Lumira Desktop 1.30 RAM Recommendations

Can anyone tell me the required / recommended total RAM for a PC running Lumira desktop? We want to setup a VP with Lumira but his PC has only 4GB of RAM. The PAM says 4GB required, but there's some debate here as to whether that means just for Lumira or total for the machine. In other words, do we need to account for 4GB for Lumira + additional for OS and other applications? Thanks.