Well here I was all excited because I tried disabling HTT like arclight said and played for a few minutes.
I 'stress tested' running between zones, warping back to the ebon hawk, etc.
Wooh Hoo !
Till I got into some combat, a total lock with looping sounds
So game runs better but now it hangs up... Sigh.. I guess I will have to admit I lost 10 bucks