In order to clarify the difference between old and new 8800GTS cards, Hardware Canucks got their hands on new 8800GTS 640MB. EVGA's SSC board now has 112 processors, same number as recently launched 8800GT. Here's an excerpt:

Without a doubt, the EVGA 8800GTS SSC Edition with 112 Stream Processors has found its niche in the market. If you are one of the many people looking to purchase a 22" or larger widescreen monitor and play games with high details and IQ settings, this card should be at the very top of your list. This card has shown itself to be superior to the extremely popular 8800GT 512MB when playing DX10 games with large textures. Indeed, EVGA has fitted this card perfectly into vacuum created by the discontinuation of the older 8800GTS 640MB.

Was I impressed with the EVGA 8800GTS SSC? Yes, I was but I have my reservations about recommending it outright. Let's be honest; most customers don't play at ultra high resolutions with high levels of AA and AF enabled and it is here where parallels between the new 8800GT and this card will be called into question. The SSC carries a nearly 30% price premium but it performs on-par with the GT at lower resolutions. On the other hand this new 112 Stream Processor equipped GTS is able in most cases to manhandle the stock 8800GT at higher resolutions and in games with larger textures or more detail. Another unfortunate occurrence is the complete lack of 8800GT cards on the market today; there are long backorder lists at popular retailers and consumers may be looking for an alternative. If you are willing to pay the extra $75 (or thereabouts) for the 8800GTS with 112 Stream Processors, you will not regret your decision.