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The Power Mac G5 is Apple Computer's name for models of the Power Mac which utilize the PowerPC G5 processor. The current revision of the Power Mac G5 comes in three dual-processor models with dual 1.8, dual 2.0 and dual 2.5 GHz PowerPC G5 processors, and one single 1.8 GHz PowerPC G5 processor model. The price points of these computers range from $1499 USD on the low end to $2999 USD on the high end. The G5 can communicate through its frontside bus at up to half its internal clock speed; a 2.5 GHz G5 thus has a 1.25 GHz FSB. Note, however, that the 1.8Ghz single model has a one-third bus (600Mhz). Each processor in the G5 has two unidirectional 32-bit pathways: one leading to the processor and the other from the processor. These result in a total bandwidth of up to 20 GB/s. In addition, due to the 64-bit processor (and therefore 64-bit MMU) the PowerMac G5 has a RAM capacity of eight gigabytes; eight RAM slots, and 1GB per stick, (a full four gigabytes above current theoretical limits on 32-bit processors)– though it should be noted that, despite Apple's eight gigabyte claim, it can most likely hold sixteen gigabytes, using 2GB RAM sticks. The G5 (PowerPC 970) processor itself is capable of addressing 2^64bytes of RAM– or eight exabytes (8EB)... obviously there aren't RAM modules of anywhere near that density, but it's nice to know it could do it. The memory in the PowerMac G5 is the equivalent of Dual-Channel DDR400, but Apple likes to call it "128-bit DDR" instead of Dual-Channel. This means a bandwdith of 6.4GBps. The processor at the heart of the PowerMac G5 has a " superscalar, superpipelined" execution core that can handle up to 216 in-flight instructions, and uses a 128-bit, 162-instruction SIMD unit. The large case has room, after installing the mounting plate, for four internally-powered Serial ATA hard drives for a total capacity of 1–1.6 TB (1000–1600 GB). (see G5Jam )Eleven-hundred Power Mac G5s formed the processing nodes of Virginia Tech's original Mac OS X computer cluster supercomputer (aka supercluster). The computer was soon dismantled and replaced with a new cluster made of an equal number of Apple's XserveApple Computer introduced the original Xserve in May 2002. Apple classifies the Xserve as "a high-density, 1 U rackmount server that was applauded for its value and versatility. The Xserve came with one or two PowerPC G4 processors running at 1. It had up rack-mounted servers, which also use the G5 chip running at 2.3 GHz.
1 PowerPC G5 processor
The PowerPC G5 (called the PowerPC 970FXIn computing, the PowerPC 970 and the PowerPC 970FX also known as PowerPC G5 are 64-bit processors in the PowerPC family from IBM, which was introduced in 2002. The PowerPC 970 is built using a 130nm manufacturing process, and the PowerPC 970FX is built u by its manufacturer, IBMThis article is about the International Business Machines Corporation; see IBM (disambiguation) for other uses of this abbreviation. International Business Machines Corporation IBM or colloquially, Big Blue (incorporated June 15, 1911, in operation since) is based upon IBM's Power4 processor architecture. At the introduction of the Power Mac G5, Apple announced a partnership with IBM in which IBM would continue to produce PowerPC variants of their Power processors. According to IBM's Dr. John E. Kelly, "The goal of this partnership is for Apple and IBM to come together so that Apple customers get the best of both worlds, the tremendous creativity from the Apple corporation and the tremendous technology from the IBM corporation. IBM invested over 3 billion dollars in a new lab to produce these large, 300 millimetreA millimetre ( American spelling: millimeter , symbol mm is an SI unit of length that is equal to one thousandth of a metre. 1 mm is equal to: about 0. 03937 inches 0. 1 cm See 1 E-3 m for comparisons. The level of rainfall is also reported as millimeters wafers." (This lab is a completely automated facility located in East Fishkill, New YorkEast Fishkill is a town located in Dutchess County, New York. As of the 2000 census, the town had a total population of 25,589. Currently, an IBM lab there is developing the " Cell" chip. IBM also has an advanced, automated processor fabrication facility, and figures heavily in IBM's microelectronics strategy above and beyond the partnership with Apple.) The PowerPC G5 microprocessor has over 58 million transistors on it and it incorporates IBM's 90 nanometreA nanometre ( American spelling: nanometer is 10−9 metres—or one billionth of a metre. Its symbol is nm . It is an SI measure of length, commonly used in measuring the wavelengths of visible light, ultraviolet radiation and gamma rays; amongst other (0.09 micrometreA micrometre ( American spelling: micrometer , symbol m is an SI unit of length. It is defined as one millionth of a metre (1×10−6 m), equivalent to one thousandth of a millimetre. The symbol µ ( Unicode character U+00B5; HTML µ) is the " micr) fabrication process. That's 1/1000th the diameter of a human hair. The processor is manufactured with SOI technology, and IBM's additive-copper, dual-damascene wiring process allows for copper to be used in chip wiring. This processor is the first "desktop-class computer" to implement 64-bit technology; the AMD Opteron shipped a 64-bit computer several months before, and Dec Alpha created a 64-bit chip in 1994.
Also, IBM has already built the POWER5POWER is a RISC CPU architecture designed at IBM. The name, arguably, stands for P erformance O ptimization W ith E nhanced R ISC. POWER series CPUs are used as the main CPU in many of IBM's servers, minicomputers, workstations, and supercomputers. The PO, which is rumored to be the basis for the next generation of PowerPC processors. The Power5 has multiple improvements over the POWER4 which includes IBM's version of simultaneous multithreading (known as hyper-threading to Intel users), and advanced power management features. Due to the dual core nature of the Power 5 and its inclusion of Simultaneous Multithreading, each CPU Core appear to be comprised of 4 CPUs. Other improvements include a dedicated single-tasking mode.
