Did a quick search to find a similar topic, but one was not immediately apparent, so I thought I'd raise the question - should a fan blow air onto or suck air from the CPU?
I recently upgraded my CPU Cooler from the stock Intel P4 HSF to the Thermalright SI-120 fitted with a 120mm Panaflo fan. Currently I have a 120mm Thermaltake at the front sucking air in (at the bottom), another at the back top sucking air out, and an 80mm on the side blowing air over the CPU (which blows onto the new HSF). Works great overall, dropped temps by about (on average) 8-10°C.
So here lies the question (and I could try it, but I think it is an interesting topic) - should I have the side fan blowing onto the Panaflo, and that blowing onto the CPU; the side fan sucking out and the Panaflo blowing onto the CPU; or vice-versa on both those options?
Bearing in mind that the SI-120 has about 2-3cm between the CPU mounting plate and the heatsink fins (heat passed by 5 heat pipes). Does the Panaflo then blow the hot air from the fins onto the CPU mount?
Any suggestions/comments welcome......