[Troubleshoot] Ray Sum's Graphics card crashing (Part 4)

Continued from:

http://wai-pc.blogspot.com/2011/09/troubleshoot-ray-sums-graphics-card_25.html

As the laptop's Nvidia GT330M graphics card chip is labelled as 1GB (shared with PC RAM) I'd thought I'd double check that it wasn't this.  This also meant that I could leave it running over night untouched.
[Note that the system had also crashed once due to accessing invalid memory address!]
[System has 64 bit processor and operating system so should be able to access all of the 4GB RAM installed which detects perfectly in the BIOS and windows!]

Some actual specs for the graphics card here:
http://www.nvidia.com/object/product_geforce_gt_330m_us.html
And a quick review:
http://www.notebookcheck.net/NVIDIA-GeForce-GT-330M.22437.0.html

The utility used was the MemTest86+ RAM tester that came as part of a Live CD of Ubuntu 8.04!
Note that after 17 iterations of the test over 11 hours NO problems had been detected so the RAM should be perfectly fine.