BSOD while playing a variety of games, BSOD references DPC

I have a 1 year old Toshiba Satellite A660:
i5-450m
Windows 7 Home premium 64bit OEM original install
4GB of ram
Geforce 330m 1GB

Recently while gaming I've been experiencing BSODs and on the blue screen it'll say something about DPC. I'm not sure what's causing this and in reliability moniter it'll usually have something about Windows failing a bugcheck a minute or so before the BSOD the bugcheck states:
The bugcheck was: 0x000000b8 (0xfffffa800a2b1b60, 0xfffff880033ddfc0, 0x0000000000000000, 0x0000000000000000)

attached is the zip file as per stickied thread

EDIT: Tried reinstalling graphics card drivers, did not solve BSOD

Before I get into anything too fancy, could you do me a favor and just reinstall your graphics driver here?
It's the faulting driver in 90% of these dumps.

There's not a whole lot more to go on. Could you upload the newest minidump files in c:\windows\minidump?
I can have another look and see if anything has changed in the dump files.
The ones I looked at the first time were pretty consistent in blaming the graphics driver though.

oh sorry you will need to zip them first.