The 1800+ is still a completely viable chip, there's no need to get a new computer. You didn't note whether you're running SDR or DDR, and that makes a difference. I'm running a gig of PC2700 with my 1800+, and never have problems with my system. Like others have said, invest in at least doubling your RAM first and foremost, and then get some extra storage and Windows 2000 or XP Pro. :)