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Modded Push-Pull heatsink? Your Thoughts?

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May 1, 2013 1:18:43 AM

After researching and trying to find myself a good heatsink to cool off my overclocked CPU(AMD A6-5400k) @ 4.4Ghz with package(CPU, not cores) temp @ 100c with stock cooler. I thought about getting a water cooler but it's not in my budget to get even the cheapest one. So there I was looking for an air type and found dual fans aka push-pull and saw that they make the best cooling option since the resistance from the push slows air down and pull sucks out the rest.

Anyway, I thought of the idea of push-push when I first saw a push-pull and searched for one and saw that they don't exist but read forums on how the whole thing works. So if there was a push-push, they would just crash into each other and not do much at all but the logic is that if there were 2 fans cooling down the heatsink seperatly(2 heatsinks, 1 fan on each), it would be twice as much better than a single fan cooling the whole thing.

Here is where the custom Push-Push heatsink came to mind. As much as it's not exactly a push-push anymore after the modification, it involves the direction of both fans facing each other.
----------------------------------- The Idea ----------------------------------

1. Get a heatsink that's quite large(around 160mm wide or so) and as much fins as possible with my budget. The space, weight, and how I'm gonna get it isn't a problem.

2. Add something to split them in the middle(not cut the heatsink in half) so if a fan were to push air in it, it would end up cooling it and pushing out to the side.

3. If you haven't figured it out yet, next is to put two fans in the push-push position but the middle would have them separated and there would be no force against each other but rather blowing out to the side and cooling each side

Simple as that! But of course, the fans are gonna be right by the copper tubes/wires since they bring the heat source(when I mention heat source, I mean the copper bringing the heat), this way the fan eliminates the heat as soon as it reaches the aluminum. You can see how it's better than one fan doing the work of two heat sources or even one source. The push-pull as well as there are 2 different models as far as i'm concerned and one taking out heat from one heat source and the other model having 2 heat sources and not the best efficient dual cooling. I'll post a picture about my idea so you'll know what I'm trying to pull here.

Tell me what you think, should I go for it? I hope this wasn't for nothing because I've been searching for something like this and nothing was found.

--> Pic in new tab <--
a b K Overclocking
a c 129 à CPUs
May 1, 2013 6:44:45 AM

That's won't work. All that will do is make the fins near the splitter be almost always hot. So then it gets spread evenly to all fins and your heatsink is not really getting cooled as efficiently because the heatsink wants to distribute the heat, yet your fans won't let it.

That also limits the direction that the heatsink will face. For one, you'll almost have to position your heatsink with the fans facing vertically instead of horizontally. Why? Because if the fans were facing horizontally and your push/push configuration is pushing air out to either side of the heatsink, the hot air that's being pushed back down to the case will just rise back up. That's not only re-heating your heatsink, but it'll get trapped because the hot air can't rise back up easily through the heatsink with air going away from the heatsink. So it'll be bottled up. But if you place your heatsink with the fans facing vertically, then push/push doesn't work well. For one, your top fans should always be exhaust fans. So then your top heatsink fan is pulling against your top exhaust fan because the top fans wants to move air out, yet your top heatsink fan wants to pull air in.

So yeah ....
a c 88 K Overclocking
a c 117 à CPUs
May 1, 2013 7:03:06 AM

I'll not be as harsh as Ksham - I will point out that HSF manufacturers have full time engineers designing their heatsinks so modification of an existing heatsink will likely not yeild any improvements. Your design idea is unconventional and I am unaware of any advantages to it (but that doesn't mean it wouldn't have any) but I think would be best to talk to a few machinists familiar with precious metals since I would suggest having it custom built from scratch - you could have it made of copper and silver for maximum heat transfer going that route
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a b K Overclocking
a c 129 à CPUs
May 1, 2013 7:31:41 AM

OP, so sorry about that. I didn't meant for it to be offensive. I hope my edited version is better.
May 1, 2013 12:19:36 PM

Reply to ksham:

Thanks for ruining my life! Just kidding, you just saved me $40. I thought it would've worked out well but it looks like I'll at least have to have case fans sucking out air directly from the heat dispersion. Maybe I should have the fins separate from each other and make it like a water cooler where as the fans have a tube that sucks air from outside the case and blows it out. I'll have to experiment once I start working again and have money.
May 1, 2013 12:27:04 PM

Reply to C12Friedman:

Right so what I learned from ksham, it looks like I really will need to start from scratch or just find something that will be easy enough to mod it as if I made it myself. But my idea was more based on 2 separate fans and heatsinks hence the splitter. What I see made with the manufacturers is hot air sucked into the next fan and then get blown out. Well, what do I know, I'm just getting started with heatsinks. Thanks for replying
a b K Overclocking
a c 129 à CPUs
May 1, 2013 12:55:57 PM

Why not just buy something that has what you need? Like the Phanteks PH-TC14PE or Noctua NH-D14? Both have two separate heatsinks and two fans.
May 1, 2013 7:09:34 PM

That's actually something I don't want to get just for the fact that it sucks in hot/warm air from the first heatsink and gives it to the next. I found the cooler I'll get for now anyway. I'll do mods sometime later and experiment ;) 
a b K Overclocking
a c 129 à CPUs
May 1, 2013 7:12:23 PM

MZarko said:
That's actually something I don't want to get just for the fact that it sucks in hot/warm air from the first heatsink and gives it to the next. I found the cooler I'll get for now anyway. I'll do mods sometime later and experiment ;) 

The point was to provide a stronger constant air current through the heatsinks, not wait for it to heat up and then start blowing air through them.
May 1, 2013 8:39:19 PM

And that just gave me the idea to just add a 3rd fan to the process. Man! I'm on a roll! I might just do that, just maybe.
a b K Overclocking
a c 129 à CPUs
May 1, 2013 9:07:50 PM

Adding more fans don't always improve performance. ;)  I would be interested to see some test results when you get around to them.
May 1, 2013 9:18:32 PM

I will try to post some results of future heatsinks and their setups. Right now I have a stock amd heatsink with no copper and thick fins. I just took a spare fan from an old intel cpu and plonked it right on top. Now my temperatures are 10-15c cooler. =)
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