BSOD while playing battlefield 3

Hey, this is my first time on this forum and i hope someone can help me. I have been getting random blue screens while playing Battlefield 3. They occur at different times, sometimes right away, and sometimes after hours and hours of playing. I have used blue screen view and it seems like it is constantly a atikmdag.sys problem but I have attached the report from blue screen view Dump.txt

I have updated all my drivers to the latest including my motherboard and graphics card drivers

My Pc Specs are as follows:
Motherboard: Gigabyte P55A-UD4P
RAM: 4x 4gig DDR3 1333mghz Kingston
Graphics: Crossfire Saphire HD5870s
Power: 1200watt Huntkey

If someone could help me it would be much appreciated, as it is starting to worry and annoy me.

Thanks

Hello and welcome to the forums.
First make sure your machine is configured properly to facilitate the collection of .dmp files.

Go to Start and type in sysdm.cpl and press Enter

Click on the Advanced tab
Click on the Startup and Recovery Settings button
Ensure that Automatically restart is unchecked
Under the Write Debugging Information header select Small memory dump (256 kB) in the dropdown box
Ensure that the Small Dump Directory is listed as %systemroot%\Minidump << where your .dmp files can be found later
Click OK twice to exit the dialogs, then reboot for the changes to take effect.

Then:
Please read the first post in this sticky thread here How to ask for help with a BSOD problem
Do your best to accumulate the data required.
Run the SF Diagnostic tool (download and right click the executable and choose run as administrator)
Download and run CPUz. Use the Windows snipping tool to gather images from all tabs including all slots populated with memory under the SPD tab.
Likewise RAMMon. Export the html report, put everything into a desktop folder that you've created for this purpose, zip it up and attach it to your next post (right click it and choose send to, compressed (zipped) folder.
Good luck
Randy

EDIT: And when you have the time please fill out your system specs. Help Us To Help You By Filling In Your System Specs.