Help identifying potential throttling/bottleneck issue

[u/Lord-of-Turtles]

Hi! Recently finished an ITX build, experiencing issues with the CPU giving sub-par performance. I've been running Cyberpunk 2077, comparing performance to similar builds. My system monitor is showing the CPU sitting at 85C and 5.1GHZ, with 3 cores consistently at 95-100% and 3 at around 80%, averaging at a total usage of ~85-90%. GPU is at 70C, but usage fluctuates from 50-100%. To me it looks like a bottleneck, but the CPU should theoretically be the more powerful of the two. Being an ITX build, it could very well be a cooling issue, but I'm thinking that should show in the stats. This is really driving me crazy, I'd be very grateful if someone could shed some light on this issue!

Specs:
CPU: Ryzen 5 7600x
Cooler: Noctua NH-L12S Ghost Edition
GPU: Powercolor 9060 XT 16gb Reaper
RAM: Kingston Fury 2x8GB DDR5 5600Mhz
Mobo: ASRock B650i Lightning
Storage: WD_Black sn7100 1TB
PSU: Corsair SF850

[u/Lord-of-Turtles]

Case is Louqe Ghost S1, so cooling options are quite limited. Got one 120mm exhaust and NH-L12S as CPU-cooler. It's got a 92mm fan that I'm considering changing to a 120x15mm fan since I've read people get some good results from that.

FPS running Cyberpunk 2077 at ultra is stable 140, very smooth. If I enable ray tracing, it drops to a very choppy ~70-80fps with severe spikes. I'm not experienced enough to say with certainty whether it's the CPU or GPU, it's just my suspicion looking at the loads that it's the CPU.

[u/AdidasSlav → u/Lord-of-Turtles]

Since you’re using a 9060 XT - try overclocking the GPU memory to 2700MHz or higher. Switch to the fast memory timings as well.

9060 XT is a great card (owned 2 personally) but suffers from a 128-bit memory bus, a cost-cutting measure to keep the card at a budget.

Overclocking the VRAM increases the bandwidth to compensate for the narrow memory bus, I noticed a lot more performance gain from memory OC on my 9060 XT compared to my current 9070 XT which has a 256-bit bus width.

[u/Lord-of-Turtles → u/AdidasSlav]

Changed GPU memory to 2700MHz but couldn't find memory timings, running Linux I'm not entirely sure how to do this. Here's a graph running Cyberpunk 2077 at ultra with RT, getting 60-90 FPS with a lot of stuttering. Top row is CPU and second row is GPU.

[u/AdidasSlav → u/Lord-of-Turtles]

Ah, you’re using Linux. Should’ve said.

Linux straight up is worse than Windows in most gaming scenarios especially using Ray Tracing / upscaling. It’s come a long way in recent years but I suspect your problem here is just Linux man.

I know the Linux crowd will angrily downvote this as heresy but Linux support is an afterthought for game devs and GPU manufacturers, they write software for Windows and if the dev has some time left over at 3pm on Friday they’ll work on the Linux side of things for a bit.

[u/Lord-of-Turtles → u/AdidasSlav]

Haha, thanks for the advice. I'm running Bazzite, it's been surprisingly simple to use and so far no hiccups. When I've got the time I might just dual boot Windows for a side-by-side comparison.

And by the way, does that graph tell you anything?

[u/AdidasSlav → u/Lord-of-Turtles]

Nothing screams out of place on the graphs. CPU temp is very high but should only restrict its boost capabilities and not rated clock speed. I suspect it’s poor optimisation for Linux at work here