I agree with you, and I was searching (and found) an answer to the same problem. However, I think its foolish for you to make another post when your just saying the same exact thing. Get some more RAM, its cheap.
I, on the other hand, am having the same problem with 4GBs of RAM (6GB actual) with a GTX 570, so MY problem is odd, and I will be making a post about it.
Go buy some more RAM, and try to run it in Win XP mode if you have Win 7.
