You can check it out over here, it's all in Chinese but the benchmarks speak for themselves. It seems like NVIDIA has another hit on its hands, the performance of this card is very impressive for a midstream part.
The GeForce 9600 GT 512MB uses the 65nm G94 GPU and is clocked at 650MHz with 1625MHz shaders and 1800MHz GDDR3 memory. The card has a 256-bit memory bus and has support for DX10, DX10.1 is still only available on ATI's cards.
PC Online compares the card against the GeForce 8600 GTS 256MB, GeForce 8800 GS 384MB and Radeon HD 3850 256MB. A quick peek at the benchmark results reveals this new card offers a tad more performance than the GeForce 8800 GS in most benchmarks - even in very high resolutions. If this card is priced below the Radeon HD 3850 256MB things could get quite interesting.