Neither DLSS nor FSR will help you with the CPU bottleneck, hm...
Sure it help, when everything is on highest settings the GPU wont send too many frames to the CPU and therefore CPU is not allways on 100%
So i aim for high GPU usage to give the CPU some breathing. I can even change the resolution and try to go for some DSR by having 4k on a WQHD Monitor.
Give the GPU some sweating time.