Chosen Solution
Hi all, I have the iMac Mid 2011 - i5 2.5Ghz I am wondering what is the best possible CPU upgrade for this?
The best you can go up with is a 3.4 GHz Core i7 (I7-2600). You may want to look at upping your RAM and jumping to a SSHD or better yet add in a second drive in this case a SSD. Remember your system has three SATA ports!. Update (05/09/2018)
You can see the only the mc Geekbench values are higher. Keep in mind only multi-threaded apps will take advantage of the extra threads. I think you are better off upgrading the RAM & Storage, and its less work and risk.