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@metachi I hadn't heard of this problem and just did some research into it. It also affects 2011 iMacs and my serial number is one of those.
i would sell it now if i was you. yes GPU might have been replaced but with yet another time bomb. there is no fix. i do microsoldering for living.
any 2011 macs with dedicated GPU should be avoided. Also 2011 macs are vintage according to apple, so they wont touch it now.
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