gamemania

Testing Methodology
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Written by Administrator
Saturday, 07 February 2009 10:55

Heatsink testing methodology*

  • Each heatsink test consists of two parts, Real Test and Synthetic Test.
  • Real Testing is performed in a real system, while Synthetic is done using methods that simulate thermal loads.
  • Stable thermal loads are used in order to have accurate results, more specifically thermal load is produced by power resistors.
  • The thermal load wattage is 30,60,90,120,150,180,210 watts. This covers a really wide range of processors and also overclocked states at wattages of 180 and 210 watts.
  • Temp readings are taken from a sensor inside a copper plate that is the exact size of the processor tested in order to simulate the cpu with the best way.
  • For reading the temperature I am using a high sensitivity digital multimeter.
  • Thermal paste used in each test is Noctua NT-H1 because it has very quick break-in time.
  • The copper piece that simulates the processor is not perfectly sanded, because the actual processor heatspreaders are never mirror polished.This happens again to have as accurate results as possible.
  • Sound pressure levels are measured with a high sensitivity digital sound pressure meter, from 20cm away of the cooler inside a sound proof box to eliminate any external noise of echo.   
  • Also please be informed that the installation procedure of each cpu cooler is shown in a dummy board without an actual cpu, just to take the photos and show the procedure. 
*Testing methodology was different before,this one applies for reviews made after 5/5/2009.

 

Power supply testing methodology

  • Each psu test consists of two parts, Real Test(with a real system) and Synthetic Test(simulate loads).
  • For Synthetic testing of power supplies I am using a homemade tester that consists of multiple power resistors and amperometers.
  • This allows me to control with pin point accuracy the exact load at each rail
  • One more reason to test psu's with this method is that high power power supplies(800+ watts) are very difficult to be tested with a normal system.With the tester I am using I can achieve loads of up to 1800 watts.
  • Readings are taken with a high sensitivity digital multimeter, and if required a voltage drop diagram is made.
  • In order for a test to be considered successful the psu has to be able to perform it for 2 hours.
  • Noise levels are recorded from 10cm away from the back of the psu(air exhaust) 

 

Thermal paste testing methodology

 

  • For testing pastes, I use a 230w peltier in order to have a high thermal load and make the differences bigger and noticeable.(plz note that actual thermal load produced is ~180w because the rated 230w is with 15.6v and I am using 12v)
  • Room temp is at 24 dergees always
  • Coolermaster V8 with Nanoxia 12cm [email protected] is used
  • Temps are taken from a copper plate between peltier and cooler(simulating a cpu heatspreader)
  • Temps are taken with a digital IR thermometer for accuracy
  • Before every new paste everything is cleaned with alcohol
  • For every paste I do the break-in time as is specified by the manufacturer
  • Each reading is taken 5 times to ensure accuracy, if anything abnormal is noticed the test is done from the beginning.

 

 

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Last Updated on Wednesday, 16 December 2009 19:48
 

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