yes the GTX 280 1gb would be a nice upgrade to your SLI 8800GTX and no your sli setup is still like 768mb mirrored with both in SLI.
If money isn't an issue then get the GTX 280 but I would go with GTX 260 216sp if that was me. And for the price you're paying for the GTX 280 why not go for a HD 4870X2?
Hope that answers some of your questions.
If money isn't an issue then get the GTX 280 but I would go with GTX 260 216sp if that was me. And for the price you're paying for the GTX 280 why not go for a HD 4870X2?
Hope that answers some of your questions.