to be quite honest, client side hardware is quite irrelevant, even a faster processor and graphics chipset will yeild little improvement. The issue is with the game engine, not the hardware we run it on.
EE is not multithreaded, so multi core processors give minimal benefits. Additional core can only take over other programs running in background, not add to EE performance directly.
Graphics cards can improve frame rate in normal pve situations, but make little to no difference in TW, aven ch1 etc.
There is also substantial server side lag at times (like when you cant talk to npc, server busy msg etc) so dont be quick to blame your hardware