Apple Power Macintosh G4 400 (PCI) Specs
Identifiers: Power Mac G4 - PCI - M7631LL/A - PowerMac1,2 - M5183 - 1832
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The Apple Power Macintosh G4/400 (PCI Graphics), based on the Yikes! architecture, features a 400 MHz PowerPC 7400 (G4) processor with the AltiVec "Velocity Engine" vector processing unit and 1 MB of backside cache. It shipped configured with 64 MB of RAM, a 10 GB Ultra ATA/33 hard drive, a 32X CD-ROM drive, and an ATI Rage 128 graphics card with 16 MB of SDRAM.
On October 13, 1999, a mere two weeks after introduction -- due to Motorola's inability to provide sufficient numbers of PowerPC 7400 (G4) processors -- Apple quickly, and infamously, "reconfigured" or "speed dumped" this model -- replacing it with the Power Macintosh G4/350 (PCI Graphics), and introducing the Power Macintosh G4/400 (AGP Graphics) and a revised configuration of the Power Macintosh G4/450 (AGP Graphics).
The Power Macintosh G4/400 (PCI Graphics) uses a case design effectively the same as that introduced with the Power Macintosh G3 (Blue & White) -- complete with a fold down door on the side that makes upgrading very easy -- but is clad in a more conservative "graphite" and white color scheme. Custom configurations also were available.
Also see:
- What are the differences between the original PCI and AGP-based Power Mac G4 lines? Why were there so many configurations of these models?
- How can you tell if a particular Power Mac G4 model is PCI or AGP-based?
Despite the age of this system, site sponsor Other World Computing has RAM, hard drives, SSDs, and other upgrades available for this specific Mac while supplies last.
- Tech Specs
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Click on the category for related details. The most commonly needed info is "open" by default, but all info is important.
| Introduction Date: |
August 31, 1999 |
Discontinued Date: |
October 13, 1999* |
| Details: |
The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" generally refers to the date a model either was replaced by a subsequent system or production otherwise ended.
*The lifespan of this model was cut short by Motorola's inability to provide sufficient numbers of PowerPC 7400 (G4) processors, causing Apple to quickly, and infamously, "reconfigure" or "speed dump" this model -- replacing it with the Power Macintosh G4/350 (PCI Graphics), and introducing the Power Macintosh G4/400 (AGP Graphics) and a revised configuration of the Power Macintosh G4/450 (AGP Graphics).
Also see: All Macs introduced in 1999. |
| Processors: |
1 |
Geekbench 2: |
247 |
| Details: |
This model only is compatible with the 32-bit Geekbench 2 benchmark. These numbers reflect an average of user provided 32-bit and 64-bit results as submitted to the Geekbench website. Higher numbers are better.
You also might be interested in reviewing all 32-bit Geekbench 2 user submissions for Macs with the PowerMac1,2 Model Identifier, which may include multiple models.
To dynamically compare Geekbench results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison. |
| Processor Speed: |
400 MHz |
Processor Type: |
PowerPC 7400 (G4) |
| Details: |
The PowerPC G4 includes the AltiVec "Velocity Engine" vector processor. |
| Processor Upgrade: |
ZIF Socket |
FPU: |
Integrated |
| Details: |
The Power Macintosh G4 (PCI Graphics) models have the processor mounted on a ZIF socket. |
| System Bus Speed: |
100 MHz |
Cache Bus Speed: |
200 MHz |
| Details: |
This system has a 200 MHz backside bus and 1 MB of level 2 cache. |
| ROM/Firmware Type: |
Open Firmware |
ROM/Firmware Size: |
1 MB |
| Details: |
Boot ROM and around 1 MB, other instructions are loaded into RAM (NewWorld). |
| L1 Cache: |
64k |
L2/L3 Cache: |
1 MB (backside) |
| Details: |
The 1 MB of backside cache has a 200 MHz bus. |
| RAM Type: |
PC100 SDRAM |
Min. RAM Speed: |
100 MHz |
| Details: |
Officially supports 100 MHz PC100 SDRAM (3.3v, unbuffered, 64-bit-wide, 168-pin), but PC133 SDRAM is backwards compatible and may be used as well. |
| Standard RAM: |
64 MB |
Maximum RAM: |
1 GB |
| Motherboard RAM: |
None |
RAM Slots: |
4 |
| Details: |
There is no performance advantage to installing memory modules in pairs. |
| Video Card: |
Rage 128 |
VRAM Type: |
SDRAM |
| Details: |
The ATI Rage 128 graphics card with 16 MB of SDRAM occupies a 66 MHz PCI slot. |
| Standard VRAM: |
16 MB |
Maximum VRAM: |
16 MB |
| Display Support: |
Single Display |
Resolution Support: |
1600x1200 |
| Details: |
Apple advertised that this system can support "up to 1600 by 1200 pixel resolution at 32 bits per pixel (millions of colors) and up to 85-Hz refresh rate." |
| 2nd Display Support: |
None |
2nd Max. Resolution: |
N/A |
| Standard Storage: |
10 GB HDD |
Std. Storage Speed: |
5400 RPM |
| Storage Dimensions: |
3.5" (25.4 mm) |
Storage Interface: |
Ultra ATA/33 (ATA-4) |
| Details: |
Can officially support two 3.5" Ultra ATA/33 hard drives or SSDs on the original bus (more drives can be supported with a third-party controller PCI card) -- drives larger than 128 GB are not natively supported. Ultra ATA/100 hard drives are backwards compatible with the Ultra ATA/33 standard. |
| Standard Optical: |
32X CD-ROM |
Standard Disk: |
None* |
| Details: |
The 32X CD-ROM drive uses a EIDE (ATA-3) bus. Optional 5X DVD-ROM or DVD-RAM drives were available build-to-order.
*By default, this model shipped without a disk drive, but it could be configured with an internal Zip 100 drive as a build-to-order option. |
| Standard Modem: |
56k |
Standard Ethernet: |
10/100Base-T |
| Details: |
Internal modem and 10/100Base-T Ethernet standard. |
| Standard AirPort: |
None |
Standard Bluetooth: |
None |
| USB Ports: |
2 (1.1) |
Firewire Ports: |
2 (400) |
| Details: |
USB 1.1 ports share a single channel. |
| Expansion Slots: |
3 PCI* |
Expansion Bays: |
5 3.5" |
| Details: |
*In the default configuration, this model has three open 33 MHz PCI slots and a 66 MHz PCI slot occupied by the graphics card.
It has five 3.5" drive bays (four are internal and intended for hard drives, and one is external and intended for a Zip 100 drive). By default, with a single drive installed, three internal 3.5" bays are free as is the external 3.5" bay. The system also has an external 5.25" drive bay occupied by the optical drive. |
| Incl. Keyboard: |
Apple USB Keyboard |
Incl. Input: |
Apple USB Mouse |
| Case Type: |
Tower |
Form Factor: |
Power Mac G4 (Graphite) |
| Apple Order No: |
M7631LL/A |
Apple Subfamily: |
Power Mac G4 - PCI |
| Details: |
The Apple order number should be unique to this system. |
| Apple Model No: |
M5183 (EMC 1832) |
Model ID: |
PowerMac1,2 |
| Details: |
Please note that these identifiers refer to more than one model.
Also see: All Macs with the M5183 Model Number, the 1832 EMC Number, and the PowerMac1,2 Model Identifier.
For more about these identifiers and how to locate them on each Mac, please refer to EveryMac.com's Mac Identification section. |
| Battery Type: |
3.6V Lithium |
Battery Life: |
N/A |
| Pre-Installed MacOS: |
8.6 |
Maximum MacOS: |
X 10.4.11 |
| Details: |
This system cannot run versions of MacOS X more recent than 10.4.11. |
| MacOS 9 Support: |
Boot/Classic Mode |
Windows Support: |
Emulation Only |
| Details: |
This Power Macintosh G4 model is capable of booting Mac OS 9 and using Mac OS 9 applications within the Mac OS X "Classic" environment. |
| Dimensions: |
17.0 x 8.9 x 18.4 |
Avg. Weight: |
30.0 lbs. (13.6 kg) |
| Details: |
In inches - height by width by depth, (43.2 cm, 22.6 cm, 46.7 cm). |
| Original Price (US): |
US$1599 |
Est. Current Retail: |
N/A |
| Details: |
Please note that on average the estimated current retail pricing of used systems is updated twice a year (please refer to the date on the bottom of the page for the date last updated).
Photo Credit: Apple Computer. |
Ten of the most popular Q&As about the Power Macintosh G4 models follow.
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1 (VGA) 
None 
None 
None 
None
None
2 (1.1)
2 (400)
1 (RJ-45)
None
None
None
1
1
None
1
N/A
1
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