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#2009 APPLE 8 CORE MAC PRO NEHALEM OSX MEMORY PRO#
#2009 APPLE 8 CORE MAC PRO NEHALEM OSX MEMORY SERIES#
#2009 APPLE 8 CORE MAC PRO NEHALEM OSX MEMORY MAC#

One of my own favorite tests is the single threaded, minimal I/O, floating point computational punch when computing 100 million sines. As a result it's not easy to put systems on a common ground, and one has to dig to find benchmarks that put all systems on a common ground.

#2009 APPLE 8 CORE MAC PRO NEHALEM OSX MEMORY MAC#

Taken together, these tests provide an overall a feel for the span from the dual processor 2.0 GHz Power Mac G5, late 2003, to the current Mac Pros.īenchmarks test a wide range of a system's capabilities: the memory bandwidth, I/O bandwidth, scalar processor performance, vector processor performance, utilization of threads, and so on.

#2009 APPLE 8 CORE MAC PRO NEHALEM OSX MEMORY PRO#

Apple's own tests suggest a speed of about twice the previous generation Mac Pro in specific tests.Īwhile back, Macintouch compared the previous generation Mac Pros to the older G5 Power Macs using a wide variety of tests. That's about as fast as the fastest Cray supercomputer from 1993.īenchmarks designed for typical Mac users are easily found using suites like Photoshop and Cinebench where improvements from the previous generation Mac Pro ranged from 12 percent for Cinebench to over 2x for a Photoshop CS4 test of 25 actions on a 500 MB image. Estimated speed of Dual Processor (8 core) core Mac Pro: 90 gigaflops.This is a suite of instructions, for the sake of simplicity, that allows a single instruction to operate on an array of data. SSE4 (4.2) SIMD (Single Instruction, Multiple Data) Vector Processor, Intel's equivalent of the old AltiVec/Velocity Engine in the IBM and Freescale CPUs.8 MB 元 cache shared by all processors.32 KB L1 instruction and data cache per core.However, the slight gain in speed of a 3 GB system vs the advantage of, say, a 4 GB system hasn't yet been quantified. That's why the Mac Pro base system ships in increments of 3 slots x 1 GB. However, at idle, the Nehalem uses about half the power of its predecessor, Harpertown and uses about 30 percent less power than Harpertown for the same overall performance.

#2009 APPLE 8 CORE MAC PRO NEHALEM OSX MEMORY SERIES#

Average power consumption for the X55xx series is 95 watts.

Quad core Nehalem has a total of 731 million transistors.

Here are some additional technical specifications of interest: Intel's Nehalem architecture does away with that bus contention and can triple the memory bandwidth compared to the older Intel Xeon 5400. Previous experience has shown that as the number of cores increase, and they compete for bandwidth on the FSB, what's called "bus contention" occurs, slowing down the system. This is a highspeed, point-to-point interconnect that does away with the legacy Front Side Bus (FSB).

QuickPath Technology and Integrated Memory Controller.

Developers are going to need all the help they can get from Apple's Grand Central technology to fully exploit a system like this. So, under the best of circumstances, an eight core Mac Pro could be running 16 simultaneous threads. Intel first experimented with this technology in the Pentium 4.

Simultaneous Multithreading, SMT Also called hyper-threading, this feature allows a core to manage two virtual threads.

Apple says that a 2.93 GHz system can boost to 3.33 GHz (3 increments).

This is no substitute for the developer exploiting all the cores fully, but it is a useful stopgap.

Each individual core can be boosted or the entire suite of cores at oncecan be accelerated. The CPU can, during heavy computational loads, boost its speed in increments of 133 MHz until the thermal threshold is reached. The Nehalem series, based on a 45 nanometer (nm) process, has several, notable technical improvements that will be of interest to Mac Pro users, namely: These CPUs use a revolutionary new architecture that paves the way for processors of the future and provide the new Mac Pros from early 2009 a hefty computational punch. Apple has chosen the Intel Xeon 5500 (8 core) and 3500 series (quad core) CPU (code named "Nehalem") for its newest generation Mac Pro.