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Swapping GPU's, replacing 6770M with 7490M on late 2011 failed board?

MacBook Pro - MacRumors Forums - forums.macrumors.com
Hi,

My logic board failed again. The first two replacements were on Apple but now that the machine is vintage I can't even get a new board from Apple at my own expense. I am presently running on the EFI fix but am not convinced it is working completely. (I have intermittent issues with start up, occasional black screens that take 20 tries to get past.)

So I was looking into having the board "Re-balled." At least I think that is the term. I am still not clear whether it is the actual 6770M chip that fails or just the lead free solder that is holding it in place. I know the lawsuits blamed the problem on the lead-free solder but did it actually damage the chip along the way?

Now, I live in Eastern Europe, so not a wide variety of options here. Although they can be resourceful. I emailed a place that specializes in repairing motherboards of all kinds. I explained the lead-free issue to him and I got the response below. He wants to replace the 6770M with a 7490M. He thinks its a problem common to many discrete GPU's, says it has nothing to do with the lead-free solder. I don't get the feeling he deals with a lot of Macs.

I don't know how to read chip specs. Here are the links.
Date: Jan 14, 2018   


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