I've played minecraft on this machine before in the past and its never had a problem, its been able to play most games at really high quality without a hitch.
Windows 7 Home Premium 64bit
2GB ATI Radeon HD 7690M XT Graphics
Intel Core i7 26700QM 2.2GHz
I've installed all the latest drivers, 64bit Java etc. But when I play minecraft, after about 5 minutes it starts to get extremely laggy, then starts to stall and eventually stops and throws up the low memory error. I've never had this before. What gives?