We have had a look at the 320MB version of the NVIDIA GeForce 8800 GTS graphics card offering a few times in the past. We have looked at it in its stock form, overclocked and in SLI configuration. With in excess of 1.28GB of memory on offer when the 640MB cards are enabled in SLI mode, you have to wonder are we simply at a point of overkill. Are the 640MB cards for non SLI and the 320MB cards for SLI operation? While some companies have pulled the 640MB card from production, there are still a large number of companies offering them till this day. So today we are going to be re-focusing on this situation but when the cards are used together in SLI mode. - TweakTown

NVIDIA GeForce 8800 GTS 640MB SLI Ready Review

To be completely honest, we didn't really know what to expect performance wise going into this article. While the 640MB graphics card did perform better in a single card showdown, when you move to SLI mode and give the 320MB an extra 320MB via the second card, are we going to be maxing out the amount of memory we really need? Surely hitting in excess of 1280MB of onboard memory would just be useless? Actually, it doesn't seem that way. We can pretty much see across the board that the 640MB cards in SLI continue to give us a performance increase when compared to the 320MB versions.

If you're serious about gaming, the chances are the 640MB cards are what you want, but if you're hardcore to the extreme, the chances are you're going to be looking down the barrel of a pair of uber high-end GeForce 8800 GTX cards. It is all very interesting though considering you have graphics cards with the same chip, exactly the same core and memory speeds with the only difference being the amount of onboard memory but of course about a 33% price difference. It's clear a difference can be seen at these higher levels even when SLI comes into the picture.

Consumers listen up, the problem though is that people may well read this and then go out and buy the 512MB version of the Radeon X1300 instead of the 256MB version of the Radeon X1600, because the first model has more onboard memory. Yes, more memory does make a difference but...and this is a big but, you'll only see a difference when the right amount of power is behind it. As most low-end graphics cards don't have any real advantage with the extra memory, think about this and listen to us and not the sales person who thinks they know everything.