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Would anyone know how to attach an additional fan over the heat sink?

post #1 of 6
Thread Starter 
I own a noctua c12p se14 which only has 1 large fan to attach over the heat sink.

http://www.noctua.at/main.php?show=p...s_id=35&lng=en


It's obviously not the best heat sink out there.

I have decided to improvise. I have a small 9mm delta fan i think that i used to attached at the back of the casing. I find that it's useless attached at the back but so i have decided to attach it next to the heat sink so now my heat sink has 2 fans blowing at it. The problem is this delta fan isn't facing the heat sink directly. It's blowing at the side.

Firstly my heat sink doesn't stand up but it's downwards facing with the giant fan attached on top of it. You can see it from the link. I attached my small delta fan by the side using those metal wires that attach the huge fan to the heat sink. i'm kind of clueless how to put the fan below the heat sink just above the gpu so it can blow directly unto the heat sink.

What could i do to achieve that?
post #2 of 6
You can use rubber push-pin type fan holders to attach the top fan to the bottom. In the past I used a small screw driver, and fan screws to mount the top fan to the bottom one. It's easy since the springs for the C12P fit on the bottom mounting ears.

Conversely, you can ditch the stock fan (if you're using it), and slap on a 38mm thick, high flow fan, which work just as well as two 23mm fans for the most part. I did that with mine, using an NMB 130 CFM PWM based fan, and it was better than two fans.

Keep in mind the low fin density, and thick fins require more airflow and less for static pressure. 2x25mm fans will have better static pressure than 1x38mm thick (way better than 1x25mm), but you can usually find very high flow 120mm fans. From what I can tell, after ~130 CFM, the heatsink performance plateaus, and the performance is very ambient dependent.

Check out Newegg, Amazon, or even Ebay. Also, if you're going for a high flow fan, be sure your board can handle it, or get power straight from the PSU.

You wouldn't want to put a fan blowing up from the video card onto the CPU heatsink...hot air. Plus, it would disrupt the downward airflow of the CPU fan. Piggybacking is the better choice.
Edited by UnexplodedCow - 12/21/10 at 1:49pm
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post #3 of 6
What CPU are you cooling with that for it to not be enough? Anyway, you say the new fan is 9mm? How big is the original? I did the same with my CPU a few times on diff systems, but my fans were always the same size
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post #4 of 6
Small Nb fans might attach to the sides using cable ties. More trouble than what it's worth though.
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post #5 of 6
Thread Starter 
thanks unexploded cow. The problem is my heat sink isn't one of those that are able to have 2 fans attached to it. It's facing downwards. From the link it only has one broad side which the giant fan sits directly on top. The top end coolers have 2 sides which allow 2 fans of equal sizes to be attached.

I actually am unable to picture how u attached them together. Guess i need a picture.

Perhaps i'll also post a picture of how my setup looks like and how i intend to change the position of the fan if you're unable to picture what i mean.

Sadly i'll need to do it later cos i don't have a digi cam with me.
post #6 of 6
Thread Starter 
Quote:
Originally Posted by ronnin426850 View Post
What CPU are you cooling with that for it to not be enough? Anyway, you say the new fan is 9mm? How big is the original? I did the same with my CPU a few times on diff systems, but my fans were always the same size


I'm cooling a c2d e8400 which has pretty high voltages on it. I'm running my e8400 at 4.18ghz with rams at 1118mhz 8 GBs ram total all 4 ram slots taken up. Using a DFI DK LP x48t2rs mobo. Added lots of voltage to it. NB is like i think +1.5V cpu vtt pretty high too.


I also live in a highly humid country located near the equator. It's still very hot even now at night. Air conditioning is required cos it's just so hot.


Anyway more info about my heat sink.

http://www.noctua.at/main.php?show=p...s_id=35&lng=en

From the link the fan is a 140mm premium fan. You can see from the picture the there's only enough surface area on the heat sink to attach 1 fan.

This additional fan i'm talking about is a small 8mm or 9mm delta fan that i bought to fix at the back of the casing. I think it's not really useful attaching it at the back hence i want to attach it below the heat sink above my gfx card.

I hope you can picture how my heat sink will look like when it's fitted inside a casing. The large part of its surface area is covered by the 140mm fan. My delta 9mm fan is a pretty small fan and the only area of the heat sink that it can blow directly unto it at the side area.


Would you need a picture to aid you?
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