AMD CPU cores not fully utilized

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Hey guys,

I just wanted to bring this "issue" to your attention (as many have tried before) to see if maybe CDPR can see this post and hopefully address it in a future patch.

The "issue" basically is that the game is not fully utilizing all CPU cores (and threads) on AMD CPUs with 8 cores or more.

I'm calling it "issue" due to the fact that the devs mentioned that they worked with AMD to fix it on a previous patch, although I'm still seeing that the game is not using all my cores (and threads) while playing, which in turn causes my framerate to drop to about 40 FPS while driving in parts where there are lots of cars.

I have a Ryzen 7 5800X, 16 GB or ram (3600 MHz) and an RTX 3080. I've tested the game with all settings, and this issue always occurs.

What do you guys think, and what's been your experience like? I've seen videos of the game running on Intel CPUs and this "issue" does not occur, as it properly uses all cores (and threads) there.

I've added screenshots to demonstrate what I'm talking about. Additionally, I would like to mention that this is most noticeable when playing with ray tracing due to the fact that RT has a heavy impact on CPU usage. Although I normally play without RT and DLSS (due to how blurry it looks), I can still see CPU related framerate drops.

Let me know what you think!
 

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Last edited:
A little bit late but I haven't noticed your thread earlier. Anyway, CDPR addressed the SMT issue together with AMD but they only use all logical cores on AMD CPUs with six cores or less. Thus, Cyberpunk 2077 will only use all physical cores on your CPU, because according to AMD this should result in the best performance for the player.

Also note that using more cores does not mean the game wouldn't be suffering from a CPU bottleneck from time to time, since the load is not spread evenly across all cores.

However, you can still test this with Cyber Engine Tweaks which allows the game to use all logical cores. If you do experience a performance increase, please share it here and also report it as a bug.
 
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