The NVIDIA GeForce 7800 GS in its current state is based on the G70 chip (listed as revision A1) with cut down pixel and vertex pipelines. The board layout is based on the 7800 GTX 512 board with all the RAM located on the front side of the PCB. Of course, the RAM used is the same type used on a 7800 GT (1GHz 8x32 GDDR3) rather than the super fast 1.7GHz 16x32 GDDR3 chips used on the 7800 GTX 512. This also means the board is equipped with 256MB of RAM using a 256bit interface.

Since the performance of the part falls between the 6800 GS and the 7800 GT, we took a look at what those parts cost in order to get a lay of the land. The 6800 GS is priced between $200 and $230, and the 7800 GT comes in at $320 to $370. If we look simply at averages, this would mean we should expect the 7800 GS to be sold between $260 and $300 if 7800 GT prices stay stagnant - but most likely lower if the 7800 GT prices move before the 7800 GS launch. NVIDIA roadmaps confirm that even though GeForce 6800 GS will reach sub $190 levels by the end of the year, the product will not actively be continued.

At the same time, this part performs in the same class as the X1800 XL. While the ATI card fairly consistently beats the 7800 GS in these benchmarks, the fact that that the 7800 GS keeps up at all (and will cost even less than the 7800 GT) means that it would be very difficult for this card not to have a lot of value. Of course, if this part debuts at the high end of our estimate, a cheap 7800 GT would definitely be a better way to go. There are some rebate and coupon offers that can get you a 7800 GT for $300 right now if you look hard enough.

We are quite excited about this part; the sooner it arrives the better. The 7800 GS will be a great part for people who can't decide between the 6800 GS and the 7800 GT. Hopefully the introduction of the 7800 GS will also allow the price of the 6800 GS to get pushed down a little more without leaving a huge gap between it an the next higher performing part