So I've been preparing for ES:O by playing MMO's, WoW, Lotro, Star Trek Online, SWTOR. What I don't get is, games like Deus Ex HR, Oblivion, TF2, Minecraft, and other low end games run fine on my PC. WoW and Star Trek Online work fine, but Lotro and Swtor lag like crazy, my internet connection runs HD youtube vids, and online games all the time. Why is this?
CPU: AMD Athlon 64 X2 Dual Core Processor 4200+ 2.20GHz
GPU: Nvidia GeForce 8400 GS