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I have a Late 2012 iMac 27” Core i7 13,2 A1419 - 2456 and I’m considering upgrading either the logic board or CPU for better performance. The current CPU is a 3.4 GHz Quad-Core Intel Core i7 socket 1155. I’m unsure of what compatible logic boards would go in this machine Any help gladly accepted cheers
@honkin your iMac can use: 3.4GHz i7, GTX 675MX 1GB Apple part number 661-7159 3.4GHz i7, GTX 680MX 2GB Apple part number 661-7160 3.2GHz i5, GTX 680MX 2GB Apple part number 661-7158 3.2GHz i5, GTX 675MX 1GB Apple part number 661-7157 2.9GHz i5, GTX 660M 512MB Apple part number 661-7156
The best upgrade you can do to increase your speed is to install an SSD.See step #32 of this guide. And you transposed the EMC # iMac Intel 27" EMC 2546 Hard Drive Replacement
@honkin - From your added info I think you have a different issue than a CPU performance issue. I’m suspecting you have a RAM issue or a storage type of issue. I would run the onboard diagnostics to see is anything pop’s with it. Restart your system and Press the D key. did you get any errors? Reference: Mac startup key combinations Can you give us a bit more on your RAM how much do you have? Also what are your SSD’s make and models and how much free space do they have? And lastly the macOS you are running.
