Currently a GeForce 7600GS will set you back $110, while the 7600GT is slightly more expensive at $150.
Both are based on the G73 architecture which uses a 90nm fabrication process. While the 7600GS is now available in either PCIe or AGP form, the 7600GT is at present only available using the PCIe bus. The 7600GS can come configured with either 256MB or 512MB of onboard memory, while the 7600GT tipically comes with just 256MB worth of memory buffer. Both of the GPUs feature 12 pixel pipelines, 1 TMU (Texture Mapping Unit) and 5 VPUs