VRM Cooling with 40mm fans

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Jovan93

Jovan93

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May 18, 2014
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Would adding 2x40mm fans on heat sink of the VRM decrease temperatures, anyone has any experience with this kind of setup and how did it perform?
 
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Depending on the VRM and its location, yes it will decrease the temps greatly aslong as you have it properly install and set up. I used to use 40m fans on the north and south bridge of an xfx mobo i use to have, they decreased the temps by up to 10C, which was a huge difference for a little piece of metal and a fan.
 
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well these are the photos of my setup:

https://scontent-vie1-1.xx.fbcdn.net/hphotos-xpf1/v/t35.0-12/12197013_10205302260692057_151366101_o.jpg?oh=6c047becaeefb8c6f042996bc1c168e2&oe=5637732B

https://scontent-vie1-1.xx.fbcdn.net/hphotos-xtf1/v/t34.0-12/12182302_10205302259732033_422111771_n.jpg?oh=56f2ee2c53f14efb34ad0ae800a310d8&oe=563876DD

both fans up and one of the left are exhaust fans, i was thinking on placing 2 on top or one bottom of the VRM so it moves air bellow and above heat sink
 
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You can set it up to have the 40ms blowing towards/thru the vrm heatsink and one to pull the air at the other end so you get maximum airflow, just 1 on the bottom blowing towards your CPU would be fine aswell to get that heat off them. I do recommend getting some 40ms for that though. also maybe a fan 120m or 140m placed in the front to pull cool air in, that way you keep the case pressure pretty even and if you really wanted maximum airflow get a Rear Exhaust Fan to place below your GPU to pull the heat coming out of the GPU fans directly out of the case and out the back. There are prettier and better ones, you just have to look around.
 
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All you have to do is turn the rear exhaust around as an intake and it will blow directly on your VRs.

 
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Must be the time change, or leftovers from Halloween! :lol:

 
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Actually i did that, and it didn't perform that good. :) I'll try that what i meant to do, that is to place 1x40mm fan below VRM heat sink to blow under and above him towards the top where exhaust fans are. What bailojustin said, it's a pretty good idea. I will post to this thread what i did at the end with results, so others can know did it work. Thanks guys for ideas.
 
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I totally respect that you have enough sense to recognize the need to cool the M/Bs VRs after removing the stock air cooler!

Any air flow is 10 times better than no air flow when it comes to the longevity of the motherboard, you can always use nylon wire ties to put a fan wherever you need to. :)
 
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I have total sense for limits of my hardware, i know they are not the best and i can't expect 5.1GHz on M5A99FX PRO R2.0. I'm very happy with 4.8GHz and GTX 760, as for airflow i have some tough to place one more fan where the disk bay is, so it can blow air directly on CPU block and VRM from other way also. I have HAF912+ case and in the bottom one 200mm fan on direct 12V molex which pulls air pretty good, but i think that by adding one more fan in the driver bay i will feed that middle space with cool and fresh air which one 200mm bottom fan couldn't. Hope you could understand what i'm saying, English is not my native language and i tried my best. :)

http://nb91.lesconfigs.com/tests/noctua/ventilateurs/a4x10/a4x10_bundle_1.jpg

This is the fan that i'll buy.
 
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Sounds like a perfectly cooled PC case to me, and that fan will do great, especially a bottom 200m, as cold aair sinks, so it will draw cold air from the floor into your PC. also just a side tip, you can have a positive case pressure and a negative case pressure, positive means you have more air flowing in than out, this means worse cooling, but you also have less accumulation of dust, and the negative means you have air constantly being pulled in more then being pushed out, this results in dust buildup around the cracks and anywhere like ontop of the HHDs and SSDs but results in better cooling typically.
 
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I think that i have negative, because i clean my PC every two weeks maybe and it's pretty dusty. :) i don't let it to get really dusty, it's not hard for me to unplug all cords strip it and clean.
 
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So i got my fan and all other things with it and i must tell that im pretty disapointed with the VRM cooling result in the case, but i did something else:

https://scontent-vie1-1.xx.fbcdn.net/hphotos-xaf1/v/t34.0-12/12204851_10205334318733488_277936889_n.jpg?oh=802d4442ca7eda4f2b6183bee879804f&oe=563ED562

https://scontent-vie1-1.xx.fbcdn.net/hphotos-xtf1/v/t34.0-12/12200912_10205334296532933_1852154601_n.jpg?oh=4b897df55b181164af173ccfe8b71810&oe=563EAB0D

And it's working like a charm, it droped my socket and VRM temperatures by at least 5c!
 
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I cannot see the photos, What did you do? Just a tip you can unscrew the whole heatsink covering the VRM and clean it and where applicable put thermal paste to help the induction of heat. Alot of times with boards like thats its highly recommended to get the smaller fans as you did, but if your looking for a permanent solution one that will perform 3x as efficiently I recommend getting a flex Fan, you can ever get multiples, aim one at your NB and one at your South Bridge, Your motherboard was intended to have a air cooling cpu cooler, one that blows towards the cpu and the air flowing from the sides was ment to cool the vrms, but since there is no air flow right in the middle of the case its a dead spot where warm air collects. this type of fan aimed directly at them will drop your temps I would have to say at least 15c, considering its bringing much more airflow to your case the a few small 40m. and this will also ensure that it wont over heat in the future, and you can make it lok nice aswell, considering they are completely silent and even have 3 different settings for speed.
 
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Actually i wanted to disconnect coolers from the motherboard but i was little afraid cause i didn't do that ever. :) And i have a problem with the motherboards power connector, i can't disconnect him from the plug it's so tight that i'm afraid to pull it right off the motherboard with power cable. So in order to do that kind of thing i need to mess up again my cable management, disconnect all cables from PSU and motherboard, then with only motherboard's power cable handing on the motherboard it self, i can pull the motherboard from the case. It's really frustrating when i already did that like ten times, but i'll give it another go... Any tips how to disconnect the power cable from the motherboard cause it's really stuck in there? As for pictures i placed 40mm fan behind the motherboard to blow on socket and little on VRM.
 
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most have little latches hidden on them you have to grab these and squeeeze real tight, I use a rubber tipped flathead with a static brclet on when im working on computer and have to do that to multiples. sometimes you have to put in some elbow grease. believe me, I had over 70 lacerations on my hand from removing CPU heatsinks, its tought and hurts but you have to.
 
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I will try, but i think that i will not risk by trying anything funny with the motherboards power outlet, i'll just tear the whole thing again when i feel like doing it. :)

Is this a good way to place 40 mm fan?

https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-xta1/v/t1.0-9/12079621_718458638287277_5368765614487699958_n.jpg?oh=d5f83cc73cb2a6a7da4457fd10420e4b&oe=568C1E75&__gda__=1452231932_f1646470dd3550944df06487c2465228

This is how the case looks now:

https://lh4.googleusercontent.com/-h4x03s3WZew/VjITNPUQAtI/AAAAAAAAATk/h1hZr3zfX-c/w1538-h865-no/12190551_10205302257611980_1367736273_o.jpg

https://lh6.googleusercontent.com/-lrhaM0Bse0g/VjITNJMFsjI/AAAAAAAAATk/SQj4xNdmCZU/w1538-h865-no/12190149_10205302260292047_699882177_o.jpg

https://lh6.googleusercontent.com/-y8aiBPdMFdY/VjITNJjIw7I/AAAAAAAAATk/6B_1TxAk0dw/w487-h865-no/12182302_10205302259732033_422111771_n.jpg

https://lh4.googleusercontent.com/-m_GtRdb0vVg/VjITNPSAi8I/AAAAAAAAATk/zrsgS2Q0Zs0/w1538-h865-no/12197013_10205302260692057_151366101_o.jpg
 
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This in my opinion would be the best absolute setup for VRM cooling and you would have 0 issues ever again when it comes to temperature.

ec98e64444f329249be4cbbdc0fcb21f.jpg
 
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When i get some more money i'll try to do something like that. Until then i tried this and i'll test it now: https://scontent-vie1-1.xx.fbcdn.net/hphotos-xpf1/v/t34.0-12/12270096_10205373002100548_800113118_n.jpg?oh=1b275fedab473e649966ce6c36608c3d&oe=564A7E59

i used tape and super glue to stick it like that, sticky side of tape is on the fan and glue is on other non-sticky side of the tape, so i can easily remove the fan when i need to. As for the glue, just a little 99% alcohol and the glue will be removed. :)
 
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pretty cool stuff, as long as it works for you 😀 lol I just felt like drawing on a pc? idk haha
 
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you're idea ain't that bad at all, but i don't have the money right now to buy that fans. They are like 20$ each :)
 
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Well then to best utilize that one fan I would recommend actually getting hw monitor and finding out if your north bridge is hotter or your south. Then based on that observation place the fan facing towards the openings of the heatsink, the most heat dissipation comes from air passing thought the fin, since its more surface area then aimed at the side of the longer one. if your south bridge is the one thats hot which looks like it would be due to the air flow, I would place the fan aiming as drawn on the fins blowing through. you can even use a modern case fan and place it on the much larger northbridge, I even spent 15 mins drawing you the best possible diagram that I could for amazing airflow and cooling. Just be sure you have an intake fan on the front up top, or the front bottom, a side intake fan right in the middle or a little higher would be great aswell. take a look, the white arrows are the airflow, the black squares are fans. the one on the heatsink could be a 80mm 100mm 120mm whichever fits the length of the sink, and the other you can actually ad a 40mm, or do what you did with the northbridge and get 1 size according to the length of the heatsink. the white arrows are the airflow as i guess you have it setup in your case, you can see why your vram heatsinks are having issues because without these fans added, its a complete deadzone other then the air on the top of the case being pulled out and the exauhst, anything lower will heat up. and its always good to have a fan with a filter or no filter placed on the bottom of the case, make sure you have case stands.
This will pull the falling cold air outside the case up from the bottom where its the coldest and straight over your GPU whuile the rest goes to the CPU area, one in the front next to the harddrives also cools them and pulls air directly into the CPU space.
65880c7d5c4c730078f672232ee70fe7.png
sorry for the bad drawing, it was fun though.

Oh and last tip, you can actually get a splitter for the CPU or SYS FAN and use that to power the bridge fans. by adding these fans I bet you will be able to OC your MOBO and cpu or gpu more if that is what you desire.

Edit: I do Honestly believe that those fans will make the airflow of that case almost perfect, it will really drop the temps on almost all your components especially the vram and bridges. Also I have seen some people attach fans to there water cooling tubes with zipties to cool ram and move air around the case. that is all optional, I dont know if its beneficial or what, Just what I saw.
 
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