Potentially your problem could be solved by modifying files (i7-4790 has been used in Hackintosh's) but that is outside of my realm of knowledge. Even though my usage revolves around video transcoding I couldn't quantify the difference between those two (10-15% benchmark difference, 5-10% real world) for more than 50 bucks. You lose 100mhz clock and hyper threading with the 4670 but the difference will only be noticeable in very slow and heavy CPU intensive task. I think your best options will be another i7-4771 or if you want to save a bit the i5-4670.
I would selfishly love to see you try it so I could potentially do this upgrade in the future. While I would love for you to try a 4790K, it does have a higher TDP (88w vs 84w) so if there was a alteration of the heatsink with the 5k iMac (4790K was in the 5k iMac btw) you could run into throttling problems. I would recommend sticking to CPUs of that iMac year. Since the 4790 isn't officially supported this is likely your problem. The CPU needs to be supported by MacOS for power management. Trying to predict the questions that may come. Prodam iMac 2013 late zakoupeneho na zacatu roku 2015 pocitac je v dobrem stavu jede jak hodinky je lehce otukana noha pocitace viz foto. In total I'm down over £600 and still don't have a working machine. Now I have (apparently) 2 functioning logic boards and 1 CPU and they don't want to play. So maybe the logic board is not damaged after all. i've just spent the afternoon switching the motherboards and CPU.Įxactly the same result as the old logic board. 4 days later a new mother board arrives with no CPU. So, I draw the conclusion that the mother board is damaged. Now I found this thread and looking at the costs and delivery times I purchased the 4790 (Not the K) instead of the 4771 that was shipped in the machine. Put the heat sink on and then invert the whole logic board to insert the screws and spring from underneath.ĭisaster! The CPU slipped and I wound up crushing the edge of the chip!ĭon't panic, stiff upper lip and all, lets get a new CPU before my wife finds out.Īmazon to the rescue. On this model you have to put the CPU in the socket put the 'gunk' on.
So I took the heat sink off, cleaned it up and reapplied. New hinge in place I though - well whilst I've got it stripped downs so far, I may as well replace the thermal paste with some Arctic Silver 5. Having purchased a new hinge and the required strips to reseal the machine once I'd finished I proceeded with caution. So the hinge failed on this machine and, knowing my way around the iMac and other machines, I decided to change it myself. IMac 2013 27" 3.5GHz Nvidia GT780M 4GB (This may or may not be important)
This is what happened to me and what I have done so far. I don't know if anyone is still reading this thread.