This model isn't built for 1080p resolution.
This model isn't built for 1080p resolution.
The CPU usage on the Threadripper 2990WX is around 2% during gaming, making it a solid choice for gaming without any bottlenecks. Most of the games run on a single core, so the usage stays under 50%. However, it would gain a lot from the powerful single-core improvements found in the i7 8700K.
I faced a similar issue with my 3770 + 980 Ti setup. None of the discussions reached the maximum limit, yet my GPU consistently stayed below 80% during GTA:5. You might want to remove the overclocking on your CPU and see if performance improves. It could be due to increased draw distance requiring more processing power.
A common guideline is to observe how your GPU handles higher resolutions and graphics settings. If it becomes a bottleneck, increasing resolution via DSR will raise its workload. Higher FPS means you're more likely to hit your CPU's limits. It doesn't matter if threads are saturated; if GPU usage jumps from below 90% at 1080p to 99% at 4K, the problem is probably on the CPU or RAM.
Turn off FastStartup in Windows 10 and restart your PC (also turn off other features like GameMode, Game DVR, Game Bar, etc.). This previously caused similar GPU usage issues while using GSync. You might also want to uninstall drivers with DDU and install new ones. I don’t play or have played most of the listed games except Witcher 3. I run at 165Hz 1440p (1080ti and 4.5GHz 4770k). Increasing my RAM from 1600MHz CL9 to 2200MHz CL9 significantly improved FPS in games like BF1 and Witcher 3, though not much in others. Still, my 4770k remains a minor bottleneck even at 1440p, but I can usually get past 100FPS. The CPU tends to lag around 130FPS in CPU-heavy titles.