During our benchmarking sessions we used the configuration listed below. Between our benchmarking sessions the only variable device was the motherboard being tested.
 
Hardware Configuration

• BIOS version: July 4th, 2007
• Motherboard revision: N/A
• Processor: Core 2 Duo E6700 (2.66 GHz, 1,066 MHz FSB, 4 MB L2 memory cache).
• Cooler: Intel.
• Memory: 2 GB DDR2-1066/PC2-8500 with 5-5-5-15 timings, two Patriot PDC21G8500ELK modules (512 MB each) and two Corsair CM2X512-8500C5 modules (512 MB each).
• Hard Disk Drive: Samsung HD080HJ (SATA-300, 7,200 rpm, 8 MB buffer).
• Video Card: MSI factory-overclocked  GeForce 8800 GTS 320 MB (NX8800GTS-T2D320E-HD OC).
• Video resolution: 1024x768x32@85Hz.
• Power Supply: Antec Neo HE 550.

Software Configuration

• Windows XP Professional installed using NTFS
• Service Pack 2
• DirectX 9.0c

Driver Versions

• nVidia video driver version : 158.22
• nVidia nForce driver version: 9.53
• Intel Inf chipset driver version: 8.3.1.1013
• Realtek Audio driver: R1.62
• Realtek network driver: 5.663.1212.2006

Used Software

• SYSmark2004 – Patch 2
• PCMark05 Professional 1.1.0
• Quake 4 – Patch 1.3

We adopted a 3% error margin. Thus differences below 3% cannot be considered relevant. In other words, products with a performance difference below 3% should be considered as having similar performance.