Hello. I installed UE5 on my 2020 iMac 27" and my CPU maxes out when I launch the program. My CPU temps jump to over 200F/93C. Why is this happening? My iMac specs are as follows:
-CPU 3.6 GHz 10 Core Intel Core i9
-Memory 128 GB 2667 MHz DDR4
-GPU AMD Radeon Pro 5500 XT 8 GB
Thanks
It’s getting warm, because it’s using a lot of CPU and the iMac is quite slim, and thus doesn’t have a lot of space to do cooling in. It’s using a lot of CPU because the editor program is working hard.
If this is the first time you open the engine, or open a particular project, it’s likely because it’s compiling shaders. This can take a very long time, especially on the Mac where the Apple-supplied Metal compiler is pretty slow.
But, in general, running a full 3D editor at high frame rate just takes lots of CPU and GPU work. It’s not like a video editor or whatever, where most of the time, the computer does nothing. The editor renders the full world, at full fidelity, at as high a frame rate as it can, to give you a smooth 3D navigation experience.
Also, Apple generally tunes their hardware to be very nice and quiet at low load, because they know most of their users go nowhere near the peak of their systems limits most of the time, but they don’t tune them to be quiet at high loads; instead they tune the systems to be thin and small. You’ll need something like a Window system with a water cooling loop for a system that is quiet under high load.