Let's revive this thread to add the second part

Part 2:

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Test System
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Motherboard: Asus Striker Extreme ( 680i ) & Asus P5W DH Deluxe ( 975X )
CPU: Intel Core 2 Duo Extreme X6800 ( @ 3.66GHz / 333MHz x 11 )
RAM: Corsair Dominator 9136C5D ( TWIN2X2048-9136C5D )
VGA: Twintech GeForce 8800GTX
HDD: Maxtor MaXLine III 300GB

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Configurations
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FSB: 333MHz ( QDR-1333 )
DRAM/FSB: 1:1
RAM Mode: Linked
RAM Sync: Synchronized
RAM Timings: 3-3-3-4

HyperPath 3 - GPUex - LinkBoost: Disabled
Command Rate: 680i = 1T , 975X = 2T
BIOS Versions: Striker1002 - P5W1601
OS:Windows XP Service Pack 2
Drivers:Intel Chipset Software Installation Utility v8,1,1,1010 - nVIDIA nFORCE v9.53 - nVIDIA ForceWare v97.94

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The results
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Hexus PiFast:
680i = 26.47s
975X = 25.92s

SuperPi 8M:
680i = 181.563s
975X = 179.422s

Everest Ultimate v400:
680i = Memory Read: 9511MB/s - Memory Latency: 52.8ns
975X = Memory Read: 8554MB/s - Memory Latency: 50.0ns

WinRAR v3,70 Beta 5 Benchmark:
680i = 1599kb/s
975X = 1710kb/s

3D Mark2001SE:
680i = 60824
975X = 61155

AquaMark 3:
680i = 190977
975X = 193073

x3:Reunion Benchmark:
680i = 85.328fps average
975X = 85.731fps average

Windows Media Encoder 9 - HD ( 5MBPS ) Video Encoding Test:
680i = 8min 12s
975X = 8min 2s