Acer AR180 F1 Series User Manual page 79

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Logical Count: This item displays the number of CPU cores installed in
your system as detected by the BIOS.
System Memory
This displays the size of memory available in the system as detected by
the BIOS.
Populated Size
Displays the size of the memory modules installed in the system as
detected by the BIOS.
Available Size
Displays the memory available for use.