The Vdamper doesn't work on the Standard P5K, it will need a pencil mod.
Have you done this yourself? Got any info or a link? Is it easy/safe to do?
Looks like you have hit the magic 3.6ghz, hoping to make 400x9 myself. Know the board is capable of 375fsb at stock volts and the temps are reasonable, just need to sort this vdroop out and have a serious play