The Power Macintosh G5 “Quad Core” (2.5), along with the Power Macintosh G5 Dual Core 2.0gHz and Power Macintosh G5 Dual Core (2.3), are the first and last Power Macintosh G5 models to use dual core PowerPC 970MP (G5) processors, which have two independent processor “cores” on a single silicon chip.
However, the quad core G5 is the first system to incorporate Apples improved liquid cooling system that was re-designed as a result of “leaks” that developed in prior systems. The liquid cooling system utilises a small pump to circulate a fluid over the heat sink and through a substantial radiator, drawing heat away from the quad core CPU. The radiator in turn is cooled by fans drawing air through them. A total of 9 computer controlled cooling fans draw air through four different thermal zones for optimum cooling of the system.
On the left, the Powemac G5 CPU cooling system. The fluid is pumped over the top of the CPU, pulling heat away from the processor and dumping it into the radiator (see below left)
The Power Macintosh G5 “Quad Core” (2.5) is powered by two “dual core” 2.5 GHz PowerPC 970MP (G5) processors with four optimized AltiVec “Velocity Engine” vector processing units (one per core), eight double-precision FPUs (two per core), 1 MB of on-chip level 2 cache on each core, and dual bidirectional 1.25 GHz frontside system buses (one for each processor). It shipped configured with 512 MB of 533 MHz PC2-4200 DDR2 SDRAM, a 250 GB (7200 RPM) Serial ATA hard drive and a 16X dual-layer “SuperDrive”.
Like all PowerPC “G5″ processors, the PowerPC 970MP “G5″ has 64-bit data paths and registers with native support for 32-bit application code. Apple also reports that each core of the 970MP has a “parallel data structure supporting up to 215 simultaneous in-flight instructions, and simultaneous issue of up to 10 out-of-order operations.” Each core likewise has a “dual-pipeline Velocity Engine for 128-bit single-instruction, multiple-data (SIMD) processing [and] advanced three-stage branch-prediction logic.”
Ports and Connectivity:
The quad core G5 shipped with an NVIDIA GeForce 6600 video card with 256 MB of GDDR SDRAM which supports a 30 inch screen via the dual link DVI port and a second display with a maximum resolution of 1920×1200 using the single-link DVI port.
Connectivity includes USB 2.0, FireWire “400″ and “800″, a single-link DVI and a dual-link DVI port, optical digital audio in/out, two independent Gigabit Ethernet ports, and support for AirPort Extreme (802.11g) and Bluetooth 2.0+EDR.
All of the “multiple core” equipped Power Macintosh G5 models have three open PCI-Express (PCIe) expansion slots. The Power Macintosh G5 “Quad Core” (2.5) uses the same easy-to-upgrade “anodized aluminum alloy” case as all other Power Macintosh G5 models with the same removable side panel for easy access to internal components. .
A build-to-order NVIDIA Quadro FX 4500 graphics card option was available with 512 MB of GDDR3 SDRAM has two dual-link DVI ports and is capable of powering two 2560×1600 displays, like the 30-inch Apple Cinema Display models.
A second Hard drive could be added to the second SATA enabled bay and the optical drive could be repalced with a third party unit. A raid card could also be added to the system.
A total of 8 memory slots are included, each capable of addressing 2GB PC2-4200u (unregistered DIMMS). Located behind the fans to the front of the CPU housing (pull tab to remove), DIMMS have to be added in pairs with one to the top bank and one in the lower banks corresponding slot.
Apple Shipped Software:
The Lineup of G5 towers each shipped with a Markedly improved and stable operating system, named Tiger. The system, Version 4 of the now famous Linux based operating system included:
Mac OS X v10.4 Tiger
Mac OS X Tiger delivers native 64-bit support, enabling you to run applications that address massive amounts of memory. It features amazing Spotlight search technology, handy Dashboard widgets and hundreds more new features. Tiger also includes all-new versions of the following system applications:
- Safari 2
- Mail 2
- Address Book 4
- iChat AV 3
- iCal 2
- Font Book 2
- DVD Player 4.5
- Preview 3
- Xcode 2
In addition, the Power Mac G5 comes with an incredible bundle of software:
- QuickBooks New User Edition
- Art Directors Toolkit
- FileMaker Pro Trial
- OmniGraffle and OmniOutliner
- Microsoft Office 2004 Test Drive
- Zinio Reader
- Apple Hardware Test
||October 19, 2005
||August 7, 2006*
||PowerPC 970MP (G5) x2
||This system has two PowerPC 970MP “G5″ processors each with twoindependent 2.5 GHz processor “cores” (four “cores” total). It also includes dual optimized AltiVec “Velocity Engine” vector processing units (one per core), four double-precision FPUs (two per core), and on chip level 2 cache on each core.Like all PowerPC “G5″ processors, the PowerPC 970MP “G5″ has 64-bit data paths and registers with native support for 32-bit application code. Apple also reports that each core of the 970MP has a “parallel data structure supporting up to 215 simultaneous in-flight instructions, [and] simultaneous issue of up to 10 out-of-order operations.” Each core likewise has a “dual-pipeline Velocity Engine for 128-bit single-instruction, multiple-data (SIMD) processing [and] advanced three-stage branch-prediction logic.”
||2 (4 Cores)
|System Bus Speed:
||1.25 GHz (2:1)
||Cache Bus Speed:
||2.5 GHz (Built-in)
||Min. RAM Speed:
||Supports 533 MHz PC2-4200 DDR2 SDRAM.
||Installed as two 256 MB modules. Memory must be installed in pairs. To upgrade the memory in this mac, see the G5 Memory upgrade Guide
||The NVIDIA GeForce 6600 with 256 MB of GDDR SDRAM occupies a 16-lane PCI Express slot.
|2nd Display Support:
||2nd Max. Resolution:
||The default graphics card can support a second display with a maximum resolution of 1920×1200 using the single-link DVI port (assuming the dual-link DVI port is being used for the primary display). The build-to-order NVIDIA Quadro FX 4500 graphics card with 512 MB of GDDR3 SDRAM has two dual-link DVI ports and is capable of powering two 2560×1600 displays, like the 30-inch Apple Cinema Display models.
|Standard Hard Drive:
||250 GB (7200 RPM)
||Int. HD Interface:
||Serial ATA (1.5 Gb/s)
||6X DL “SuperDrive”
||Apple reports that this “16X” DVD+R DL/DVD±RW/CD-RW SuperDrive “writes DVD-R discs at 16x speed, writes DVD+R DL discs at up to 6x speed, reads DVDs at up to 16x speed, writes CD-R and CD-RW discs at up to 24x speed, [and] reads CDs at up to 32x speed.” It uses an Ultra ATA/100 bus.
||2 (400), 1 (800)
||The “Multiple Core” Power Mac G5 models have four USB 2.0 ports on the system (one on the front panel and three on the back), two Firewire “400″ ports (one on the front and one on the back), and one Firewire “800″ port on the back. Apple also advertised “two USB 1.1 ports on included keyboard”.
||3 PCIe, AP/BL
||This model has “two open full-length four-lane PCI Express slots”, “one open full-length eight-lane PCI Express slot”, a 16-lane PCI Express slot that is occupied by the graphics card, as well as expansion slots for AirPort Extreme (802.11g) — antenna internal — and Bluetooth 2.0+EDR.
||Apple Mighty Mouse
||Power Mac G5
|Apple Order No:
|Apple Model No:
||A1117 (EMC 2023)
||Please note that these identifiers refer to more than one model.
||X 10.4.2 (8E90)
|MacOS 9 Support:
||Classic Mode Only*
||*This model is capable of using Mac OS 9 applications within the Mac OS X “Classic” environment provided with Mac OS X 10.4.11 “Tiger” and lower (“Classic” is not supported starting with Mac OS X 10.5 “Leopard”). It cannot boot into Mac OS 9.
||20.1 x 8.1 x 18.7