Well, you can make an assumption based on the test results that JoeC published at Overclockers while reviewing another of 1A's block, the HV3 with a Eheim 1048.

Assuming the radiator assembly has a C/W of around 0.03, which would seem to be a reasonable estimate given the fannage and radiator size, we'd be talking about a block C/W of around 0.13, or about on par with the better USA blocks. Uncertain as to what the actual flow rate is though... Joe would need to test the block separately like he does the other blocks, and included the block's pressure drop, so we can draw a better indication of C/W coupled with pressure drop and flow.

The other rather stark difference is JoeC's use of 30kgs of mounting pressure, as opposed to his more standard 6.8kgs of mounting pressure with the other blocks he tests.

Why would he do that?

That seems very irresponsible to use that mounting force, what with the maximum pressure of 11KG suggested by AMD and a lower force used with the others...

Indeed. 30kgs (66lbs) would be the recommended pressure for IHS CPU's. Can get quite a substantial performance boost by increasing the clamping pressure, especially in comparison to 6.8kgs (15lbs) on bare-die CPU's with tubing hanging off the block.

Apples to oranges comparisons again, and worse, comparisons using pressures that exceed the maximum recommended bare-die pressures by almost 3x, and standard pressures by over 4x.

As Bill once said (about JoeC's practices), BTSOOM.

JoeC is a friend, he helped me
but his thinking has become a mystery to me
yesterday (?) he had a front page blurb on a product not (yet ?) reviewed
- but sold by an advertiser
so sad

hi ho

Oh, his heart is definitely in the right place. As you say, his reasoning/thinking is a mystery at times.