Since so many people have lag issues and Frames-Per-Second slowdown during large raids, Mythic posted the minimum and recommended requirements. I personally do not fulfill the recommended requirements, but I'm almost positive there's a shiny new video card and RAM upgrade sitting under a pine tree in my house! If you are missing some requirements, it would be best if you upgraded your system.
The minimum system specs you'll need to play Camelot are:
If you have a Pentium II:
PII 450
256mb RAM
600mb free hard drive space
32mb 3D accelerated video card
If you have a Pentium III/IV:
PIII 450
128mb RAM
600mb free hard drive space
16mb 3D accelerated video card
(Please note that Voodoo 1/2/3/5 cards are not supported in Camelot, although Voodoo 3's and 5's may work).
The recommended system is:
PIII 1ghz
256mb RAM or higher
32mb 3D accelerated video card