Noctua NH-D15 RAM height for second fan?

Joined
Mar 29, 2012
Messages
752
So, I'm building a new PC and I didn't want to deal with water cooling, so I wound up getting a Noctua NH-D15 air cooler because it was said to be one of the best. Supposedly these 125W CPUs run hot enough that my old standby, the Hyper 212 EVO, wouldn't be sufficient to cool it.

I haven't gotten the RAM yet, but I realized after ordering my fan and my RAM that I made a big mistake. I didn't realize I needed shorter RAM in order to have a second fan fit on there properly. I wound up with this kit:

https://www.newegg.com/p/0RN-00NP-00037?Description=xlr8 3200mhz 32gb&cm_re=xlr8_3200mhz 32gb-_-0RN-00NP-00037-_-Product

It was a lot less than the pictured price when I purchased it, though. about $156. So I'm wondering what I should do. AFAIK, I have basically three options:

1. Use the CPU cooler with the second fan fitted on improperly, poking up above the heatsink.

2. Return this RAM unopened, and get Vengeance LPX memory or something. I hope I don't need to go for VLP memory, because that would be hard to find at good speeds and capacities.

3. Remove the heatspreader from the RAM and hope it works fine without it. Would this remove enough excess height to make the second fan fit properly?

I have no idea what the best course of action is at this point.
 

MissJ84

2[H]4U
Joined
Dec 22, 2009
Messages
2,148
Assuming your case can handle the height, I would probably go with the first option. You could also use only one fan, which is what I do and temps should be fine.
 

Starfalcon

Gawd
Joined
Jan 7, 2020
Messages
633
You can also do what I did with mine and put the second fan on the back and leave the middle one where it is. I could have fit the fan over my corsair dominators, but I wanted to be able to see the blinkenlights I paid for. Runs plenty cool with no problems with my setup.
 

pitingres

Limp Gawd
Joined
Jul 25, 2018
Messages
165
If option 1 doesn't work out, try #4 remove the front fan and replace it with a 120mm A12x25. (or other 120mm fan of your choice.) You'll get nearly all the benefits without the clearance hassle.
 

John1780

n00b
Joined
Oct 18, 2013
Messages
38
If option 1 doesn't work out, try #4 remove the front fan and replace it with a 120mm A12x25. (or other 120mm fan of your choice.) You'll get nearly all the benefits without the clearance hassle.
This. Works well, and what I did in the same situation. PM me for my spare 120mm NF-F12.
 

motqalden

[H]ard|DCOTM x3
Joined
Jun 22, 2009
Messages
1,998
^^ I put a 120mm fan in the front of my D15S as it solves the height issue. I didn't really notice much of a difference in cooling so option 1 is totally cool.
 

Choopyplz

Limp Gawd
Joined
Dec 19, 2013
Messages
198
I have the NH-D15S and Corsair LPX RAM, and even still the front 140mm fan that I added pokes out over the heatsink, and that's with it literally sitting on top of the RAM haha. Works fine though, the only issue I could see is if the clips don't attach properly with you having to have that fan sitting up so high. I'd echo the other responses in this thread and either use a 120mm fan on the front instead (the Noctua clips are a 120mm fan spacing) or move the front fan to the left so that it is set up in a pull rather than push config. Depending on your mobo that still could cause clearance issues, but it's worth a try.
 

Falkentyne

[H]ard|Gawd
Joined
Jul 19, 2000
Messages
1,744
So, I'm building a new PC and I didn't want to deal with water cooling, so I wound up getting a Noctua NH-D15 air cooler because it was said to be one of the best. Supposedly these 125W CPUs run hot enough that my old standby, the Hyper 212 EVO, wouldn't be sufficient to cool it.

I haven't gotten the RAM yet, but I realized after ordering my fan and my RAM that I made a big mistake. I didn't realize I needed shorter RAM in order to have a second fan fit on there properly. I wound up with this kit:

https://www.newegg.com/p/0RN-00NP-00037?Description=xlr8 3200mhz 32gb&cm_re=xlr8_3200mhz 32gb-_-0RN-00NP-00037-_-Product

It was a lot less than the pictured price when I purchased it, though. about $156. So I'm wondering what I should do. AFAIK, I have basically three options:

1. Use the CPU cooler with the second fan fitted on improperly, poking up above the heatsink.

2. Return this RAM unopened, and get Vengeance LPX memory or something. I hope I don't need to go for VLP memory, because that would be hard to find at good speeds and capacities.

3. Remove the heatspreader from the RAM and hope it works fine without it. Would this remove enough excess height to make the second fan fit properly?

I have no idea what the best course of action is at this point.

There's absolutely no problem with two fans with one offset. I ran my NH-D15 for years like that with tall heatspreader RAM. Absolutely zero problems and it doesn't affect the cooling performance. If you notice the fins on the heatsink, they're designed to have fans mounted like that, unlike heatsinks that have fixed holes in the stack, etc...
 

Mizzer

Weaksauce
Joined
Jan 21, 2021
Messages
122
Ran a Nh-D15s on a 3900x with one fan in silent mode for years. The D15 is such an excellent cooler.
 
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