I tested the Asus K8N4-E Deluxe some days ago (BIOS 1003 and 1004). VDimm up to 3 V, but the VCore setting wasn't working. Neither the BIOS hardware monitor nor tools like CPU-Z and Everest will show any VCore changes when I set it to a higher value. The north bridge cooler is a little bit noisy, but you can change it without problems because it's above the PEG slot.