Hey diddy,
I'm showing memory corruption on all of those logs, it looks very very much like you have a faulty stick of memory there.
You can use memtest to test for faulty memory,
- If you have a floppy drive and a spare floppy disk, please download:
http://www.memtest86.com/memtest34a.zip
- If not, please download, unzip and use nero to burn this image:
http://www.memtest86.com/memtest86-3.4a.iso.zip
The faulting address appears to be quite far in, so memtest may take some time. For the same reason, it wouldn't suprise me if those problems were occuring when your playing games, or when you have a lot of apps open (actually utilizing that much memory).
Another way to test memory (assuming it's only one faulty stick of memory) would be to remove one at a time and test.