crwdns2934241:0crwdne2934241:0 thierry

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Some of the bigger (15" - 17") MacBook Pros had 2 GPUs. The one, low power, soldered to the motherboard, and the second, high power and only activated on demand by certain apps, was on a little extra circuit board. I've read somewhere that on these models, the secondary GPU could be upgraded.

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open