Nehalem: Xeon Gets Core i7 Upgrade
Posted on: 03/29/2009 05:00 AM

Matrix-Matrix Multiply v3.5
This Matrix Multiplication benchmark computes the product of 2 square matrices of the same dimension. It can achieve near theoretical peak performance, even on modern processors. It is a key operation for realizing high performance in many of the standard tasks done in scientific computing. This includes solving large dense systems of linear equations (as in the Linpack Benchmark), and QR factorizations (to solve least square problems). Solving large dense linear systems is a key component for electro-magnetic simulations used in stealth design applications. The computation is done by the dgemm subroutine in the Intel Math Kernel Library (MKL).

The default workloads are square matrices of size 5000 to 15000 by steps of 5000. By default each multiplication is run 2 times and the average value is reported.
This is a brand new workload for me, so I kept things pretty simple. I ran it with the default settings mentioned above and then added the average times for each step in matrix size (5000, 10000 and 15000) for a total time to completion.



Nehalem wins this test as well, but it isn't quite the beat-down that we've seen in some of the previous tests. I was informed by the performance people at Intel that (like MyriMatch) this test runs faster with SMT disabled.

Power Useage



Matrix Multiply seems to put a pretty good strain on the whole CPU as again we see the fans spinning-up to offset increased system temperature towards the end of the test run.

Performance-per-Watt



POV-Ray 3.7 beta 30 x64
The Persistence of Vision Ray-Tracer creates three-dimensional, photo-realistic images using a rendering technique called ray-tracing. It reads in a text file containing information describing the objects and lighting in a scene and generates an image of that scene from the view point of a camera also described in the text file. Ray-tracing is not a fast process by any means, but it produces very high quality images with realistic reflections, shading, perspective and other effects.
I recently added POV-Ray to the benchmark suite as the latest beta releases have added 64-bit and SMP support. All results are from POV-Ray's default "Multi CPU Benchmark".



Since POV-Ray is similar to the CINEBENCH and 3ds max rendering benchmarks, I was expecting the X5580 Xeons to lay some smack down. And they did.

Power Useage



Performance-per-Watt



The Nehalem Xeons are rendering monsters, and nothing helps "performance-per-watt" like blazing fast performance... I guess lower power consumption overall doesn't hurt either.


Printed from 2CPU.com (http://www.2cpu.com/contentteller.php?ct=articles&action=pages&page=nehalem_xeon_gets_core_i7_upgrade,7.html)