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Test notes
You can see our test system configurations and the like in the section below. Most of it is self-explanatory, but I should mention at least this. You'll notice that the Stoakley/Xeon 45nm system came with 16GB of RAM, while the rest of the systems had 8GB of RAM. I elected to retain the eight-DIMM, 16GB configuration for the majority of our tests, especially the power tests, since the rest of the test rigs had eight DIMMs each. The presence of additional RAM in the Stoakley box shouldn't affect the outcome of the vast majority of our tests, since they all fit comfortably into 8GB. The one potential exception is SPECjbb2005, which can use quite a bit of memory, so I tested the Stoakley/Xeon E5472 system with 8GB of RAM in SPECjbb2005.

On another note, we were unfortunately unable to include results from our Folding@Home benchmark in this review, because the bootable Linux CD's networking stack proved somehow incompatible with our Stoakley review system. We'll have to test that later.

Also, you'll see that we have an Opteron 2347 HE among the results, a new addition since our initial review of the quad-core Opterons. We're curious to see how this CPU matches up against the Xeon L5335 in performance and power use.

Our testing methods
As ever, we did our best to deliver clean benchmark numbers. Tests were run at least three times, and the results were averaged.

Our test systems were configured like so:

Processors Dual Xeon L5335 2.0GHz
Dual Xeon E5345 2.33GHz
Dual Xeon X5365 3.0GHz
Dual Xeon E5472 3.0GHz Dual Opteron 2218 HE 2.6GHz
Dual Opteron 2220 2.8GHz
Dual Opteron 2347 1.9GHz
Dual Opteron 2350 2.0GHz
Dual Opteron 2360 SE 2.5GHz
System bus 1333MHz (333MHz quad-pumped) 1600MHz (400MHz quad-pumped) 1GHz HyperTransport 1GHz HyperTransport
Motherboard SuperMicro X7DB8+ SuperMicro X7DWA Tyan Tiger K8SSA (S3992) SuperMicro H8DMU+
BIOS revision 8/13/2007 8/28/2007 5/29/2007 8/15/2007
North bridge Intel 5000P MCH Intel Seaburg MCH ServerWorks BCM 5780 Nvidia nForce Pro 3600
South bridge Intel 6321 ESB ICH Intel 6321 ESB ICH ServerWorks BCM 5785 Nvidia nForce Pro 3600
Chipset drivers INF Update 8.3.0.1013 INF Update 8.5.0.1005 - SMBus driver 4.57
Memory size 8GB (8 DIMMs) 16GB (8 DIMMs) 8GB (8 DIMMs) 8GB (8 DIMMs)
Memory type 1024MB DDR2-667 FB-DIMMs at 667MHz 2048MB DDR2-800 FB-DIMMs at 800MHz 1024MB ECC reg. DDR2-667 DIMMs at 667MHz 1024MB ECC reg. DDR2-667 DIMMs at 667MHz
CAS latency (CL) 5 5 5 5
RAS to CAS delay (tRCD) 5 5 5 5
RAS precharge (tRP) 5 5 5 5
Storage controller Intel 6321 ESB ICH with
Intel Matrix Storage Manager 7.6
Intel 6321 ESB ICH with
Intel Matrix Storage Manager 7.6
Broadcom RAIDCore with
1.1.7057.1 drivers
Nvidia nForce Pro 3600 with
6.87 drivers
Hard drive WD Caviar WD1600YD 160GB
Graphics Integrated ATI ES1000 with 6.14.10.6553 drivers
OS Windows Server 2003 R2 Enterprise x64 Edition with Service Pack 2
Power supply Ablecom PWS-702A-1R 700W

We used the following versions of our test applications:

The tests and methods we employ are usually publicly available and reproducible. If you have questions about our methods, hit our forums to talk with us about them.