Apple Power Macintosh G5 Dual Core (2.0), Late 2005 - M9590LL/A - PowerMac11,2 - A1117

Apple Power Mac G5The Power Macintosh G5 Dual Core (2.0), along with thePower Macintosh G5 Dual Core (2.3) and Power Macintosh G5 "Quad Core" (2.5), 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.

The Power Macintosh G5 Dual Core (2.0) is powered by a single "dual core" 2.0 GHz PowerPC 970MP (G5) processor with dual optimized AltiVec "Velocity Engine" vector processing units (one per core), four double-precision FPUs (two per core), 1 MB of on-chip level 2 cache on each core, and a 1.0 GHz frontside system bus. It shipped configured with 512 MB of 533 MHz PC2-4200 DDR2 SDRAM, a 160 GB (7200 RPM) Serial ATA hard drive, a reported "16X" dual-layer "SuperDrive", and a NVIDIA GeForce 6600 LE video card with 128 MB of GDDR SDRAM.

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 Dual Core (2.0) 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. Likewise, it is divided into four different thermal zones with nine computer-controlled fans for optimum cooling.

Download: PDF Manual

October 19, 2005August 7, 2006
Details:The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" refers to the date a model either was replaced by a subsequent system or production otherwise ended.

Also see: All Macs introduced in 2005.
2.0 GHzPowerPC 970MP (G5)
Details:The PowerPC 970MP "G5" has two independent 2.0 GHz processor "cores" on a single silicon chip. 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."

Also see: How fast are the "Dual" and "Quad" Core Power Mac G5 models compared to earlier ones?
1 (2 Cores)1814 & 1882
Details:Geekbench 2 benchmarks are in 32-bit and 64-bit modes, respectively. These numbers reflect an average of user provided 32-bit and 64-bit results as submitted to the Geekbench websiteHigher numbers are better. 

You also might be interested in reviewing all 32-bit and 64-bitGeekbench 2 user submissions for Macs with the PowerMac11,2 Model Identifier, which may include multiple models.

To dynamically compare Geekbench results from different Macs side-by-side, see's Ultimate Mac Comparison.
G5 DaughtercardIntegrated
Details:The Power Macintosh G5 models have the processor(s) mounted on a custom 300-pin daughtercard, but it is not feasible to upgrade the processor.

Also see: Is the CPU on the Power Mac G5 upgradable? How is it mounted?
1.0 GHz (2:1)2.0 GHz (Built-in)
Details:Apple notes that the system has a "single 1 GHz 64-bit DDR bidirectional frontside bus".
Open Firmware1 MB
Details:Boot ROM and around 1 MB, other instructions are loaded into RAM (NewWorld).
32k/64k1 MB
Details:32k level 1 data cache, 64k level 1 instructional cache. The 1 MB on-chip level 2 cache runs at processor speed.
PC2-4200 DDR2533 MHz
Details:Supports 533 MHz PC2-4200 DDR2 SDRAM.

Also see: How do you upgrade the RAM in the Power Mac G5 models?
512 MB16 GB
Details:Installed as two 256 MB modules. Memory must be installed in pairs.

In the US (and many other countries), site sponsor Other World Computing sells memory -- as well as other upgrades -- for this Power Macintosh G5.

In Canada, site sponsor The Mac Market sells memory and other upgrades for this Power Macintosh G5.

Also see: Actual Max RAM of All G3 & Later Macs.
Details:Apple notes that the system features a "128-bit memory controller and data path".

Also see: How much RAM of what type does the Power Mac G5 support? Which models have four RAM slots and which models have eight RAM slots?
Details:The NVIDIA GeForce 6600 LE with 128 MB of GDDR SDRAM occupies a 16-lane PCI Express slot.

Also see: What graphics cards are provided by the Power Mac G5? Which have ADC ports and which have DVI ports?
128 MB128 MB
Details:NVIDIA GeForce 6600 with 256 MB of GDDR SDRAM, NVIDIA GeForce 7800 GT with 256 MB of GDDR3 SDRAM, and NVIDIA Quadro FX 4500 with 512 MB of GDDR3 SDRAM were available at the time of purchase via build-to-order. Other graphics cards could be pre-installed at the time of purchase or installed later.
Dual Displays*2560x1600
Details:Apple advertised that this system can support "two Apple flat-panel displays for each graphics card installed". The default graphics card can support "up to 2560 by 1600 pixels" with the dual-link DVI port and "up to 1920 by 1200 pixels" with the single-link DVI port. It also can support analog resolutions "up to 2048 by 1536 pixels".
Details:The default graphics card can support a second display with a maximum resolution of 1920x1200 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 2560x1600 displays, like the 30-inch Apple Cinema Display models.
160 GB (7200 RPM)Serial ATA (1.5 Gb/s)
Details:Officially supports two hard drives. One installed by default. Not compatible with Ultra ATA drives without an adapter.

Also see: How many hard drives of what type are supported in the Power Mac G5? How do you replace the drive or add another one? Are there third-party products to use more drives than are "officially" supported?

In the US (and many other countries), site sponsor Other World Computing sells storage upgrades for this Power Mac G5.
6X DL "SuperDrive"None
Details: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.

Also see: What are the capabilities of the "SuperDrive" provided by the Power Mac G5? How do you upgrade or replace the optical drive?
NoneGigabit (x2)
Details:External USB modem optional. The system has "two independent 10/100/1000BASE-T [Gigabit] Ethernet (RJ-45) interfaces with support for jumbo frames."
802.11b/g (Optional)2.0+EDR (Optional)
Details:Expansion slots for AirPort Extreme (802.11g) card and Bluetooth 2.0+EDR module. Both optional at the time of purchase.
4 (2.0)2 (400), 1 (800)
Details: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/BL2 3.5", 1 5.25"
Details: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.

In the default configuration, one internal 3.5" bay is occupied by a hard drive and one is free, and the single external 5.25" bay is occupied by a "SuperDrive" optical drive.

Also see: Which Power Mac G5 models have PCI, PCI-X, and PCI Express slots? How many PCI slots of what speed does each Power Mac G5 have? How do you install a PCI card?
Apple KeyboardApple Mighty Mouse
Details:Also included a USB keyboard extension cable.
TowerPower Mac G5
M9590LL/ALate 2005
Details:The Apple order number should be unique to this system. Also see:What are the primary differences between the "Late 2005" or "Dual Core" Power Mac G5 models?
A1117 (EMC 2023)PowerMac11,2
Details:Please note that these identifiers refer to more than one model.

Also see: All Macs with the A1117 Model Number, the 2023 EMC Number, and the PowerMac11,2 Model Identifier.

For more about these identifiers and how to locate them on each Mac, please refer to's Mac Identification section.
X 10.4.2 (8E90)X 10.5.8
Details:This system cannot run versions of MacOS X more recent than 10.5.8.
Classic Mode Only*Emulation Only
Details:*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.

Site sponsor OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.
20.1 x 8.1 x 18.744.5-48.8 lbs.
Details:In inches - height by width by depth, (51.1 cm, 20.6 cm, 47.5 cm). Weight in kilograms is 20.2-22.1 kg.
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.