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SMT performance impact in games on Ryzen CPUs?

g67575

g67575

g67575

Soldato
Joined
30 Jun 2019
Posts
8,058
Does SMT improve minimum framerates in most titles?

Tried to find specific info on this for Zen 4, but none available yet.

I'm going to have an AM5 board soon + 8 core 7700X, so I'm curious about what the impact of leaving SMT enabled in games is.

I've seen some games perform badly with it enabled on previous Ryzen generations, like AC: Odyssey.

Hyperthreading on my 10700KF can significantly reduce minimum framerates, in games like TW: Warhammer III, which apparently is not optimised to use lots of threads.
 
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It looks like AMD drew the short straw when it comes to multithreaded optimisation, at least in games. In Cyberpunk, the developers seemed to struggle with SMT optimization:

Reddit - Dive into anything

www.reddit.com www.reddit.com

In the 2nd screenshot, SMT utilization is much greater across all cores of the 5800X3D, with a significant increase in FPS and GPU utilization.
 
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