4x monk serious lag

hi guys! im running ISboxer with 4x tempestrush munks. having som serious lag in certain combats and when going through wp/tp or different maps.

current setup
Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
6GB RAM (3x2GB)
AMD Radeon HD 6900 Series

got any suggestions? any help very much appreciated

running with 2x monks works almost flawless

[Mahther]

Have you turned down all in game graphics settings for all accounts? It should look like this, ideally with your resolution as high as possible. http://i.imgur.com/FuIq2.jpg

If you've already done that, I have one more thing to try as a last resort.

I would recommend overclocking ur cpu to 3.6-3.8ghz at the least, which isn't to hard with the i7 920. But tbh you won't see much of an improvement if you have already lowered ur graphics and resolution in game, an upgrade in ram and gpu would be ur best bet