'Made with Unity' games that run hot CPU and GPU

Temperatures of CPU and GPU are a function of work thrown at them. The more work they have to do, the hotter they get. Furthermore, since both CPU and GPU are in close physical proximity, one getting hot will likely warm up the other one too.

That said, a computer with adequate cooling should be able to withstand 100% load on both the CPU and the GPU without any issues. If it can't, it's the issue with the computer, not the software it's running. Since software cannot load the CPU or the GPU more than 100%, no software can be blamed for overheating your computer (this includes the Unity engine). You'll probably see it in any game that puts enough pressure on the CPU or the GPU.

However, that doesn't solve your problem. There are two ways to do it: increase cooling capabilities (get a cooling pad for your laptop) or decrease the load on the CPU and the GPU.

Decreasing the load on the CPU/GPU is a matter of making the games run at lower frame rate. Since you mentioned you disabled all graphics settings that had on/off switch, I assume you also disabled VSync, which will make the game run as fast as it can on your system regardless of the display refresh rate. I would first try enabling that, and if it doesn't help, try using an FPS limiter to reduce frame rate even further.

I'm not aware of any such bugs existing. If you have a reference number for it, I could shed some more light on it.

 

Now this is just anecdotal and not hard science, but something I've personally noticed over time. I've been a developer with Unity for about 10 years now. During the Unity 4.xx timeframe I don't ever recall my GPU or CPU fans ever really spinning up for ANY Unity build I was testing. Didn't really matter what I threw at it. Nowadays using Unity 2018.xxx almost every Unity build I run spins up either or both of these fans loudly. Mind you have brand new workstations built specifically to be quiet machines. At first, maybe a couple of years ago I thought this was coincidence or maybe the one machine. After quite a bit of time had passed I noticed the same spinup on my AMD laptop fans...just about every time. I don't know what that implies. I figure it has to do with the complexity of default Unity builds now, with realtime GI and things like going on versus Unity 4.xx which had much simpler lighting and effects.

 

Multithreaded workloads are also more effective at warming up your room since the CPU is now doing more overall work. Unity has gone a long way to parallelize parts of the engine compared to 4.x.

 

I figured as much. I wish that had all translated into faster and better quality lightmapping or better performing mobile builds or even a snappier performing editor. Last year I was making test builds using Unity 4.7 versus Unity 2018.1 and the editor was lightyears snappier and more responsive in 4.7. My lightmapping in Beast worked beautifully and baked quickly. In 2018.1 my lightmapping was all sorts of borked and took nearly 3 times longer. My builds consistently ran faster with a more consistent and even fps across them in 4.7. I can't say all of this "parallelizing" has made the end user experience any better.

 

60°C is barely halfway to overheating territory. It's nothing to worry about.