Hi,
RAM will wear out with use and of course some sticks will wear out faster due to inconsistencies
in production. The tolerances for fast memory are unbelievably tight. High or low voltages, static
electricity, physical damage (dropping), excessive heat, and moisture are just some of the ways
RAM can be damaged. OverClocking also can cause damage to the memory.
Beginners Guides: Diagnosing Bad Memory
http://www.pcstats.com/articleview.cfm?articleID=1565
Hope this helps.
Rob Brown - MS MVP - Windows Desktop Experience : Bicycle - Mark Twain said it right.