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: 1.0c – May 19th, 2006.
• Motherboard revision: 1.0.
• 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: Maxtor DiamondMax 9 Plus (40 GB, ATA-133).
• Video Cards: XFX GeForce 6200 TC 64 MB 64-bit, Leadtek GeForce 6200 128 MB 128-bit and XFX GeForce 7800 GTX.
• Video resolution: 1024x768x32@85Hz.
• Power Supply: OCZ ModStream 520 W.

Software Configuration

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

Driver Versions

• ATI IGP driver version: Catalyst 6.6
• nVidia video driver version: 84.21
• Audio driver version: Realtek A3.86.

Used Software

• SYSmark2004 – Patch 2
• PCMark05 Professional 1.1.0
• 3DMark 2001 SE 3.3.0
• 3DMark03 3.6.0
• 3DMark05 1.2.0
• Quake III Arena 1.32
• Quake 4 1.2

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.