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Macintosh Quadra 605

M1476 · 1993–1994 · desktop

Specifications

Cpu: Motorola 68LC040 25 MHz (no FPU, socketed)
Gpu: Onboard video, 512 KB VRAM (1 MB max via VRAM SIMM)
Ram: max: 36 MB official (4 MB onboard + 32 MB 72-pin SIMM); up to 132 MB with a 128 MB SIMM per community reports · base: 4 MB (soldered) or 8 MB
Ports: LC III PDS slot · DB-15 video (onboard) · ADB · SCSI (DB-25) · Serial ×2 (printer, modem) · Microphone in (PlainTalk) · Audio out (stereo)
Display: None built in; onboard video with 512 KB VRAM (1 MB max) drives 512×384 up to 1152×870
Storage: base: 80 MB SCSI HDD · options: 160 MB SCSI HDD · 1.4 MB SuperDrive floppy (manual inject)
Os Support: latest: Mac OS 8.1 · shipped: System 7.1

Variants

Revisions

Macintosh LC 475Same logic board and pizza-box case sold into education, 1993-96

Performa 475Retail channel version of the LC 475, 1993-95

Performa 476Performa 475 with a 230 MB hard drive

Storage

80MB HDD

160MB HDD

Upgrade paths

CPU

Full 68040 (adds FPU) drops into the socket; PowerPC 601 upgrade cards (Apple, DayStar, Sonnet Presto up to 100 MHz) · The socketed 68LC040 makes the full-040 swap the classic first mod. PPC cards occupy the 68040 socket area and block the PDS slot, and need a fat 68k/PPC System install.

EASY

RAM

36 MB official; 132 MB with a 128 MB 72-pin SIMM · Single 72-pin SIMM slot, 80 ns. Lid pops off like every pizza-box LC.

~$20-$40 for period 72-pin SIMMs

EASY

storage

Internal 3.5" SCSI drive or solid-state emulator (SCSI2SD, BlueSCSI) · Standard 50-pin SCSI swap.

EASY

display

1 MB VRAM for more colors at high resolutions · Single VRAM SIMM slot.

EASY