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===Hard drives===
===Hard drives===


The Mac Pro has room for four internal standard 3.5" [[hard drive]]s, in sizes up to the current maximum available running at 7200-rpm or 15,000-rpm, each with its own [[Serial ATA|SATA-300]] port. With the addition of a [[SAS|Serial Attached SCSI]] capable RAID card, SAS drives can be used with the SATA ports. The hard drives are mounted on individual trays (also known as 'sleds'), provided with the machine, by captive thumbscrews similar to the one used for the PCIe slots. There are no cables to be attached, the SATA and power connectors are firmly attached to the case, and the drive is connected to them simply by pushing it in. The case lock on the back of the machine locks the trays into position. The Mac Pro now offers hardware [[RAID]] circuitry<ref>[http://www.apple.com/macpro/expansion.html Apple<!-- Bot gener1ated title -->]</ref>. Two optical [[drive bay]]s are available, each with a SATA-300 port and an [[AT Attachment|ATA-100]] port. Many [[optical drive]]s still use the older ATA ports, including those currently being shipped with the machines.
The Mac Pro has room for four internal standard 3.5" [[hard drive]]s, in sizes up to the current maximum available running at 7200-rpm or 15,000-rpm, each with its own [[Serial ATA|SATA-300]] port. With the addition of a [[Serial Attached SCSI|SAS]] capable RAID card, SAS drives can be used with the SATA ports. The hard drives are mounted on individual trays (also known as 'sleds'), provided with the machine, by captive thumbscrews similar to the one used for the PCIe slots. There are no cables to be attached, the SATA and power connectors are firmly attached to the case, and the drive is connected to them simply by pushing it in. The case lock on the back of the machine locks the trays into position. The Mac Pro now offers hardware [[RAID]] circuitry<ref>[http://www.apple.com/macpro/expansion.html Apple<!-- Bot gener1ated title -->]</ref>. Two optical [[drive bay]]s are available, each with a SATA-300 port and an [[AT Attachment|ATA-100]] port. Many [[optical drive]]s still use the older ATA ports, including those currently being shipped with the machines.


The Mac Pro has 1 P-ATA port (for up to two P-ATA devices) and a total of 6 SATA ports, 4 integrated in to the drive bays, and two internal SATA ports that are not connected to drive bays. These extra SATA ports can be put into service through the use of after-market extender cables, for use with internal Optical drives, or to provide E-SATA ports.<ref>[http://www.newertech.com/products/esata_cable.php NewerTech eSATA Extender Cable<!-- Bot generated title -->]</ref>
The Mac Pro has 1 P-ATA port (for up to two P-ATA devices) and a total of 6 SATA ports, 4 integrated in to the drive bays, and two internal SATA ports that are not connected to drive bays. These extra SATA ports can be put into service through the use of after-market extender cables, for use with internal Optical drives, or to provide E-SATA ports.<ref>[http://www.newertech.com/products/esata_cable.php NewerTech eSATA Extender Cable<!-- Bot generated title -->]</ref>

Revision as of 23:30, 24 March 2009

Mac Pro
DeveloperApple Inc.
TypeWorkstation
Release dateMarch 3, 2009 (current model)
August 7, 2006 (original release)
Introductory priceUSD$2,499
CPUIntel Xeon "Nehalem" (current model)
Intel Xeon "Woodcrest" (original release)
Websitewww.apple.com/macpro/

The Mac Pro is a workstation computer manufactured by Apple Inc. The machines are based on Xeon microprocessors, but are similar to the Power Mac G5 they replaced in terms of outward appearance and expansion capabilities. They are currently one of three desktop computers in the Macintosh lineup. The Mac Pro is currently the fastest computer that Apple has to offer.

The Mac Pro was formally announced on August 7, 2006 at WWDC.[1] Along with the Mac Pro, a new Xeon-based Xserve was also announced, completing Apple's transition from the PowerPC to x86 architecture. On January 8, 2008 Apple unveiled the first 3.2 GHz, dual quad-core Intel Xeon (Harpertown 45 nm) -based Mac Pro.[2] The current Mac Pro was unveiled on March 3, 2009, featuring the new Intel Xeon processors based on the Nehalem micro-architecture as well as a lower entry price.

Overview

An Intel-based replacement for the Power Mac G5 had long been expected prior to the release of the Mac Pro. The iMac, Mac Mini, MacBook and MacBook Pro had moved to an Intel-based architecture starting in January 2006, leaving the Power Mac G5 as the only machine in the Mac lineup still based on the PowerPC. Speculation about the G5's eventual replacement was common. Rumors initially expected the machine to differ physically from the existing G5 and considered a number of different possible internal configurations based on different chipsets. But the coincidence of Intel releasing a new Core 2-based Xeon workstation platform just prior to the 2006 Worldwide Developers Conference (WWDC) made it fairly obvious that the resulting machine would be based on it. Even the naming was "obvious"; Apple had dropped the term "Power" from the other machines in their lineup, and started using "Pro" on their higher-end laptop offerings. As such, the name "Mac Pro" was widely used before the machine was announced.[3]

The Mac Pro is a high-end computer, similar to higher end Unix workstations from vendors such as SGI or Sun Microsystems. Although the high-end technical market has not traditionally been an area of strength for Apple, the company has been positioning itself as a leader in non-linear digital editing for high-definition video,[4] which demands storage and memory far in excess of a general desktop machine. Additionally, the codecs used in these applications are generally processor intensive and highly threadable, speeding up almost linearly with additional processor cores. Apple's previous machine aimed at this market, the Power Mac G5, had up to two dual-core processors, but lacked the storage expansion capabilities of the newer design. In order to serve this market, Apple sells a variety of standardized bundles combining a Mac Pro with fairly high-end components; for instance, all available setups can support the 30" Cinema Display.

In general, the Mac Pro has been well received in the press.[5] The combination of high performance, reasonable expandability, very quiet operation and superb mechanical design makes it routinely appear as the comparison system against which other systems are measured. The Xeon platform is, however, Intel's "high end" system and not aimed at more general purpose use. Nevertheless, current-generation Xeons are priced competitively with their high-end desktop platforms, allowing Apple to sell a very powerful system at price points that are considered quite competitive, even by reviewers who do not normally review Apple systems. Although selecting more expensive components can increase the price above $20,000.[6]

Original marketing materials for the Mac Pro generally referred to the middle-of-the-line model with 2 × dual-core 2.66 GHz processors. Previously, Apple featured the base model with the words "starting at" or "from" when describing the pricing, but the online Apple Store listed the "Mac Pro at $2499", the price for the mid-range model. The base model could be configured at US$2299, much more comparable with the former base-model dual-core G5 at US$1999, although offering considerably more processing power. Post revision, the default configurations for the Mac Pro includes one quad-core Xeon 3500,2.66GHz or two quad-core Xeon 5500s at 2.26 GHz each.

There is a large price and performance gap between the Mac Pro and Apple's most powerful consumer machine, the iMac. The Mac Pro is the only machine in Apple's lineup that allows the end user to change the graphics card or otherwise install internal upgrades beyond RAM. Other machines in the lineup use integrated graphics and higher cost laptop parts, while the Mac Pro uses the industry standard PCIe slots. The iMac series use graphics cards and processors that are technically replaceable by a user, though the case design restricts access and the iMac's MXM graphics are difficult to upgrade due to lack of standards compliance[citation needed]. This has led to calls for a smaller, mid range machine with more limited expansion capabilities but retaining additional PCIe slots, similar to many models of Power Macintosh.[7]

Description

The specifications below are from Apple's "tech specs" page[8] or developer notes[9], except where noted.

Processors

The Mac Pro uses either one Xeon 3500 or two Xeon 5500 "Nehalem" 64-bit CPUs for a total of four or eight processor cores. Each CPU chip has 8MB on-chip L3 cache shared among its processor cores.[10] Because the most recent revision is based on the Nehalem architecture, the old Front Side Bus technology has been replaced by the Intel QuickPath Interconnect interface. Each processor is capable of Turbo Boost, which dynamically boosts the clock rate of a core if the temperature does not climb too high.

Memory

The original Mac Pro's main memory used 667MHz DDR2 ECC FB-DIMMs; the early 2008 model used 800MHz ECC DDR2 FB-DIMMS, the current Mac Pro uses 1066MHz DDR3 ECC DIMMs. In the original and 2008 models, these modules are installed in pairs, one each on two riser cards. The cards have 4 DIMM slots each, allowing a total of 32GB of memory (8 x 4GB) to be installed [11]. Notably, due to its FB-DIMM architecture, installing more RAM in the Mac Pro will improve its memory bandwidth, but may also increase its memory latency.[12] With a simple install of a single FB-DIMM the peak bandwidth is 8GB/s, but this can increase to 16GB/s by installing two FB-DIMMs, one on each of the two buses, which is the default configuration from Apple. While electrically the FB-DIMMs are standard, Apple requests that users use larger-than-normal heatsinks on the memory modules that they install. Problems have been reported by users who have used third party RAM that had normal sized FB-DIMM heatsinks.[13](see notes below).

Hard drives

The Mac Pro has room for four internal standard 3.5" hard drives, in sizes up to the current maximum available running at 7200-rpm or 15,000-rpm, each with its own SATA-300 port. With the addition of a SAS capable RAID card, SAS drives can be used with the SATA ports. The hard drives are mounted on individual trays (also known as 'sleds'), provided with the machine, by captive thumbscrews similar to the one used for the PCIe slots. There are no cables to be attached, the SATA and power connectors are firmly attached to the case, and the drive is connected to them simply by pushing it in. The case lock on the back of the machine locks the trays into position. The Mac Pro now offers hardware RAID circuitry[14]. Two optical drive bays are available, each with a SATA-300 port and an ATA-100 port. Many optical drives still use the older ATA ports, including those currently being shipped with the machines.

The Mac Pro has 1 P-ATA port (for up to two P-ATA devices) and a total of 6 SATA ports, 4 integrated in to the drive bays, and two internal SATA ports that are not connected to drive bays. These extra SATA ports can be put into service through the use of after-market extender cables, for use with internal Optical drives, or to provide E-SATA ports.[15]

Expansion cards

For internal expansion the current Mac Pro has four PCI Express (PCIe) 2.0 expansion slot. The 2008 model had two PCI Express (PCIe) 2.0 expansion slots and two PCI Express 1.1 slots, providing them with up to 300 W of power in total. The first slot is double wide and intended to hold the main video card, arranged with an empty area the width of a normal card beside it in order to leave room for the large coolers modern cards often use. In most machines, one slot would be blocked by the cooler. Instead of the tiny screws typically used to fasten the cards to the case, in the Mac Pro a single "bar" holds the cards in place, which is itself held in place by two "captive" thumbscrews that can be loosened by hand without tools and will not fall out of the case.

The PCIe slots can be configured individually to give more bandwidth to devices that require it, with a total of 40 "lanes", or 13 GB/s total throughput. When running Mac OS X, the Mac Pro currently does not support SLI or ATI CrossFire, limiting its ability to use the latest "high-end gaming" video card products; however, individuals have reported success with both CrossFire and SLI installations when running Windows XP.[16] SLI/CrossFire is largely a function of software.

The bandwidth allocation of the PCIe slots can be configured via the Expansion Slot Utility included with Mac OS X only on the August 2006 Mac Pro. The Mac Pro (Early 2008) has its slots hardwired as follows.

Default
Slot 4 4x
Slot 3 4x
Slot 2 16x
Slot 1 (Double-Wide) 16x

External connectivity

For external connectivity the system includes five USB 2.0 and four FireWire ports, two of the latter being FireWire 800. Networking is supported with two built-in Gigabit Ethernet ports, while 802.11 a/b/g/draft-n[17] Wi-Fi is supported via an optional AirPort Extreme card. Bluetooth is now standard. Unlike other recent Mac products, the Mac Pro does not include the infrared receiver needed to use the Apple Remote. However, Front Row is available on all Mac Pros running Mac OS 10.5 (Leopard) or later, and is accessible using the normal ⌘-Esc key combination. The system also provides both digital (optical) and analogue "headphone jacks" for sound in and out, the latter available on both the front and back of the case.

Case

The exterior of the aluminum case is very similar to that of the Power Mac G5, with the exception of an additional optical drive bay, and a new arrangement of I/O ports on both the front and the back. The case is somewhat larger than another PC of the same generation, at 20 × 18½ × 8 inches, compared to another desktop PC (the Dell Dimension 9100) at 17½ × 17½ × 6½ inches. Some of the difference in height is due to the "handles" on the top and bottom of the case. The case can be opened by operating a single lever on the back, which unlocks one of the two sides of the machine, as well as the drive bays. All of the expansion slots for memory, PCIe cards and drives can be accessed with the one panel removed, and require no tools for installation.

The Xeon processors generate much less heat than the previous dual-core G5s, so the size of the internal cooling devices has been reduced significantly. This allowed the interior to be re-arranged, leaving more room at the top of the case and thereby allowing the drives to double in number. Less heat also means less air to move out of the case for cooling during normal operations; the Mac Pro is very quiet in normal operation, quieter than the already-quiet Power Mac G5[18] [19] , and proved difficult to measure using common decibel meters.[20]

Specifications

Component Intel Xeon (based on Core microarchitecture) Intel Xeon (based on Nehalem microarchitecture)
Model Mac Pro[21] Mac Pro (Early 2008)[22] Mac Pro (Early 2009)[23]
Chipset Intel 5000X Intel 5400 Intel Nehalem-based server chipset
Graphics
Expandable to four graphics cards 		nVidia GeForce 7300 GT with 256MB of GDDR3 SDRAM (single-link and dual-link DVI ports)
Optional ATI Radeon X1900 XT with 512MB GDDR3 SDRAM (two dual-link DVI ports) or nVidia Quadro FX 4500 with 512MB GDDR3 SDRAM (stereo 3D and two dual-link DVI ports) 		ATI Radeon HD 2600 XT with 256MB of GDDR3 SDRAM (two dual-link DVI ports)
Optional nVidia GeForce 8800 GT with 512MB GDDR3 SDRAM (two dual-link DVI ports) or nVidia Quadro FX 5600 1.5GB (stereo 3D, two dual-link DVI ports) 		nVidia GeForce GT 120 with 512MB of GDDR3 SDRAM (one mini-DisplayPort and one dual-link DVI port)
Optional ATI Radeon HD 4870 with 512MB of GDDR5 SDRAM (one Mini DisplayPort and one dual-link DVI port)
Hard drive
7200-rpm unless specified 		250GB Serial ATA with 8MB cache
Optional 500GB with 8MB cache or 750GB with 16MB cache 		320GB Serial ATA with 8MB cache
Optional 500GB, 750GB, or 1TB Serial ATA with 16MB cache or 300GB Serial Attached SCSI, 15,000-rpm with 16MB cache 		640GB Serial ATA with 16MB cache
Optional 1TB Serial ATA with 16MB cache
Processor Two 2.66GHz Dual-core Intel Xeon Woodcrest
Optional 2.0GHz, 2.66GHz or 3.0GHz Dual-core or 3.0GHz Quad-core 		Two 2.8GHz Quad-Core Intel Xeon Harpertown
Optional two 3.0GHz or 3.2GHz Quad-core processors or one 2.8GHz Quad-core processor 		One 2.66GHz Quad-Core Intel Xeon 3500 or two 2.26GHz Quad-core Intel Xeon 5500 with 8MB of L3 cache
Optional 2.93GHz Quad-core Intel Xeon 3500 processor or two 2.66GHz or 2.93GHz Quad-core Intel Xeon 5500 processors
Memory 1GB (two 512MB) of 667MHz DDR2 ECC fully buffered DIMM
Expandable to 16GB 		2GB (two 1GB) of 800MHz DDR2 ECC fully buffered DIMM
Expandable to 32GB 		3GB (three 1GB) or 6GB (three 2GB) of 1066MHz DDR3 ECC DIMM
Expandable to 8GB on Quad-core model, and 32GB in 8-core models
Front side bus 1333MHz 1600MHz Replaced by Intel QuickPath Interconnect
AirPort Extreme Optional 802.11a/b/g and draft-n (n disabled by default) Optional 802.11a/b/g and draft-n (n-enabled)
Optical drive 16x SuperDrive with double-layer support (DVD±R DL/DVD±RW/CD-RW) 18x SuperDrive with double-layer support (DVD±R DL/DVD±RW/CD-RW)

Operating systems

The Mac Pro comes with the BIOS successor EFI 1.1 and handles booting differently from the conventional BIOS-based PC.

Apple's Boot Camp provides BIOS backwards compatibility , allowing dual and triple boot configurations.[24] These operating systems are easily installable on Intel x86 based Apple computers:

  • Mac OS X 10.5.0 and later
  • Microsoft Windows XP and Vista 32-bit & 64-bit (hardware drivers are included in Boot Camp)
  • Other 80x86 operating systems such as Linux x86 Solaris, DOS, BeOS, and BSD (which is very closely related to Mac OS X)

This is made possible by the presence of an x86 Intel architecture as provided by the CPU and the BIOS emulation Apple has provided on top of EFI. Note that installing any additional operating system other than Windows is not supported by Apple, because the Boot Camp drivers are Windows only. However, it is often possible to achieve full or nearly full compatibility with another OS by using 3rd-party drivers.

There are a number of challenges that one must face when trying to establish a multi-booting configuration on a single hard drive that uses the new GPT partitioning standard that Mac OS takes advantage of at the same time as MBR, which is commonly used by Windows and Linux (though Linux can use GPT). One must synchronize their GPT and MBR partition tables multiple times during the setup of such configurations. The key challenge being that a maximum of 4 partitions can be made on any such hard drive (including the EFI partition). This is because logical & extended MBR partitions are not possible which means that more than 4 partitions can not be referenced for the MBR component of the configuration. Thus having more partitions would force MBR and GPT to have differing partitioning schemes. The diskutil command-line app in Mac OS X (in addition to numerous 3rd-party graphical packages) can non-destructively resize a single partitioned HFS+ formatted volume to a scheme usable for dual/triple boot configurations with BIOS/MBR.

Compatibility

Software

  • Software (PPC Emulation) - PowerPC-Native Applications: As the Mac Pro uses a different hardware platform than earlier PPC Macintoshes, it is incapable of running PPC applications natively. It instead uses the Rosetta PPC emulator to seamlessly run PPC applications, though at some performance penalty. Due to the manner in which Apple chose to implement it, Rosetta is incapable of emulating some lower level PPC code, and does not support 64-bit (G5 specific) PPC features.
  • Software (Classic Emulation) - Classic (Mac OS 9.x and earlier): Intel-based Macs do not support Mac OS X's Classic emulation environment, although third-party emulators such as SheepShaver may allow these applications to run.
  • OS Minimums - The lowest version of the operating system that will support the Mac Pro is Mac OS X version 10.4.7. Earlier versions will not boot the computer.
  • As of July 2008, the Mac Pro (Early 2008 model, and possibly others) only supports hardware virtualization for users running Mac OS X. This is because Intel Hardware Virtualization is switched off at boot time by the EFI. Virtualization products such as Parallels Desktop for Mac can still enable the hardware virtualization after the OS has loaded, but only under Mac OS X. A similar bug in the Mac Mini was later fixed through a firmware update. [25] It is still possible to enable the hardware virtualization under Windows using CrystalCPUID's MSR walker. It is also possible to enable it under Linux by loading the MSR module, and using that to write to the appropriate register. Once it is enabled, and locked on, it can only be disabled by physically removing the power supply from the Mac Pro.

Hardware

  • PCI-Express slots are not normally backwards compatible with prior versions of PCI hardware, such as PCI/33, PCI/66 or PCI-X. Some internal adapters and external chassis do offer PCIe-PCI compatibility. The PCIe 2.0 slots on the January 2008 Mac Pro are backwards compatible with PCIe 1.1 hardware.
  • Apple recommends an Apple-specified heat sink on each memory DIMM for cooling, and the required on-chip thermal manager may shut down memory, or increase fan speed, if it starts to overheat.[13] Several third-party, self-installable memory upgrades that include Apple-specified heat sinks are available.
  • The Mac Pro, as with other platforms, requires Mac OS X compatible firmware. That is to say, a PCIe video card designed exclusively for other operating systems will not work properly under Mac OS X without appropriate drivers and/or firmware, however, they will work under the operating systems they were designed for, installed via Boot Camp or other means. Some video cards and other hardware accessories not marketed for Macintoshes can nonetheless be tricked into compatibility through combination with software extracted from similar Macintosh hardware. Also, AMD released the ATI Radeon HD 3870 which is compatible with both Mac Pros and PCs from other manufacturers.

References

  1. ^ Keynote presentation at the Worldwide Developers Conference, August 7, 2006.
  2. ^ "Apple adds 8-core option to Mac Pro". MacNN.
  3. ^ Peering inside the aluminum ball: Woodcrest, Conroe, and the "pro" Macs
  4. ^ "Apple's High Definition Future". Jim Hill Media.
  5. ^ "Mac Pro review, 9 out of 10". Ars Technica.
  6. ^ "Mac Pro vs. Dell Precision: A price comparison". Paul Thurrott's Internet Nexus.
  7. ^ "Night of the Living xMac". Ars Technica.
  8. ^ "Mac Pro tech specs". Apple, Inc.
  9. ^ "Mac Pro Developer Note". Apple, Inc.
  10. ^ Sizes of transistorized memory, such as RAM and cache, are binary values whereby 1 MB = 220 (1,048,576) bytes and 1 GB = 230 (1,073,741,824) bytes.
  11. ^ Computer memory upgrades for Apple Mac Pro (4-core) Desktop/PC from Crucial.com
  12. ^ "Understanding FB-DIMMs". AnandTech.
  13. ^ a b "Mac Pro Memory Issues". Ars Technica.
  14. ^ Apple
  15. ^ NewerTech eSATA Extender Cable
  16. ^ "The Mac Pro is SLI capable?". MacUser.
  17. ^ AirPort Extreme performance page see footnote 2
  18. ^ "Mac Pro". Ars Technica.
  19. ^ "PowerMac G5 review". Macworld.
  20. ^ "Bare Feats' rob-ART Morgan says:". Bare Feats'.
  21. ^ Mac Pro - Technical Specifications, Apple Inc., retrieved 2009-03-03
  22. ^ Mac Pro (Early 2008) - Technical Specifications, Apple Inc., retrieved 2009-03-03
  23. ^ Mac Pro (Early 2009) - Technical Specifications, Apple Inc., retrieved 2009-03-03
  24. ^ Triple Boot via BootCamp
  25. ^ "Parallels Forum".
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