If this design is two years old then I dont see the point in this thread.. the deisgn looks like itd be better than all the other commercial blocks from the same time (maze2 etc....?).
Ive just looked up in a book, but doesnt have thermal conductivity
but it says silver has 1/3'rd higher coefficient of heat transmission. Also Silver has about half the specific heat (heats up more per watt = more efficient heat transfer?). I assume both of these are good.
From heating up silver and copper I have noticed copper takes a a while for all the heat to spread throughout a peice of copper but in silver it is MUCH quicker.
I was fixing a leak in a small waterblock with a 30w soldering iron and copper was easyish to fix but the same shape peice of silver wouldnt, It was dissipating the heat too quick.
Im using 99.5% silver.
Cathar didnt you say your silver cascade gave temps around 2c lower? and a higher overclock? I would say that is more difference than the thermal conductivity values people keep quoting is equal to?