http://www.techreport.com/onearticle.x/10569
edit: forgot to mention, the 7900GS will be launched Aug 30th @ $199
The card will reportedly be clocked at 550MHz with 24 pixel shader processors, 512MB of 700MHz memory (1.4GHz effective), and High-bandwidth Digital Content Protection built in as standard. Official pricing will be $299, just like the current GeForce 7900 GT that clocks in at 450MHz/660MHz by default and has half the memory. The GeForce 7950 GT really looks more like a GeForce 7900 GTX with 100MHz lower core and memory clocks and added HDCP support, which could make it a tantalizing choice for overclockers.
edit: forgot to mention, the 7900GS will be launched Aug 30th @ $199