I appologize for turning this into a MORE RAM NEEDED thread. But here try this for shits and giggles. Your 5 wows is taking up ~1.7gb of ram. Your system has 3gb of ram. Remove 1gb of ram and see if you keep the same performance. One of 3 things will happen

1) performance will go down. Ok so maybe there is something screwy going on with task manager not showing it's actual usage of ram. I would argue that adding more ram will then increase your performance

2) nothing changes. Ok well adding ram won't help at all

3) performance increases. This is the best result you can go around selling services of removing ram and increasing performance.

All I can speak to is that I had some problems with toons losing follow in Shat on there epic flyers. Upgrading my ram helped this alot.