Can anyone tell me if this custom built peltier unit will work?

[Lowbrassman]

I am thinking of buying a 35 watt, 12 volt, 4 amp peltier cooler about the size of a socket 7 processor. I have a massive heatsink that I bought from computergate (3x3x1.5 inches), and I am going to put in a big 12 volt fan on top of it.
I doing this to decrease the temperature of my K63 400 so I can overclock it. I only want some input from some tech's out there to hear what they think of it.
The whole bundle will be about $32.
Thank you if you comment on this...

 

[Brett]

35watt peltier wont lower the temp much, thats a fairly small one...

 

[BuddyHolly]

35w will be hardly sufficent to move the heat from your amd to the heatsink, much less cool it. Go with at least a 55w.

 

[Lowbrassman]

Have anyone used or seen the comparison between a 35w and a 55w peltier unit? The amount of amps also makes a big difference. The 35w has 4 amps, and the 55w probably uses 8 amps. All I know is that the external temperature on the cool side is > = -30 C.
I only want to try to overclock the k63 400 to 450 or 500. I know that I will be able to reach 450 but 500 is questionable.

Thanks for the advice...

 

[MagnusPAH]

35W is too small. You have to remember that you can not really directly compare a 35W to a 55W. With Peltiers, any heat that can not be handled by a peltier will mean that the peltier will become a heater instead of a cooler. Also keep in mind that 35W is rated when your Powersupply is supplying the peltier 16V. However, since it only supports 12V, this will mean that the peltier will only dissipate about 60-61% of the rated heat wattage (based on some calculation a TEC site did). THe means that the 35W peltier is really only dissipating about 21.4W worht of heat. So if your computer puts out 22W of heat, then the peltier will be unable to get rid of that heat, causing the hot side to get too hot that it will start pumping the heat back to the cold side, creating a nice oven for your chip. Now with a 55W, will be dissipating about 34W of heat which will be about about enough. I don't know how much the K63 400 dissipates but I would think it should be at least 30W worth of heat.
So back to your question: 35W will not do it.