Girlfriend has Compaq pc with 2.2ghz Sempron 3800. I have researched and computer can take up to a 2.4 ghz Athlon so this would be the 3800 Athlon 64. When I use the computer I notice it's kind of on the sluggish side even with just regular web browsing, etc. and wondered if it would be worth paying the $60 or so to get an Athlon? Is the only difference the difference in size of chache memory? If it would take the X2 processors then it would be a non brainer but it doesn't. The system ahs 512 meg of memory and runs XP.
