Was looking forward to the 64 bit client, did have some bad performance running PTR. But I thought its just normal PTR being laggy, so I just checked out the live version and I'm getting really terrible microstutter. This is a reasonably fresh windows 7 install and the game is running from a non operationg system SSD, I have a GTX 770 and an i7 with 16 gigs of ram. Basically I should be ok, I have tried various options and nothing in games seems to improve things. I am about to check for new display card drivers. Has anyone else had bad performance on the new 64 bit client ?