My GPU changed color..wth?

massa902

Honorable
Jul 9, 2013
312
0
10,790
I lent my PC to a friend and i told him that my GPU( Sapphire HD 6450 1GB) gets real hot and to keep an eye on the temp. Sure enough when i got the pc back the OS was so messed up and the HDD so slow i had to format evreything and i took the side off and now my once black heatsink on the GPU is now green is this bad?
 
Solution
Plastic shrouds don't change colour. If it's black painted copper, it may have corroded. This is a normal chemical process that can't be avoided.