ReactorCritical shows the way to almost fail-safe identification of your Radeon 8500 in terms of clock specs: Look at the back of your card. Identify your card via the P/N Number on the backside sticker: RADEON 8500 (275 MHz): 1028571100 RADEON 8500 LE (250 MHz): 1028571200 RADEON 8500 LELE (230 MHz): 1028571500 The 102 in the PN means ATI. The next three numbers is a modification of PCB, "857" in case of RADEON 8500. The next four figures is technological information. Thanks to RC for the information.