Test Hardware:

ECS KN1 SLI Extreme / Asus A8V Deluxe
AMD 64 3500, Stock cooler
1Gb (2X512) TwinX Corsair 3200 DDR Ram
200GB Seagate 7200.8
Geforce 6600GT 128MB (81.85 drivers)

   Testing was done with a fresh install using Sisoft Sandra 2005, 3dmark 2005. I also created a custom timedemo in Quake 4 to use as a benchmark. The timedemo was loaded once (that score being discarded), then run 3 more times to make sure the scores were the same.

Cpu Testing:

 
Dhrystone

Whetstone

Integer X4 aEMMX/aSSE it/s

Floating-Point x4 iSSE2 it/s
 

   The differences between the Asus A8V Deluxe are virtually non-existent in both of these tests. The scores increase along the same percentage as the over clock. Nothing really unexpected here, as there would only really be a difference if there was a problem with either board.