I'll be testing the block utilizing the Hydor L30, which circulates 320Gph @ 0.0 Head ft., 214Gph @ 3.3 Head ft., and 79.4Gph @ 5.77 Head ft. Initial system temp's were measured using the number-1 accelerator nozzle. The block was tested installed in a multiple block system to represent real-world performance demands. The L30's outlet fed a Black Ice Extreme radiator cooled with 2x120mm/90CFM Sunon in push/pull configuration. The radiator's outlet then feeds the inlet of the Danger Den Z-Chipset block for the Intel 865/875 NB.

Below is a close up of the Z-chipset's single, wide channel, conducive to free-flow. Almost as wide as the hose diameter itself, the channel width is designed to have a negligible impact on pressure





Per the accuracy of the Pentium-4, and Asus P4C800E-Deluxe thermistor's as interpreted by Asus BIOS, Asus Probe, and CPUCool Ver. 7.2.8. I've attained temperatures as low as -1.0°C/30.2°F. My PC is located between two windows in the corner of the room, which I leave open a minimum 15-cm's. New England temperatures since the latter half of December 03, have been as low as -23.89C/-11F (excluding wind-chill) the mean being -6.67C/20F.

My case is the TTGI USA TT-201T3, reviewed here. The TT-201T3 is an aluminium alloy case, featuring 5x80-mm Super Flower fans, including a top LED 80-mm exhaust fan. I removed the Side panel for easy access to the H20 hardware, and primarily due to it's location on the floor having a drastic reduction on operating temperature. Opening the windows drops ambient case temps as low as 5.0°C/41°F as confirmed by MBM-5, Asus Probe, CPUCool, and the BIOS;





The temps above represent the outdoor temp last evening which was -10C/14.F. The H20 hardware is placed on the floor outside of the case, between the open windows. I've included a picture of my system to better convey it's placement in reference to the cooling source (which presently happens to be the outdoor air). This is extreme cooling;





To date I've haven’t seen a single review where the number-5 nozzle was tested, and this surprises me given the nozzle's dispersion? It should be interesting to see the difference between the included number-1 and number-5 nozzles. Unfortunately I don't have a Compu-nurse for this test, however; we can still obtain accurate data. Although the motherboard thermistor can be inaccurate compared to real-world temps, were not measuring real-world temps. We’re measuring the ability of the RBX to remove heat from a CPU by virtue of its accelerator nozzles. As long as all parameters remain constant especially the motherboard thermistor reading, the nozzles become the only variables. It's the difference between nozzle performances we seek to measure. In statistical analysis were employing the ANOVA or analysis of variance methodology. The model is as follows; numeric <= nominal (read: <= as affected by). In other words we have a numeric value, CPU diode temp, and a nominal value the changing nozzles (CPU thermistor temp). These first screen shots show the nozzles which Danger Den includes with the RBX;




On to the results ->