You are right on in your directions. I chose the 8500LE to replace the MX2 200 in my AMD650, PowerColor MB, 256MB PC-133 to play Age of Mythology, MW4, MW4BK & DiabloIIE. I was having frame rate problems with AOM and wasn't sure if it was cpu or gpu that was at fault. The 8500LE took care of these problems pronto. MW4 is noticeably better with the 8500LE, both front and rear views. I didn't see any difference in DiabloIIE. I got the 8500LE for $71 and the cheapest 4200 was $110. The latter isn't 55% better. I am saving the $39 towards a NV30 class card when I build a new rig later.