[zCereal]

lemme do a little math here

to test all optimal set-ups we would have to have about let's say 4 different pumps to respressent certain flow rates

let's say 12 rads to test (including a heatercore or two)

and then you'd need to test the 19 waterblocks on each set-up

which means 912 different combinations

testing each 3 times for elimating sources of error like mounting

that is 2736 tests

now take that and let's say 1 hour per test to test load temps and take measurements and put on the block

that's 2736 hours of testing or 114 days of 24/7 testing of waterblocks

unfeasible

so leave it down to 1 variable
then you gotta run 19 tests at 3 times each

which mean alot less work and results that may not reflect all possible results but does give a very good indication of which blocks are the best performers