Specifications

Memory Portables - 15
PowerBook
520/540
The PowerBook 520, 520c,
540, and 540c have 4 MB of
RAM soldered on-board and
one expansion slot each. These
computers are expandable to
36 MB of RAM.
Note: There is 512K of VRAM available for
internal and external video for a total of 1
MB. It is not expandable.
Note: Apple does not supply 32 MB PSRAM
Expansion Cards; however, they are
available from third-party vendors.
Memory Information
RAM Speed 70 ns
Soldered RAM 4 MB
Supported Sizes in MB 4, 8, 12, 20,
32
Maximum RAM 36 MB
Virtual Memory 1 GB
Soldered VRAM 512K (see Note)
Number of VRAM Slots None
DRAM Configurations
4 MB The PowerBook 520/540
daughterboard has 4 MB of
soldered DRAM.
8 MB Install a 4 MB Static RAM Card
(PSRAM Card).
12 MB Install an 8 MB Static RAM Card
(PSRAM Card).
36 MB Install a 32 MB Static RAM
Card (PSRAM Card).