Apple Macintosh PowerBook 520c vs Apple Macintosh PowerBook 540

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Macintosh PowerBook 520c compared with Macintosh PowerBook 540

	AppleMacintosh PowerBook 520c	AppleMacintosh PowerBook 540
Overview
Released
Released	May 1994	May 1994
Display
Screen size
Screen size	9.5″	9.5″
Resolution
Resolution	640 × 480	640 × 480
Touchscreen
Touchscreen	No	No
Display type
Display type	9.5-inch backlit dual-scan passive-matrix colour LCD with 256 colours	9.5-inch active-matrix greyscale LCD with 64 grey levels at 640 × 480
Performance
Processor
Processor	Motorola 68LC040 50 MHz (PowerBook 520)	Motorola 68LC040 66 MHz (PowerBook 540c)
CPU cores
CPU cores	1	1
Memory
Memory	12 MB (better)	4 MB
Storage
Storage	240 MB to 320 MB (better)	240 MB
CPU
CPU	Motorola 68LC040 with 50 MHz internal processor speed and 25 MHz bus interface; no floating-point unit	Motorola 68LC040 with 66 MHz internal processor speed and 33 MHz bus interface; 8 KB L1 cache and no floating-point unit
Memory type
Memory type	4 MB on the logic board, expandable to 36 MB; Apple's Japanese bundled configurations contain 12 MB	4 MB on the logic board, expandable to 36 MB through one memory expansion slot
Storage type
Storage type	Internal SCSI hard drive and 1.4 MB Apple SuperDrive floppy drive; Japanese configurations pair 12 MB RAM with 240 or 320 MB storage. English support also lists a 160 MB drive	240 MB internal SCSI hard drive and Apple SuperDrive floppy drive
Battery and size
Battery life (maker's claim)
Battery life (maker's claim)	Up to 3 hours	Up to 3 hours
Weight
Weight	2.9 kg (better)	3.2 kg
Thickness
Thickness	57 mm (better)	58 mm
Width × depth
Width × depth	292 × 245 mm	292 × 246 mm
Battery life detail
Battery life detail	Nickel-metal hydride intelligent battery; Japanese specification claims three hours per battery, with one supplied and room for two. April 1995 Apple Facts instead gives 2–4 hours on one battery and 4–7 hours on two; 2.9 kg includes one battery	Two high-capacity Type II nickel-metal hydride batteries supplied; Apple claims 1.5–3 hours on one battery or 3–6 hours on two
Connections
Operating system
Operating system	macOS	macOS
Port detail
Port detail	ADB, RS-422 serial/LocalTalk, AAUI Ethernet, HDI-30 SCSI, stereo audio input/output, external video and power input; optional internal modem and PCMCIA module supporting two Type II or one Type III card	ADB, serial/LocalTalk, AAUI Ethernet, HDI-30 SCSI, external video, stereo sound input/output and power input; optional internal modem and processor-direct PCMCIA expansion module
External displays
External displays	Mirroring and extended desktop through an optional video adapter cable	Video output supports compatible external Apple displays through an adapter; built-in greyscale display can be upgraded to active-matrix colour with Apple's optional upgrade
Trackpad
Trackpad	Built-in solid-state trackpad	Built-in solid-state trackpad
Speakers
Speakers	Two stereo speakers and a built-in microphone	Two built-in speakers and microphone with 16-bit stereo sound
In the box
In the box	Japanese 12 MB/240 MB bundle includes one intelligent battery, power adapter, KanjiTalk 7.5 media and PowerBook Mobility Bundle; the 12 MB/320 MB bundle adds Express Modem II	Notebook, two batteries and power adapter; preinstalled PowerBook Mobility Bundle. Dimensions and metric weight come from Apple's October 1994 Apple Facts