Apple Macintosh Quadra 900 Specs- M4200

The Macintosh Quadra 900 has been described as “Huge”, “monstrous” and “just plain big”. Released alongside the Quadra 700, it included a 303W power supply that could support two 25-watt NuBus cards and three of the more typical 15-watt cards. Designed to be used as a server, the case itself was adopted in the design of the Quadra 950 a year later.


The Apple Macintosh Quadra 900 incorporated  32 bit Motorola 68040 processor running at 25mHz and supported by 8k of level 1 cache.


The system was supplied with a base 4 MB of RAM. However, it’s 16 memory slots could each accomodate 80ns 30 pin SIMMs up to 16MB in size, yielding a total of 256MB RAM.


The Quadra 900 shipped with either a 160 MB (Order No: M4230LL/A) or 400 MB SCSI hard drive. It could be significantly upgraded using larger capacity drives.  The first Macintosh to ever ship as a Tower Case, it lacked an optical drive.

Video & Graphics:

It’s four VRAM SIMM slots could each accomodate 512k SIMMs, offering a total 2MB Video support.  With it’s base 1MB VRAM, the system offered a resolution of  512×384 (24-bit) and 640×480, 832×624 and 1152×870 (8-bit color depth). The addition of a further 1MB VRAM improved color depth dramatically, resulting in 24 bits at up to  832×624 and 8 bits at a maximum resolution of 1152×870.

Ports & Connectivity:

The Quadra 900 offered a sound input port, something that was lacking on the Quadra 700.  It also offered a stereo 8 bit output port, 2 x ADB ports, AAUI-15 ethernet, 2 x Serial ports, an ADB port and DB-15 video output.  As was standard on all Macintosh systems of the time, a DB-25 port offered connectivity for external SCSI devices.

Introduction Date: October 21, 1991 Discontinued Date: May 18, 1992
Processor Speed: 25 MHz Processor Type: 68040
Processor Upgrade: Third-Party FPU: Integrated
System Bus Speed: 25 MHz Cache Bus Speed: N/A
ROM/Firmware Type: Macintosh ROM ROM/Firmware Size: 1 MB
L1 Cache: 8k L2 Cache: N/A
RAM Type: 30-pin SIMM Min. RAM Speed: 80 ns
Details: N/A
Standard RAM: 4 MB Maximum RAM: 256 MB
Motherboard RAM: None RAM Slots: 16
Video Card: Dedicated VRAM Type: VRAM SIMM
Standard VRAM: 1 MB Maximum VRAM: 2 MB
Display Support: Single Display Resolution Support: 512×384-1152×870
Standard Hard Drive: 160 MB, 400 MB Int. HD Interface: SCSI
Standard Optical: None Standard Disk: 1.44 MB (Auto)
Standard Modem: None Standard Ethernet: AAUI-15
Expansion Slots: 1 040 PDS, 5 NuBus* Expansion Bays: 2 (5.25″)**
Case Type: Tower Form Factor: Mac Quadra 900
Apple Order No: M4210LL/A Apple Subfamily: Macintosh Quadra 900
Apple Model No: M4200 Gestalt ID: 20
Battery Type: 3.6V Lithium Battery Life: N/A
Original Mac OS: 7.0.1 Supported Mac OS: 7.0.1-7.5.1, 7.5.3-8.1
Dimensions: 18.6 x 8.9 x 20.6 Avg. Weight: 36.8 lbs (11.5 kg)