Somewhere near geforce 3 ti500. but really depends on which 3d benchmark you're talking about (at the highest resolution, the lead may change). for example, in 3dMark 2001, ati 8500 is about 500 pts.faster than a geforce 3 ti 500 (based on madonion's benchmark info. on its website). in many game benchmarks, however, the geforce 3 ti 500 (even ti 200) beats ati 8500 at the 1024 resolution and below. radeon 8500 is much more feature-packed though.
Edit: I just saw "LE" next to 8500. It will be a few frame rates slower than a reg. 8500.