GeForce 8600 GTS:
GeForce 8600 GT:Codenamed G84-400 256MB GDDR3, 128-bit memory interface No HDMI yet Replaces the 7950GT and 7900GS 700MHz core , 2GHz memory Dual D-DVI, HDTV, HDCP requires external power Price: between $199-$249
GeForce 8500 GTCodenamed G84-300 256MB GDDR3, 128-bit memory interface No HDMI yet Replaces the 7600GT 600MHz core, 1.4GHz memory G84-300 has HDCP and G84-305 model not. External power for HDCP isn't required. Price: between $149-$169.
256MB DDR2 memory Replaces the GeForce 7600 GS 450MHz core, 800MHz memory G86-300 has HDCP, G86-305 model not. Price: between $79-$99.