Grading
Military grade components are not just some fake statement, there have always been parts that have a notably wider temperature range for starters that are slightly more expensive (not even by that much most of the time), and those are usually known as 'military grade' since the army has a set of requirements defined, and the difference in temperature specs isn't just 1 degree either.
So when you have part on a PCB that gets hot and stays hot for extended periods (or get very cold, below 0C/32F) then it can pay off to have the components be more sturdy than standard, it should extend their lifetime also.
Now if that's needed on a budget model GPU is questionable, but on an expensive HD5870 or Fermi or something that would be nice.
Military grade components are not just some fake statement, there have always been parts that have a notably wider temperature range for starters that are slightly more expensive (not even by that much most of the time), and those are usually known as 'military grade' since the army has a set of requirements defined, and the difference in temperature specs isn't just 1 degree either.
So when you have part on a PCB that gets hot and stays hot for extended periods (or get very cold, below 0C/32F) then it can pay off to have the components be more sturdy than standard, it should extend their lifetime also.
Now if that's needed on a budget model GPU is questionable, but on an expensive HD5870 or Fermi or something that would be nice.