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

• BIOS Version: 1.0D – February 7th, 2006.
• PCB revision: 1.0A.
• CPU: Pentium 4 640 (3.2 GHz, H.T.) socket 775.
• Cooler: Original In-a-Box.
• DDR2 Memory: Two OCZ DDR2 PC2-4200 Platinum Enhanced Bandwidth Revision 2 Limited Edition memory modules with 512 MB each, 533 MHz (3-2-2-8 1T).
• DDR Memory: Two Corsair TWINX1024-4000PRO memory modules with 512 MB each, configured in DDR Dual Channel DDR400 (3-4-4-8 1T).
• Hard disk drive: Samsung SpinPoint SP0411N (7,200 rpm, 40 GB, ATA-133).
• Video Cards (PCI Express): GeForce 6600 GT 128 MB.
• Video Cards (AGP): GeForce 6600 GT.
• Video Resolution: 1024x768x32-75Hz.
• Power Supply: Seventeam ST420BKV-03F.

Software Configuration

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

Driver Versions

• NVIDIA video driver version : 71.89 WHQL.
• NVIDIA nForce driver version (nForce4 SLI Intel Edition): Beta NVIDIA C19.
• NVIDIA nForce driver version (nForce4 SLI XE): 8.22.
• Intel driver version (PCI Express): 7.0.0.1025.
• Intel driver version (AGP): 7.2.1.1003.
• Creative audio driver version: 5.12.01.356.
• High Definition Audio driver version: Realtek 1.19.
• Realtek 850 Audio driver version: A3.73a.
• C-Media Audio driver version: 5.12.01.0008.

Used Software

• SYSmark2004 – Patch 2
• PCMark04 Business 1.3.0
• 3DMark2001 SE 3.3.0
• 3DMark03 Pro 3.6.0
• 3DMark05 Pro 1.2.0
• Doom 3
• Quake III Arena 1.32

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.