ok, the testing of the block is in progress...
i'm using an athlon xp-m 2500 at 2700 Mhz @ 1.95v (1.9 real) on an abit nf7-s v2
my pump is a viaAqua 1300. the thermal paste i use is artic silver 5 (not yet settled).
i read the water temp with a cheap aquarium thermometer (accuracy is probably ~+/- 1 degre). for the cpu temp i use the w83627hf:2 sensor with mbprobe.
to summarize nothing very sensitive or accurate....
after running burnK7 for 1 hour my delta temp is 15 degres
the only block i have to compare with is that
this block is far from being a good copy of cathar's cascade (cup repartition is not perfectly regular, rounded bottom of the cups, too much space between the cups....), and i was reading a delta temp of 17 degres with the test conditions described above (but with settled AS5).
due to the "high quality" of my test bed

i don't know if the difference is significative, but i like it....
another point is that if the block, i'm comparing with is not as well realized as a cascade, the achievement of this one is also far from being perfect (easily seen on the first post) and could be improved using a drill press (to consider the use of advanced tools...

)