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: F3 – April 7th, 2006.
• PCB revision: 01.
• 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, GeForce 6200 128MB and GeForce 6200 TurboCache 64 MB 64-bit.
• Video Cards (AGP): GeForce 6600 GT and GeForce FX 5200 128MB 128-bit.
• 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.
• ATI video and chipset driver version: Catalyst 5.6.
• Intel video driver version: 14.14.0.4332.
• Intel PCI Express Inf driver version: 7.0.0.1025.
• Intel AGP Inf driver version: 7.2.1.1003.
• ULi driver version: 6.2.0.3.
• 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.