Is it save to upgrade to i9?
I have an iMac Retina 5K, 27“, 2019 with a 3.7GHz i5 (and a Radeon 580X with 8GB of memory). I‘ll upgrade it‘s internal hard drives soon. When the iMac is open I could upgrade the CPU to an i9-9900k. But is it ok? Is the cooling sufficient for the i9? Does the main board deliver enough power?
I saw a video on youtube but that doesn‘t imply that it‘s ok.
So, I replaced the internal blade by a 970 EVo NVMe M.2 (1TB) which I used in an external case for some time. Additionally I replaced the internal hard disk by a MX500 (2TB) SSD. Again, I used it in an external case for a while.
Finally I replaced the i5-9600K by an i9-9900K. Both have a TDP of 95W. Replacing the CPU was not that complicated. I’m writing this answer on that pimpMac. So, SUCCESS!
I replaced the blade and the hard drive…and the CPU. And everything is working. After watching some YouTube video I was frightened to replace the CPU, but I did it. Easier than I expected. The WiFi part on my board is different compared to the board in the instructions. But no problem.
The performance comparison: iMac (27-inch Retina Early 2019) vs iMac (27-inch Retina Early 2019)
Basically, the i5 is in GeekBench: v5/cpu/840724 and the i9: v5/cpu/5685935