Test my memory? It's about 1-2 months old kingston hyperx 8gb and it doesn't cause problems on more demanding games eg. BF3, Dirt 3 etc. so i'm a bit confused as why it happened to a newly bought game from steam.
PS. it hasn't happened the rest of the day while playing Ghost Recon
It's kicking out the file win32k.sys as a source of the BSOD.
You can try some of the methods found HERE
and see if it helps alleviate the BSODs.
As for running memory tests, I would definitely do it whether it is new or not. It could be a defective stick only throwing errors when the computer is barely stressed.
I would recommend creating a Hirens Boot CD
and utilize some of the options available to attempt to resolve your issue and run the memory tests.