Intake or exhaust for the heatsink

[Relion]

What the title says...whats better to keep everything cool? Currently I have fan blowing down to the processor (and memory)...is this the best choice or exhausting will get everything cooler? Just got this doubt reading from someone's post...

 

[mindwreck]

Its usually better to blow onto the heatsink. Pretty much all of heatsink now work that way, but there have been a few (alpha PAls) where sucking air from the heatsink was better

 

[Unkno]

there shouldn't really be a difference but blowing on would usually perform a BIT better. On another note, blowing across the heatsink is pretty good to, it blows straight to the exhaust fan (Zalman CNPS9500)

 

[Relion]

Thanks....did testing and blowing in makes a dif of 3 degrees at load....winner is blow into