I got bored and decided to tinker with my PC. My CPU is already at it's OC limit (10700K @ 4.9ghz all core) with my cooler so I decided to focus on my videocard (evga rtx 3090 ftw3 ultra).
First I ran Unigine Heaven:
stock clocks= 77c, 77.5 fps
core undervolted to 900mv= 70c, 77.1 fps
core undervolted and oc mem +500 = 72c, 78.2 fps
core undervolted and oc mem +750 (3090Ti mem speed) = 72c, 78.7 fps
Then I decided to run my other usual benchmarks:
Stock:
3dmark firestrike = 33,197
3dmark timespy = 18,396
ff14 endwalker benchmark = 17,193
ff15 benchmark = 8,975
supersposition 1080p extreme = 12,856 @ 78c
Borderlands 3 = 86 fps
Undervolted gpu and overclocked mem:
3dmark firestrike = 33,201
3dmark timespy = 18,532
ff14 endwalker benchmark = 17,316
ff15 benchmark = 9,225
supersposition 1080p extreme = 12,259 @ 74c
Borderlands 3 = 88 fps
The core is running a few degrees cooler and the mem temps are the same (88c under full load), but fans are a little quieter than stock due to lower gpu temps. The only benchmark where the score didn't go up was Superposition (went down a little) but I guess it relies on the core more than memory.
Edit: Updated to add Borderlands 3 built-in benchmark @ 4K max settings as well