has anyone tried mounting two fans on a heat sink. I got my self a retail 2600 xp and it came with a fan and heat sink. Im using the heat sink and a retail Xeon fan to cool my old 1000 Mhz PIII the fan runs @ 5600 RPM. But I still have the retail XP fan, and the old cooler master fan that was cooling the P3 before. I was just curios as to what would happen if I mounted all of them to the amd heat sink with a long enough screw.
I have been thinking about that too, would they have to be spinning in unison or slightly off each other for it to work?
If you mean mounting one ontop of the other then I believe that the extra blades will cause a greater reduction in air-flow and you cpu is likley to heat up further. Really the best thing to do is give it a go see how you get on but I would assume you are likley to encounter the above.
I didnt think the extra blades would prevent air flow. But its something to concider. Overclocking the proccessor would heat it up a bit. So I'll give it a shot. Crim tell me your results
Have seen this done. 3 x 60mm fans. The only way that you can get any extra CFM is have them spinning in opposite directions, to "focus" the flow (like the idea of the delta focus-flow fans). -cLoWn
{twig] its not really worth the effort, take for example 3 identical fans all with the abiliy to push lets say 50cfm. By stacking 3 fans on top of one another this doesnt magically mean that the combined effort is going to be 150cfm. You might find that the actual output is slightly larger than than the original 50cfm this being due to the fact that the secone and third fan are already recieving a moving airflow so can in theory spn faster BUT the initial fan still has to accelerate the air mass so in all probabiliy it is likely limeted to the first fan. This problem would be compounded by the fact u are directly stacking the fans against each oher. This is one of the reasons that duel fan PSU's are over rated, they're seen as standard now, but in-line fans really do do little to complement each other performance wise (I only noticed a 1C increase by removing the second fan from my q-tec suppply). any way thats my 2 cents. Itchy
do you actually mean ontop of each other or one fan per side?? as ive seen a few like that, bot sure of the performance though.
I didnt say there would be a huge CFM gain, if any. All i am saying is that i saw it done with 3 x 60mm, and they had them spinning in opposite directions in an attempt to "focus" the flow of air, similar to the preciple that the delta focus flow fans work on. -cLoWn
i was considering changing this on my Zalman, the way i see is the 92mm fan blowing down onto the heatsink is putting air only to the ends of the blade in great quantity, and the lower blades are not getting any flow (or very little in comparison). I thought of mounting 2 80mm fans at about 120degrees from each other on each bank of blades, so that the fans would push air directly at the base of the heatsink, rather that at the ends of the blades and rely on redirection of air. Didnt get around to doing it, yet another noe of those things which was shelved in favour of Plain Lazy. Might do it now that i have a hole cutter though as the holes for the fans was always the biggest problem, the rest of the bracket is easy.
