this post was submitted on 21 Jun 2026
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I'm getting like that for Unity games.
No idea what it is but just about every unity game makes my CPU run hot and starts pumping 40 degrees C air into the room.
What? Which ones? Escape from Tarkov is the most expensive Unity game to run that I know of, and it doesn't have this issue.
The issues with UE5 aren't the base engine. It's Nanite and Lumen, and how easy they make them to just toggle on. Unity doesn't have any features like this. You can get things like them on the store, but they aren't baked in. They do have ECS, which is designed to have a ridiculous number of entities operating at once. I could see how that could cause this issue if unoptimized, but not many games are using it yet so it's not what you're talking about.
Raft, Software Inc, Tinberborn, Big Ambitions. None of those are heavy games, but all of them make cook my i7-9700K
Guess when I launched Raft and it hit high 50 degrees and when I exited the game.
High 50s isn't actually an issue for any modern CPU I know of
Yeah high 50s is actually excellent for a CPU under load...
Problem is it then pumps 40 degrees temps into the room which sucks when the temp is already in the 30s.
That’s exactly what’s going to happen with any CPU with a TPD of 95W and 30+ degree ambient temps.
Your CPU is actually running extremely cool if your temps are only hitting the 50s in that scenario.
You need to fix the rooms airflow.
Yeah, that's almost certainly not because of Unity. At most, it could be blamed on C#, if we're blaming the technology. This is an issue with their simulation I would assume. For example, Timberborn is simulating liquids and a population of workers. The liquids are probably the biggest culprit, and there's a reason you don't see many games doing it.
All the games you listed are simulation games though. They are going to be the largest CPU hogs you can get, especially when you use the highest simulation speed possible. At that point, they're usually literally maxing out your CPU and running it as fast as it can process. As another example of this, Paradox games can not reach their highest speeds on weaker systems or later into the games. They run as fast as the CPU can process, which means nearly 100% utilization. It's not because they aren't efficient. It's because you're telling it to go all out on processing.
The CPU isn't anywhere near maxing out though.
I think it's limited on the cores it runs on or something - mine chugs on big maps with lots of water without going over 30%, which would be 4 cores running at full.