Correct me if I'm wrong, but I think all the replies are misunderstanding you as saying 'who has so much RAM', when you're actually referring to 30 being a bizarre total number of GB of RAM to have.

I can't even think of a combo of (certainly-mismatched) sticks of RAM that'd get you to 30 even. 8-8-8-6?

I suspect it may be bios level allocation of system ram to an igpu? I think that could affect how the system reports ram??

RAM used to grow on trees next to the money bushes. We used to grab a few bucks and smoke under the shade before picking a few rams on our way back home.

The minimum you can get per stick is 16GB for DDR5. You usually want 2 sticks for dual-channel memory

30gb RAM, 2.3TB hard drive, 7-core Intel Q-447, and an NVIDIA BTX 8675309 graphics card.

Usually just from trying to max out what they have without replacing sticks. I had 80gb for a while when I added 2 32GB sticks to my 8GBx2 setup. I eventually removed the two 8GB sticks due to stability issues.