Analyzing BSODs

[lego batman]

Hi everyone,
Please could I get help with analyzing why my computer keeps crashing?
It started happening just recently - different BSODs would come at random times and without me having made any changes to drivers or hardware.
I tested the RAM with memtest and I got 1540 errors in 7 passes, without overclocking!
I tested one stick on its own and it was fine. I'm just about to test the other one, but before I RMA that stick (if it has problems), please could you look at the minidump files and see if it is likely to actually be a memory issue? I don't want to RMA both sticks (they are matched, supposedly), leaving me without a computer.
Here are the minidump files:
http://dl.dropbox.com/u/4580001/Minidump.zip
Many thanks

[oolon]

Before you RMA it you could try underclocking your memory, try testing the memory all in one channel, I had a P4 system that could not run at DDR400 dual channel however was fine on DDR333 or signal channel, I replaced the memory and the board.

All try replacing your motherboard battery I recently bought a (new) board that was not stable, replaced the cell in it (dated '97) then it worked fine.

[lego batman]

Thanks. I'm trying underclocking it now, running it at 600mhz with both sticks in, hopefully that will show up and problems. I also am putting a bit more voltage through it to see if that will help, although I don't know why these problems have suddenly started.
Will report back (unless computer dies)!

UPDATE:
RAM now clocked at 600mhz, so 1:1 ratio.
Went through 1 pass with with memtest before I needed my computer and found no errors. This is good - thanks oolon!
Still, if anyone can find any clues from the dump files I would be grateful to hear them!