[SOLVED] Copper layer on gpu heatsink corroding?

[TheHardwareStudent]

Today I wanted to repaste my gpu. It had the factory paste on it till today. (It never has been watercooled or the heatsink removed) I looked at the heatspreader and the copper seamed to have tiny dents and the aluminium was showing trough and partially gone. Here are The pictures. Is it okay to just repaste it? Should I sand it down? Should I buy a new block?

 

[Zerk2012]

Today I wanted to repaste my gpu. It had the factory paste on it till today. (It never has been watercooled or the heatsink removed) I looked at the heatspreader and the copper seamed to have tiny dents and the aluminium was showing trough and partially gone. Here are The pictures. Is it okay to just repaste it? Should I sand it down? Should I buy a new block?

That is fairly common and is part of the reason for using the paste along with transfering the heat.

It will work fine like it is.

 

[jay32267]

I'd repaste it and check the temps.
The paste should fill the voids.
If I didn't like the temps....I'd change the block....but I'm thinking the temps will be OK.
I don't think sanding is going to help anything.