GeForce 8600GTS: The GeForce 8600GTS is also based upon NVIDIA's G84 core but ramps up the core clock to 675MHz and the 256MB of GDDR3 memory operates at 2000MHz. Gigabyte employed a very large passive heatsink on this graphics card.
GeForce 8800GT: The GeForce 8800GT was launched later than the other GeForce 8 GPUs and is built around the G92 core. The G92 on the 8800GT is running at 600MHz with a 1400MHz GDDR3 memory clock. This ECS GeForce 8800GT had 256MB of video memory. This graphics card requires an external 6-pin PCI Express power connector to operate.