Hi,
TL;DR I chose the Noctua AF14-PWM fans.
The difference between the AF15 and AF14 fans is that the AF15 uses 120mm fan mounts, the NF-AF14 should also have slightly higher max rpm. The Phanteks were not available at the usual online stores, the corsair 140mm maglev was more "power" than I needed and too loud in comparison to the others, the Bequiet silentwings are the most silent, but I feared the static pressure and air flow was not enought so in the end I went for the "most balanced" Noctua AF14-PWM fans.
[1]
http://www.silentpcreview.com/article1345-page7.html
[2]
http://www.silentpcreview.com/140mm_Fan_Roundup2
[3]
https://www.quietpc.com/140mmfans
A few remarks:
-The included noctua anti vibration mounts and also the included screws are not compatible to mount them as "HD fans" with the fractal R5 Design case. Fortunately I replaced the existing fan and reused the screws and another set of 4 screws for the second HD fan were included in the "fractal case accessory package". The included screws however work fine as rear cooler.
-I connected them in the following way:
FAN1 -> back exhaust (low speed adapter)
FAN4 -> CPU (low speed adapter)
FANA -> HD FANs (low speed adapter+ splitter)
I set the correct fan thresholds with the ipmitool and changed the fan mode to "optimal" which should be the optimal mode for this setup. I chose to connect both HD fans to the same FAN "port", because in my opinion it does not make sense to have different fan speeds.
The (redacted) result is:
Code:
How many whole minutes do you want between spin checks?
NOTE ABOUT DUTY CYCLE (Fan%0 and Fan%1):
Some boards apparently report incorrect duty cycle, and can
report duty cycle for zone 1 when that zone does not exist.
Key to drive status symbols: * spinning; _ standby; ? unknown Version 2018-01-01
Monday, Feb 11
ada1 ada2 Tmax Tmean ERRc CPU FAN1 FAN2 FAN3 FAN4 FANA Fan%0 Fan%1 MODE
22:19:06 *27 *27 ^27 27.00 -6.57 35 300 --- --- 300 300 20 20 Optimal
23:00:36 *31 *32 ^32 31.50 -2.07 61 800 --- --- 600 300 44 20 Optimal
23:41:07 *31 *32 ^32 31.50 -2.07 60 800 --- --- 600 300 44 20 Optimal
The max cpu temp was 60-61 and the max HD temp 32 (cpu and HD stress testing), looking at the fan speed in my opinion a great result. The fans are so silent that I had to move my notebook because he was too noisy. Without the stress testing CPU temp is 40-46 and the hardisks 30 celsius, with all fans at 300rpm.
ISSUE: At the beginning I had some very strange issues, FAN1 spinning up to max rpm or showing as rpm speed 28800 etc also the various fanscript(glorius1,stux..) seem to require some change if you use a X11 instead of a X10 motherboard need to investigate further. I fixed the issues by resetting the bmc a few times changing the fanmode and change it back to "optimal" and finally the rpm numbers were "stable".
Please let me know if you are interested that I keep this thread updated was also thinking to create maybe a new thread? Not sure how appreciated it is to post blog style posts in this subforum. As I'm a freenas and NAS in general noob I'm going to try out a lot of different things and probably encounter a lot of problems (e.g. if you want to run ubuntu as linux vm there is a tricky "bug" regarding the uefi bios), finding the best cloud provider for my backups, best backup solution for all the devices (apple, google, ...) rsync? some opensource solution? backup to external harddisk.... I'm also in the process to upgrade my network: apu2 router with opnsense and ubiquiti hd nano and 8 port ubiquiti switch are going to replace my fritzbox 7490 box, I want to try out (in the near future) LACP, VLAN's, 10GE, WAN failover and so on.
sorry for the long text and my poor english :D