The NVIDIA GeForce 8600M GT is the mobile version of the NVIDIA GeForce 8600 GT. However, instead of being based on the G84 GPU used by the GeForce 8600 GT, it is based on the smaller G86 GPU used by the GeForce 8500/8400 graphics cards. The G86 GPU only packs 210 million transistors, which 79 million or 27% less than the G84 GPU. The result is a smaller and cooler mobile GPU.

Even though the GeForce 8600M GT is based on a different GPU, it is similar to the GeForce 8600 GT desktop GPU in specifications. In fact, the only difference is the GeForce 8600M GT runs at 475 MHz while the GeForce 8600 GT runs at 540 MHz. So, is the GeForce 8600M GT almost as fast as its desktop counterpart? Read on and find out.