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: May 11th, 2007
• Motherboard revision: 1.0A
• Processor: Athlon 64 X2 5000+ (2.6 GHz) with 512 KB L2 cache.
• Cooler: AMD.
• Memory: Two Corsair PC8500 CM2X512-8500 modules with 512 MB each, installed under DDR2 dual channel configuration (5-5-5-15 timings).
• Hard Drive: Samsung HD080HJ (SATA-300, 7,200 rpm, 8 MB buffer).
• Video Cards: XFX GeForce 6200 TC 64 MB 64-bit, Leadtek GeForce 6200 128 MB 128-bit and MSI factory-overclocked  GeForce 8800 GTS 320 MB.
• 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

• ATI video and chipset driver version: 7.2 IGP
• Nvidia video driver version: 93.71 (on GeForce 6100 and 6200)
• Nvidia video driver version: 101.17 (on GeForce 7025)
• Nvidia video driver version: 158.22 (on GeForce 8800 GTS)
• Nvidia nForce chipset driver version: 8.26 (on ECS GeForce6100SM)
• Nvidia nForce chipset driver version: 14.10 (on Abit AN-M2)
• Nvidia nForce chipset driver version: 9.35 (on ASUS M2N32-SLI Deluxe)
• Audio driver version: Realtek R1.60
• Audio driver version: Realtek A3.86 (on ECS RS485M-M)

Used Software

• SYSmark2004 – Patch 2
• PCMark05 Professional 1.2.0
• 3DMark 2001 SE 3.3.0
• 3DMark03 3.6.0
• 3DMark05 1.2.0
• 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.