As i posted above i personally noticed and enjoy the difference in the games i play which are at 4k over the 3080 ... its up to you if you think the extra frames are worth it or not but as i own a 4k 144hz monitor and a 77" Lg cx which is 4k 120/hz i wanted as many as i could get
A benchmark i ran in multiplayer on modern warfare , these are at 4k with ultra setting including RT
3080FE :
ModernWarfare.exe benchmark completed, 64426 frames rendered in 555.594 s
Average framerate : 115.9 FPS
Minimum framerate : 69.1 FPS
Maximum framerate : 149.2 FPS
1% low framerate : 75.8 FPS
0.1% low framerate : 12.3 FPS
3090 Strix oc:
ModernWarfare.exe benchmark completed, 68380 frames rendered in 497.047 s
Average framerate : 137.5 FPS
Minimum framerate : 86.3 FPS
Maximum framerate : 183.7 FPS
1% low framerate : 89.6 FPS
0.1% low framerate : 6.3 FPS