Your CPU knows the RAM limit better than the manual.

You don’t need the manual — check the CPU. Most motherboards support 32GB as long as the processor does, and nearly every consumer CPU made in the last decade handles at least 32GB (often 64GB+). Just look up your CPU model on Intel Ark or AMD’s site and check the “Max Memory” spec. Or run CPU-Z on Windows and look at the Memory tab for supported capacity.

If your motherboard has two DIMM slots and supports DDR4 or DDR5, 32GB is almost always fine. The only gotcha is very old hardware (like early DDR3 boards) where 4GB sticks were rare, but even then 32GB might work with the right modules.

Unless your build is from 2010, you’re safe.