Wanted: Constant heat source I'm looking for a constant heat source 'cause I want to test some memory heatsinks (alpha, thermaltake and some Brico stuff). Or do u guys know another way of testing these things? (I have a copper colplate with a thermal sensor in it and I want to put he HS on one side and the heatsource on the other and the lowest T° should show which HS is the best.) I just want an idea of what to use I don't want to buy it here so don't move this to mad bargains |
mini-heat cookplate? ones you can take on a holiday trip.. should do fine no? |
that's to big, and I think it gives of to much heat for those little HS's |
a small thealight perhaps? |
could try that but I'm looking for something electrical so you really have a constant source. (T-light changes when there's more wind & stuff) |
cookplate has different settings, I'm sure lowest setting comes very close to processor heat output :) (check XP egg baking :) ) |
I saw on GoT that someone made a heatsource especially for this purpose, with adjustable watts i think. Didn't look to hard to make and not expensive Unfortunately I don't remember the topicname, search would help in this case ;) |
hehe funny :) it's plain simple. 1st how many watts of heat do you want to stun the heatsink with? lets say 10 watt wich is much for some mem. what we need: a 10 watt resistor, a psu or 12v source lets calculate the resistance we need. P=U*I (power = voltage * Current ) now we put in the numbers 10=12*I => I = 10/12 or 0,833333 Amp now that we have found I we can use Ohm's law R= U/I R = 12/0,83 => 14,5 Ohm now head over to your local electronics shop and ask for a 10 watt resistor with nearest value to 14,5 ohm apply some thermal grease and you can start measuring. === another how-to: calculating thermal resistance of a heatsink example: 5k/w wich means temps rise 5 Kelvin per watt heat applied. a temp rise is called : Delta T a rise of 1 Kelvin = a rise of 1 °c to keep it simple now with above 10 watt heater, you can measure temps lets say ambient temp = 20°c heatsink temp with 10watts heat applied = 40°c so delta T = 40-20 = 20°C now we can calculate delta T / wattage = thermal resistance => 20/10 => 2°C/watt the lower this number the better hope you can understand it :D Will make website soon with pics'n stuff to brighten things up :P |
That's what I needed thx |
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