Laggy...

[Poison elf]

You can by more Ram, but first you should check out some things I think. The server you were on if there were a lot of people it was probably a busy server. If you want to compare to another computer test on the same server.

Even with a new computer I would check and be sure the graphic drivers are up to date, you can check that under the community site, if yours needs updating.

Under display you can move your hardware acceleration down, and turn enable write combining off. But this usually helps more with cuts and fragments in the scenes.