Nyeah, mine will do the multiple post code when I am trying high settings that it doesn't seam to like, I am still experimenting with my settings but @ 4.2 200x21 it does not do it at all.

I finally got my Mega Shadow to replace my CNPS 9900ALED and Holy what an improvement!!! The idle temps are better by about 4 degree's c on the Zalman at idle but under load the Mega Shadow stomped all over it. Mounted vertical (fans blowing out of the back) I dropped about 9c from the 9900 and mounted horizontal (fans blowing up) I dropped about 12c from the 9900 under load

I do want to add that mounting the Mega Shadow horizontal the fins do touch the tall ram sinks of my Hyper X in the second slot. It does fit but pushes against the stick a bit but it does not appear to hinder the performance. So mounting this heatsink horizontal using the first slot with tall ram coolers will not be possible.