I know this is a questions asked around a lot but would you see the 'copper mod' a worthy improvement to help prevent this issue?
Copper mod will not "PREVENT" the issue but it may delay the inevitable demise.
Even Apple had the issue with their Macbook Pro Models.
In July 2008, NVIDIA publicly acknowledged a higher than normal failure rate for some of their graphics processors due to a packaging defect. At that same time, NVIDIA assured Apple that Mac computers with these graphics processors were not affected. However, after an Apple-led investigation, Apple has determined that some MacBook Pro computers with the NVIDIA GeForce 8600M GT graphics processor may be affected. If the NVIDIA graphics processor in your MacBook Pro has failed, or fails within four years of the original date of purchase, a repair will be done free of charge, even if your MacBook Pro is out of warranty.
What to look for:
Specific products affected: