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Discussion in 'iMac' started by karnashuk, Oct 1, 2013.
guys, do you think I can upgrade from Geforce 680 GTX to NVIDIA GeForce GTX 780M with 4GB of GDDR5 ?
Not unless you buy a new 2013 iMac.
Yes, the GPU would be basically impossible to replace without breaking your computer - it's very hard to disassemble then put back together again and the software probably wouldn't recognise the upgrade - rendering you without a GPU - excuse the great pun there.