It is truly incredible, the commonly used RAM for PC devices over the years:

'82 to '84 - 1KB to 16KB

'85 to '89 - 512KB to 640KB

'89 to '92 - 1MB to 2MB

'93 to '94 - 4MB to 8MB

'95 to '99 - 32MB to 128MB

'00 to '01 - 256MB to 512MB

'02 to '04 - 1GB to 2GB

'05 to '09 - 3GB to 4GB

'10 to today - 6GB to 48GB