5th build. After playing around with Curve Optimizer and MSI Afterburner, both CPU and GPU temps are under control, with a bit of performance improvement as well.
CPU: Running Curve Optimizer at -25 CCD0 / -20 CCD1
GPU: Tuned it to 2895 MHz @ 915 mV, seeing 2835–2850 MHz @ 905 mV in-game