Dark Rock Pro 4 middle fan swap and remove the 120mm

Relentless81

Relentless81

Relentless81

Soldato
Joined
18 May 2010
Posts
12,832
Hi,

This is a long shot so I dont expect any replies to be honest.

The DRPro4 comes with a middle 140mm fan which spins quite slowly compared to the outer 120mm fan

I know you can remove the outer 120mm fan and just use the middle, IMO this makes it look much nicer but in my testing temps went up which is contrary to I think it was Bitwit's testing on Youtube but it definitely went up for me.

The two fans have different mounting to case fans so as to utilise the fan clips

My question is, has anyone swapped out the middle 140mm fan with a Silent Wings 140mm High Speed case fan successfully and managed to use the fan clips?

Another option would be to remove the 140mm and relocate the 120mm to the middle as it has the right mounting on the fan for the clips

If you're wondering why the hell I want to do this, one reason is I think it looks loads better without the outer fan, the other is that I would prefer less fans in my system if I can get away with it and another is the outer fan covers my RAM

Thanks
 
The middle fan is 135mm, not 140mm. If it does in fact use 120mm fan holes (105mm hole spacing) there are a few other fans with this hole spacing. How much room is there between the 2 fin-packs? If there is enough room you might be able to fit a NF-A15 Chromax (140x150x25mm) 1500rpm black fan. Or maybe a Thermalright TY-147A or TY-147B (152x140x26.5mm 1300rpm w/ black housing/white impeller).
 
Ah course it's 135mm I completely forgot about that!

I might put the 120mm from the front in there and do some testing to see the difference in performance first as that won't cost me anything, I've already tested just the 135mm fan on its own in the middle and that saw higher temps so maybe the faster 120mm will be better
 
My guess is moving 120mm fan to middle will not perform any better than stock 135mm fan, maybe not even as well. Typically 2x fans on a cooler (single or twin tower) give same temps at same noise levels. That is because single fan is 2-3dB quieter at same speed so while 2 fans move a little more air at same noise level it is slight lower speed, and if single fan spins slightly fast it not only make same amount of noise but flows same amoutn of air. ;)
 
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