. Just curious...

man , 2 8800 gts in sli are worse than an 8800 gtx , if you have the money take the gtx, if not 1 gts , if they are 320 mb , 2 cards wont be 640 , the total amount will be only 320 mb ... you got it
and i dont think that they will work because the diffrent amount of ram...

Don't waste your money. Just get the GTX. It also depends on your motherboard and whether or not it supports x16 x16 in SLI. If it's only x8 x8 then it's not worth it. You'll be better off just using one card.

Steve, here is how it works. Both cards have the EXACT same memory states when SLI is working. This means either you'll have 320 megabytes of video memory available, from the point of view of directX, or it won't work at all.

Anyhow, both cards have the same data in memory, and each card is instructed to spend it's time drawing some of the frames. Therefore, while SLI can be much faster, you'll never have more available video memory for games than the memory of one card. It IS using the ram on both cards, but games can effectively access only one.

2 x 8800gts 640mb in sli > 1 x 8800gtx, u should of went with the 640mb gts which is greater and will be gaurenteed to shine more then the 320gts in directx 10, since the 640 obvioulsy has more ram, it will obvioulsy produce better fps in directx10 gaems which have more detail and would have more ram to store info in..

Or, you could wait until 4-23-07 and watch all the fireworks when the two knock heads again. (AMD/Nvidia) I still think about my 7800GTXes which cost $589ea a little over a year ago. Now they are worth SHiiittt.

Steve, there isn't a way to make better use of the memory. Trying to do so would defeat the whole purpose of SLI. See, each card has a GPU and memory controller and ram all specced to work well together. So, one GPU running needs ALL of the bandwidth of the memory it is soldered to to work well.

So there's no way for 2 cards to each "share" a common pool of memory and hence give you the ram of both cards combined. Sorry.

Habeed, once again thanks for explaining the underlying technology. I'm glad with my choice of vid card. I've been without a good computer since before Christmas waiting for AMD/ATI to release the R600 and I just couldn't wait any longer. I'm just hoping that when I do decide to upgrade to another set of vid cards I won't have to upgrade my mobo because of new bandwidth requirements and PCI 2.0.

P.S. I'm using a 266mhz Gateway right now LOL. I've been using it for months so when I do get my new comp up and running it's going to feel like lightning!!