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What are those white stains on the back of this GPU?

babbo
By babbo
in Graphics Cards
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Posted

I've got this used GPU which has some white stains on its back. What are those? I've searched the web and from what I understand they could be flux residues but I'm not sure. Any other idea? Looks like this GPU was removed from a working PC and it was still functioning when it was removed. Then it sat in its own box for maybe a couple of years and now it was given to me. I've not tested it yet and I'm not sure if it's safe to power it on before removing that white stuff. Anybody knows what that is? Is it harmful? Should I worry? Can I leave it there or should I clean it even if the GPU works? I don't know when those white marks appeared, if the card was sold like that or if they appeared later during daily usage.
Thank you all for any help.

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Posted

They are most likely flux residues, which weren't properly cleaned off during production.

Completly normal.

 

You should be able to clean it off with isopropal alcohol, if you want to.

 

 

 

 

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Do they compromise the card in any way?

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