Memory management can be ram or software, as memory includes the page file as well as ram, so the problem could be a driver instead of Ram
can you download and run who crashed:
http://www.resplendence.com/whocrashed
it will create a summary of the bsod and the codes it provides might show us the cause
Copy/paste results here and I see what they say
You could run the free version of http://www.memtest86.com/ on your ram, one stick at a time, if you find any errors its 1 too many, would need to replace stick.