Martin's Flow Rate Estimator
Version 3.1 out!   7-23-08
Martin's Radiator Estimator
Version 0.3 out!   7-28-08

CPU Block Test Results

Aqua Computers Double Impact
Danger Den MC-TDX
Danger Den TDX
D-Tek Fuzion V2
D-Tek Fuzion Nozzle Kit, Fuzion stcok + 6 nozzle configurations.
OCZ Hydroflow
Swiftech Apogee Drive
Swiftech Apogee GT
Swiftech Apogee GTZ
Thermalright XWB-01
XSPC Edge Acrylic CPU
XSPC X20 Delta CPU V2

GPU Block Test Results

Danger Den 8800GTX
Danger Den IONE 8800GT
8800GTS (G92)
Swiftech MCW60  vs
D-Tek Fuzion GFX 
XSPC Razor 3870

Chipset or Other Pressure Drop Test Results

Danger Den MPC-Universal/680i
Danger Den Fittings
DigiFlow 8000T Flow Meter
Fittings, elbows & Ts
XSPC X2O Delta Chipset

Radiator Test Results

Testing Specifications
HWlabs 480GTX
The Feser Company X-Changer 120.3
The Feser Company X-Changer 480ER
Thermochill PA 120.3
Pontiac Bonneville Heatercore
Thermal Testing
Swiftech MCR220
Swiftech MCR320
XSPC RS120 Radiator


Rad Fan Orientation and TFC Shroud Testing
Fan Static Pressure Testing

Pump Test Results

AlphaCool AP1510 Pump
Danger Den CPX-PRO
Laing DDC3.1 Pump Top Shootout
Laing DDC3.2 Pump Top Shootout
Laing D5 vario (MCP 655) Pump
Iwaki RD-30
Swiftech Apogee Drive 350
XSPC Dual Bay Reservoir Pump

Misc. Testing

Coolaboratory Liquid Pro vs
Artic Silver 5

Discussion Boards

XtremeSystems LC Forum WC Forum

Favorite Links

Danger Den
Petra's Tech Shop
Sidewinder Computers
The Feser Company

Design Help

If you have a computer build setup question, please ask at the XS or OCnet discussion boards that I regularly visit. There are many professional system builders with much more experience that can better answer your setup questions.


Welcome to my website.  This site is dedicated to busting out the science behind liquid cooling, and becoming a resource for those willing to go to extremes and mix water and electricity.

News and Updates

Lab Toys Tools

I call them toys, because I have so much fun using them, but I've actually started to gather a few good tools for testing and fabricating my ideas.

For flow rate testing I finally landed on a King Instruments 0 - 5 GPM, 250mm scale 7520 series flowmeter.  This has been an extremely pleasant addition to my testing tools.  Prior to this, I was measuring flow rates using a graduate 4 gallon bucket and a stopwatch which is accurate, but very time consuming.  This flowmeter with the larger 250mm scale is supposed to be accurate within 2% of full scale and I have confirmed this with some bucket tests. The 0-5 GPM seems to be just the right range, although most water cooling will never see beyond  3GPM, it's nice to capture a few points up the the 5GPM range when possible.  

My next favorite tools (or was that toys?) are my Dwyer digital manometers. My first is a Dwyer Series 475 Mark III digital manometer. It measures pressure differential between two points from 0 - 200 inches of water at .5% of F.S. accuracy.  This is a great range for testing pressure drop on common water cooling products although it's a little short on the maximum when testing larger pumps.  I've also since acquired a second Dwyer for more heavy duty pressure testing. A Dwyer Digital Manometer Series 477 Mark V.  This is the same family/brand manometer, but rather than 0-200" of water pressure, it's capable of reading 0-553" or 0-20.00 PSI which is more than enough range for any water cooling pump even dual DDCs or Iwaki pumps.  I've since ran both manometers together side by side on a few tests and pleasantly suprised to see they are spot on calibrated the same. At 150" of water pressure, I get readings from both manometers within about 1" which is less than 1% so I'm very happy with the quality and accuracy of these Dwyer manometers.  A good digital manometer is an excellent tool for both pressure drop testing and pump tests.  The only thing better than two of them!..:)

I've also have a Samlex PSA-305 variable DC powersupply that is capable of producing 0 to 30 Volts at up to 5 amps and infinitely variable.  This is a must have for pump testing.  There are alot of pumps that can be run at voltages other than 12 volts, and a variable DC powersupply is the only way to explore those other areas and ensure testing is done at accurate voltages.  Typical pump testing I can very accurately tune and monitor the voltage of a pump to within about .03V.

I've also aquired an unbranded 3amp AC variable autotransformer  (Variac).  This will allow me similar flexibilty in a variable AC power supply which is particularly usefull for my future thermal testing.  My intent with the variac is to power aquarium heaters in my test reservoir to apply varied amounts of heat load to a radiator and better understand how it performs with different loads.  I can alos use it to power canister heaters for a CPU testing die I have plans for.


I have three, nothing terribly fancy but they do a reasonable job.  One I hook one in series to the pump for measuring current draw in amps, and the second is parallel to monitor voltage.  These meters are your basic types with current resolution to .01amps and voltage to .01V resolutions.  I also have one multimeter with sound level capabilities for very rough sound level measurements.

I call it my machine shop, but it just my garage, my haven to fabricate and make substance of my many ideas.  I have a CentralMachinery mill/lathe combo that does the job for most of my needs, it's really a fun tool and I've been slowly collecting the tooling I need for different projects.  I spent a good portion of my younger years working for my father in a machine shop, so fortunately I've had a fair amount of experience already to "get back on the bike" and machine again.  I also have a number of tools like a drill press, buffers, grinders, belt sanders, band saw, table saw, table router, miter saw ect. that I have collected over the years for home improvement projects. These all seem to come in handy for one thing or another in fabricating special parts or testing tools.  I've also tried to make a few waterblocks with my mill and did so successfully, but I can honestly tell you it takes WAY too much time to ever be worth your while unless you really need something custom and don't mind spending all day or all weekend machining on one block, it really takes way to much time to ever become profitable.  But regardless, it does provide me an invaluable tool to experiment with or fabricate that special "something" you just can't buy anywhere.  You can never have TOO many tools!!


I'm currently rebuilding my system, check out my worklog here....
Another side hobby of mine is photography.  I've been shooting digital SLR's ever since 2003 and have litterally taken tens of thousands of pictures learning how to use the tool.  I currently have a Canon 20D and have a good supply of prime lenses, filters, adapters, flashes, etc.  I also have a small lightbox for taking small product photos.  This is just another great tool in taking high quality photos.  You'll notice I'm a visual person and prefer to keep most of my testing narration short and consice with a heavy dose of pictures and charted results.  A pictures is worth a thousand words right?..:)

About Me and My Mission

I'm an engineer that likes to tinker, test, and more than anything...learn and understand.  When I started watercooling I was completely lost and confused trying to make sense of what and how things work.  Nearly a year later, I'm even more lost!! No not really, but I learn new things everyday and we're seeing great new watercooling products everyday.  My mission is to tinker, learn, and share my findings.  I take pride in helping other people learn and better understand our hobby.


This site is intended to be a collection of educational documents only.  The flow estimator spreadsheet and any other tools should be used for information and educational purposes only!   The owner and author is not responsible for accuracy of the information, I provide this information to you as-is, without any guarantees.  I do appreciate any and all feedback, a big part of why I do this is for my own learning experience, so if you see something you feel is in error, please let me know and I will immediately correct it.