The NVIDIA GeForce 8800 GT will come in two flavors, one with 512MB and second with 256MB and both will work at the same clock speed. This time there won't be a GTS and GT or a faster version and the slower one. NVIDIA will simply call this card the GeForce 8800 GT 512MB or the GeForce 8800 GT 256MB. They will both work on a 600MHz GPU clock and the memory will be clocked at 1800MHz but some overclocking partners will come along with GPU and shader overclocked versions overclocked cards. This might be a bit confusing for the end user, but then again whatever makes it run faster is just fine by us. Exactly what quite some brands already did with the GeForce 8800 series. - FudZilla

Upcoming GeForce 8800 GT Runs at 600/1800MHz Speed

Now documents indicate that the G92 aka the GeForce 8800 GT is not Shader Model 4.1 compatible. It can mean one of two things, one, that NVIDIA doesn't want to release the information or two, simply that this chip doesn't have support for Shader Model 4.1 and DirectX 10.1. This comes as an interesting surprise as we know that the RV670 aka the Radeon HD 2950 series will support Shader Model 4.1 and DirectX 10.1. We will ask around and try to find out if this is the case, but this would be a big setback for NVIDIA, at least when it comes to feature tick boxes on upcoming games.