How much pagefile size is set on your system? Try to increase it to summary size of your videocards videomemory.
Check drive where pagefile located on errors via My computer or chkdsk command.
I didn't see your post earlier and just checked - pagefile is at 24G, which was recommended and set by GGS when I installed it about a week ago. I have 2 cards at 4G each so this is more than enough based on your recommendation to match the size of the video cards.
I checked RAM and disk for errors overnight and no issues with either one.