Macintosh Performa 631CD
 | |
| Performa 630, which the 631CD resembles externally (Hellis, Italian Wikipedia, CC BY-SA 3.0) | |
| Specifications | |
|---|---|
| Manufacturer | Apple Computer, Inc. |
| Type | Desktop personal computer |
| Released | 17 July 1995 |
| Intro price | US$1,600 |
| CPU | Motorola 68LC040 at 33 MHz, no FPU |
| Memory | 8 MB (4 MB on the logic board); two 72-pin SIMM slots (80 ns), the second for 1, 4 or 16 MB SIMMs only; 52 MB maximum |
| Storage | 500 MB internal IDE hard drive |
| Display | — |
| Sound | 8-bit mono input; 8-bit stereo output (16-bit in CD mode) |
| Graphics | 1 MB DRAM frame buffer, not expandable; DB-15 port |
| ROM | 1 MB |
| Media | 1.4 MB Apple SuperDrive (manual insert); double-speed CD-ROM drive |
| Ports / interface | One ADB, two RS-232/RS-422 serial (mini DIN-8), SCSI (DB-25), DB-15 video, sound in, sound out front and rear |
| Expansion | 114-pin LC processor-direct slot, 112-pin communications slot, 60-pin video-in slot, 10-pin TV tuner connector |
| Power | 100-240 V AC, 50-60 Hz, 45 W maximum |
| Dimensions | 4.3 × 16.5 × 12.6 in (10.95 × 41.95 × 32 cm) |
| Weight | 19 lb (8.6 kg) |
| OS / Firmware | System 7.5.1 to Mac OS 8.1 |
| Model no. | M3076 (Gestalt ID 98) |
The Macintosh Performa 631CD is a model in Apple's Performa 630 series with a 33 MHz 68LC040, introduced on 17 July 1995, a year after the rest of the series. Apple's specification sheet gives it 4 MB of memory on the logic board and two SIMM slots, 8 MB as shipped, 52 MB maximum, a 500 MB IDE hard drive, a double-speed CD-ROM drive and System 7.5.1.[1] EveryMac describes it as externally identical to the Performa 630CD but with two RAM slots and a 15-inch Apple colour monitor, and lists it at US$1,600 (order number M4148LL/A).[2]
Apple's Macintosh Performa 630 Series Service Source names the 631CD on its title page but gives no configuration for it; its specifications, symptom charts and procedures cover the whole series.[3] The Macintosh Performa 630 page has the series configuration table, the full specification and a selection of the symptom charts.
Specifications
[edit | edit source]| Item | Specification |
|---|---|
| Processor | Motorola 68LC040 at 33 MHz, no FPU[1][3] |
| RAM | 4 MB on the logic board; two 72-pin SIMM slots, 80 ns; the second slot takes only 1, 4 or 16 MB SIMMs; 52 MB maximum[1] |
| Video | 1 MB DRAM frame buffer, not expandable; up to 16 bits per pixel at 640 × 480, 8 bits at 800 × 600 and 832 × 624[1][3] |
| Drives | 1.4 MB SuperDrive, manual insert; 500 MB IDE hard drive; double-speed CD-ROM drive. Internal SCSI hard drives are not supported[1][3] |
| Electrical | 100-240 V AC, 50-60 Hz; 45 W maximum[1] |
Memory
[edit | edit source]Apple made two versions of the 630-series logic board: part 661-0158 with one SIMM slot (36 MB maximum) and part 661-1114 with two, one of them for single-sided SIMMs only (52 MB maximum).[3] The 631CD is a two-slot machine.[1] The second slot takes only 1, 4 or 16 MB SIMMs, so the 52 MB maximum is 4 MB on the board, a 32 MB SIMM in the first slot and a 16 MB SIMM in the second.[1][2] Apple specifies 80 ns SIMMs.[1]
Battery
[edit | edit source]Apple's specification sheet gives the battery as 4.5 V alkaline.[1] The Service Source gives no test voltage; its symptom charts print "Unplug 5.4 battery" for the 20-second battery-unplug step, a misprint for 4.5.[3] Neutralise alkaline leakage with a weak acid such as vinegar; see Battery Explosion, Capacitor or Corrosion Damage.
Maintenance and repair
[edit | edit source]The Performa 631CD has the LC 630's case and logic board family, and the LC 630 guides apply: Macintosh LC 630 General Maintenance, Macintosh LC 630 Troubleshooting and Macintosh LC 630 Capacitor Replacement Guide.
Documentation
[edit | edit source]- Macintosh Performa 630 Series Service Source: Apple's service manual for the Performa 630 series.[3]
Related pages
[edit | edit source]- Macintosh Performa 630 and the rest of the Performa 630 series
- Macintosh Performa 630CD
- Macintosh LC 630
References
[edit | edit source]- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 Macintosh Performa 631CD: Technical Specifications, Apple—link(accessed 2026-09-30) 68LC040 at 33 MHz, no FPU; data path 32-bit, 33 MHz; slots LC, comm, TV, video in; one ADB; DB-15 video; 45 W maximum, 100-240 V, 50-60 Hz; battery type 4.5 V alkaline; 4 MB on the logic board, two 72-pin SIMM slots, 8-52 MB, 80 ns; "Second SIMM slot can accept only 1, 4, or 16MB SIMMs"; 1 MB video DRAM; introduced 7/17/1995; Gestalt ID 98; original system software 7.5.1; 1 MB ROM; 500 MB IDE; 2x CD-ROM.
- ↑ 2.0 2.1 Apple Macintosh Performa 631CD Specs, EveryMac—link(accessed 2026-09-30) 33 MHz 68LC040; 8 MB, 52 MB maximum with one 32 MB SIMM, one 16 MB SIMM and the 4 MB on board; 500 MB IDE; 2X CD-ROM; externally identical to the 630CD but with two RAM slots and a 15-inch Apple colour monitor; order number M4148LL/A; model M3076; Gestalt ID 98; US$1,600; supported system software 7.5.1 and 7.5.3 to 8.1.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Apple Computer, Macintosh Performa 630 Series Service Source (1995), File:Performa 630 series.pdf; see Macintosh Performa 630 Series Service Source. PDF page numbers: title p. 1 (lists the 631CD); Product Configuration pp. 7-12 (no 631CD entry); Processor p. 18; Memory pp. 19-20; Disk Storage p. 21; Sound and Video p. 26; Symptom Charts pp. 31-46 (battery step pp. 36, 43); Logic Board take-apart p. 70 (661-0158 one slot, 661-1114 two slots).