the heatsink looks like not to transports enough power from the chips. What are the stats? And what is the advantage against CPU cooler which is replaced by a simple all-aliminium heat sink?
Indeed I found good air flow cooling solutions here: http://www.kuehlkoerper.de/kammprofile-40-mm-190-mm/
My favorites are solutions with < 0,1 K/W at 10 cm length. This gives a max. of 25 K at 250 W :-)
Your heatsink looks like more a 0,5 - 1 K/W cooling solution, isn't it? So every newer cpu cooler could be better than yours?
Cheers...
Pierre
CPU cooler is not big enough. And it is made for cooling one point not 16... So you need a coper plate...