Are cpu fans supposed to blow into the cpu heatsink,or out of itRon

Fans in the rear of the case should blow out.Fans in front and the side should blow air in.Cheers,- jahman.

Fans in the rear of the case should blow out.Fans in front and the side should blow air in.Cheers,- jahman.

Thanks for the info,but I was asking about the fan on the cpu heatsinkRon

Apologies for mis-reading your post.The answer would depend on the shape and position of your CPU heat sink, and (especially) the manufacturer's recommendation.My CPU fan sucks air out of the Thermaltake-120 heat sink and blows it directly towards the rear case dual exhaust fans. Fresh air enters the case from the front.HTH,Cheers,- jahman.

What

My cooler is the vertical tower type. I would have installed the fan to blow into the cooler, but the space there is already taken by the RAM cooling fans, so that was a no-go, while blowing into the cooler from the other side would have gone gainst the general front-to back case airflow direction.Cheers,- jahman.

My cooler is the vertical tower type. I would have installed the fan to blow into the cooler, but the space there is already taken by the RAM cooling fans, so that was a no-go, while blowing into the cooler from the other side would have gone gainst the general front-to back case airflow direction.Cheers,- jahman.

Thanks for the replies every one.I had consideable problems withj this new computer,but on reflection, I seem to recall the fan was blowing into the heatsink.It seems to be very active and noisy at the moment,I may replace it with one of better quality,and also add an additional 120 mm fan to blow air in from the front,before I close up the caseCheersRon

If you find your heatsink's fan to be loud, it may just be a high RPM fan, or your heatsink might not be attached firmly. You could always remove the heatsink and check the thermal paste for proper contact. To do this you would look at the bottom of the heatsink as well as the top of the CPU's integrated heat spreader and verify that there is thermal paste on both. Also, too much thermal paste can actually inhibit heat dissipation. If your thermal paste is spread on thick, there's too much.

I'm no airflow expert but I gleaned from various hardware forums that the best way is to PUSH air onto/through a heatsink. Based on these forums and my own experience pulling air is just not as efficient as pushing it. A PUSH/PULL combination can be great though.

My cooler is the vertical tower type. I would have installed the fan to blow into the cooler, but the space there is already taken by the RAM cooling fans, so that was a no-go, while blowing into the cooler from the other side would have gone gainst the general front-to back case airflow direction.Cheers,- jahman.

Do you really need RAM cooling fans? I'm overclocking to 4GHz, was 4.2, I have found no need for RAM cooling fans at all. Not with a reasonably efficient enclosure cooling anyway.I use a Noctua NH-D14, it's a huge cooler. So huge that dominator's with tall heat sinks don't fit. The way around this is to either unscrew the top fins from the Dominator in the way, [it makes no appreciable difference to cooling] or to raise the rear fan up slightly. Blowing into the heat sink fins is generally recomended by the cooler manufacturers. In the case of the Noctua it does both, it has a 120 fan and a 140 in push pull.