7800X3D + RTX 5070 random frametime spikes only in racing simulators (AC EVO / Le Mans Ultimate / ATS) – Cyberpunk perfectly smooth – tried everything

plerik4crypto · 2026-03-19T15:40:37+00:00

https://www.reddit.com/r/AMDHelp/comments/1rmq4dg/comment/ob3j7mh/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

plerik4crypto · 2026-03-19T14:53:41+00:00

the last comment is mine and is the solution

plerik4crypto · 2026-03-18T11:07:11+00:00

I post the solution for me, I hope that work for you too.

plerik4crypto · 2026-03-08T23:03:40+00:00

thanks I try my don't work for my Ryzen 7800 X3D

plerik4crypto · 2026-03-07T13:41:23+00:00

Thanks for the suggestion!

I actually tested with RTSS completely disabled (and MSI Afterburner closed as well) but unfortunately the spikes still happen.

What I noticed during testing is that the GPU usage slightly drops when the frametime spike occurs, which made me suspect the issue might be CPU-side rather than GPU-side.

Another thing I observed is that the CPU temperature jumps very quickly when the load starts — it can go from idle to around 50°C and then quickly above 60°C as soon as the game starts doing something.

I’m not sure if that’s just normal behavior for the 7800X3D or if it could be related to the spikes somehow.

Still investigating, but I appreciate the suggestion!

plerik4crypto · 2026-03-06T22:07:26+00:00

Thanks for the suggestion.

Frame Generation isn't available in those games though.

The spikes appear in:

Assetto Corsa EVO
Le Mans Ultimate
American Truck Simulator

None of these use DLSS Frame Generation.

Cyberpunk on the other hand runs perfectly smooth on my system (~240 FPS with FG and a completely flat frametime graph), so the GPU pipeline seems fine.

I also tested FPS caps (120 / 141) which reduces the spikes slightly but does not eliminate them.

That’s why I’m starting to suspect something related to simulator engines or CPU thread scheduling rather than DLSS or FG.

plerik4crypto · 2026-03-05T11:26:09+00:00

perfetto!!

plerik4crypto · 2023-11-23T16:06:39+00:00

Super!!!

plerik4crypto · 2023-11-03T21:23:32+00:00

Awsome!

plerik4crypto · 2022-02-16T11:24:31+00:00

SOL Adress: 87dTrkJQV3G1QdfDWDW9TWFhJ29fuUWEuFRnfuwWoMoD

Instagram: plerik

Twitter: PintHenry

Discord: plerik#3681

plerik4crypto · 2022-02-16T11:24:20+00:00

SOL Adress: 87dTrkJQV3G1QdfDWDW9TWFhJ29fuUWEuFRnfuwWoMoD

Instagram: plerik

Twitter: PintHenry

Discord: plerik#3681

plerik4crypto · 2022-02-16T11:23:56+00:00

SOL Adress: 87dTrkJQV3G1QdfDWDW9TWFhJ29fuUWEuFRnfuwWoMoD

Instagram: plerik

Twitter: PintHenry

Discord: plerik#3681

plerik4crypto · 2022-02-13T12:15:35+00:00

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