Keeps crashing

I updated to 1.6.1 and this "bug" just started to happen. I would start playing and the frame rates would get really low and then it would freeze and say I have no more memory available and this just happens over and over again. I have had this problem before on my old computer.

Steps to Reproduce:
1. I log in and start playing
2. The frames per rate slow down dramatically as I play and finally freezes
3. then it says I have no memory available