Do I need to manually adjust voltage and timings for a 32GB RAM upgrade?

No, not if you buy a matched kit and enable XMP (or DOCP / EXPO on AMD). Modern motherboards handle basic RAM training automatically, reading the XMP profile and setting voltage and timings for you. You only need manual adjustment if mixing sticks or pushing beyond the CPU’s rated speed. For a clean 32GB upgrade with a matched kit, just enable XMP in BIOS and you’re done.