Cyberpunk 2077 Runs Worse on Select AMD Ryzen CPUs Due to Threading Issue, But Here’s a Quick Fix

[Tsing]

Image: CD PROJEKT RED



PC gamers who are playing Cyberpunk 2077 on AMD rigs have discovered that the game fails to take full potential of higher-core Ryzen processors due to some sort of bug or oversight related to simultaneous multithreading (SMT). Instead of taking advantage of all logical cores, the game only sees physical cores, which means that half of the CPU’s threads go to waste (e.g., Cyberpunk 2077 only utilizes six of the Ryzen 5 5600X’s 12 total threads).



The discrepancy and idle behavior can be confirmed via Task Manager (Performance > CPU > Logical Processors Graph), but luckily, a user by the name of UnhingedDoork has uncovered a workaround that improves thread usage in Cyberpunk 2077...

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[Grimlakin]

I don't think I want to hex edit my game to get this to work right... seems disengenuious.

 

[ThreeDee]

I'm running the GOG.com version and that hex value is not there in the .exe file.

I run 1080p on ultra/high and game seems to run pretty good on my 5700xt and 3800xt but I thought I'd give this a go anyways ..

.. and ... there's a thread over at [H] about using VPN and switching to Russia or Ukraine servers to get the game for $26.95 or $30 instead of US $60.

 

[Grimlakin]

Because I'd trust software from Russia or Ukraine. I mean if someone can conform.tjey are the same code ok but I'd be cautious.

 

[Uvilla]

No worries, the game will be fully completed by October 2021.

 

[Riccochet]

I did the hex edit fix. Saw a bit of overall improvement. Not so much increased FPS, but less lag spikes.

 

[Peter_Brosdahl]

I did the hex edit fix. Saw a bit of overall improvement. Not so much increased FPS, but less lag spikes.

I read similar posts over at DSOG about this on the weekend.

 

[Peter_Brosdahl]

It seems likely that CDPR will eventually include this, or something similar, in a future patch. I'd be surprised it they didn't. It's just a part of post-launch optimizations.

 

[Captindecisive]

The string is there in the GoG version. As with other reports, went from a CPU usage on a 5800x of ~45% to 85% after the hex edit and much smoother experience (much better 1% and 0.1% frame times)

 

[Denpepe]

It seems likely that CDPR will eventually include this, or something similar, in a future patch. I'd be surprised it they didn't. It's just a part of post-launch optimizations.

Seems a strange error given that the console versions run on AMD hardware, or is that the reason they run so bad?

 

[Peter_Brosdahl]

Seems a strange error given that the console versions run on AMD hardware, or is that the reason they run so bad?

Couldn't tell ya, custom SoC's and all. I think for them, it has more to do with limited hardware resources but it's possible something like this could help but I doubt it's the cure.

 

[Brian_B]

I'd be willing to bet it's more an issue with the compiler they used on the PC, as most of them default to Intel optimizations. I would guess the issue would not be present on the consoles, since they would use a different optimizing compiler there that would, presumably, properly utilize multithreading.

 

[Armenius]

Seems a strange error given that the console versions run on AMD hardware, or is that the reason they run so bad?

The Jaguar in the Gen 8 consoles doesn't have SMT.

 

[Bloax]

I don't think I want to hex edit my game to get this to work right... seems disengenuious.

There's this https://www.nexusmods.com/cyberpunk2077/mods/107

not that I can download it because I don't have an account there :^)

 

[hubaduba]

CDPR shipped old code from AMD that checks for Bulldozer CPUs. If it does not detect Bulldozer, it turns off SMT. Should be an easy fix in the next patch.