I am upgrading to a p4 2.4B, and i want a heatsink/fan cpu cooler that will let me overclock to 3.0 ghz. Water cooling is out of the question, and im going for the Swiftech mcx 4000 heatsink. I need help with the fan though. It's between the THermaltake Smartfan 2 that pushes 75cfm and a TMD fan. Which one is better? And does anyone have any suggestions?
P.S. I actually have a thermaltake smart fan and have compared it to a delta 4900rpm screamer...
The thermaltake DOES NOT put out 75cfm of air. Either that or the Delta puts out WAAAAAY more than 68.5cfm.
I've got the new Vantec Aeroflow with the TMD fan on it, and I'm pretty stisfied with it (idle 33C, load 39C). Its probably the quietest fan I've got, and compared to the smartfan the only thing I'd be questioning is how much cfm you want, because the TMD fan delivers ~34cfm - not much for overclocking.. I mean, I haven't tried the SmartFan II but I've tried the SmartFan I and I'm not satisfied with its performance at all.. If you're looking for the best, go with a Vantec Tornado, puts out about 84cfm (80mm) and about 104cfm (92mm). Then add on a Thermalright SLK 800, and you'll be fine... Otherwise, Swiftech is now offering some promising looking pelletier/air cooling HSF combos, but those still need additional modding before I would use it.
You're lucky that I'm not in a bad mood and don't mind explaining this a third time.
Now lets say you have a CPU emmiting 75W of heat... then the peltier will move the heat to the hot side and add another 75W. So you will get 150W heat to cope with on the heat side... which will create an enormous amount of heat in your case that needs to get out of there.
I couldn't find the heatexchange coefficient for the MCX462 but I guess it is somewhere around 0.28C/W (that is the coefficient for the Alpha PAL8045). So whit a 150W heat output you will get a HSF temp of 64C with an 22C ambient.
Now the deltaT (temp difference between the hot and cold side) of the peltier is 70C at most (that means with no heat input at the cold side)... with 75W heat input it will be around the 30C (not for sure as I don't know the peltier specs so it could be lower). So you will get a CPU temp of 34C.
Sounds good but now lets calculate what you would get without peltier: 75*0.28+22=43C.
So it all that power sucking (75W), the condensation that occours at idle CPU, the enormous heat inside your case and the enormous amount of noise created by all fans really worth it?
IMO not: watercooling is the only good option for peltiers.
My PC eats so much money that I'm in 'desperate' need of it to buy PC3500 RAM, help Svol with his OC project!
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