Chosen Solution

I’ve read on Hardmac that the CPU of this iMac could be upgraded from CoreDuo to a powerful Core2Duo. Have you ever done it ?

Yes, you can upgrade the Core Duo Imac, Here is a Guide

I finally replace my Core Duo on my iMac from 2006 by a Core 2 Duo 7400 !!! Il works great and the replacement was pretty much easy with patience. I also put a new power supply because the original, a rev.a, seems to cause unpredictable shutdown … il looks like a component not design by Apple but by my dumb neighbour with his feet ;-) Again, thx matthewfrey for your precious link. Cheers from France !

Yes and no! The CPU on these models are permanently mounted on the logic board. However, most all of the parts between the Model A1174 (with a 2 GHz Core Duo processor) and the Model A1207 (with either 2.16 or 2.33 GHz Core 2 Duo processors) are the same. Therefore, you could upgrade to the Core 2 Duo by replacing the logic board. I hope this helps!

Thanx Ben & thanx a lot Matthewfrey … I’m going to refresh my iMac ! Happy Xmas & New Year !!!