Wow, that's an impressive solutionI can see the appeal of not needing to cut a circle in the top panel, in case one later wanted to sell it.
Hope it all goes smoothly for you.
Yeah the fan detection is weird. I have had one Noctua fan work - the NF-A20, their 200mm beast. But none of their 120mm ones worked. I didn't bother trying any others, but it's good to know the 80mm doesn't work either.
So with the Arctic fans, as well as having them detected OK, do you also have functioning PWM control? You can change their speed from the switch (eg set fan-speed [1-3] in Brocade FW)? That's broken along with detection with my Noctua fan, though that's turned out to be OK because without PWM control it runs at a low/lowest speed, and that's proved perfectly fine for temperature.
My 1 x 120mm fan mod is holding up well. Completely silent when the switch is located in the annex area of my office, about 5 metres and around a corner away from me. Temperature holds steady at 50-52°C when ambient is 20-23°C. And I can get it as low as 40° if I open a door in the annex that opens into an undeveloped roof crawl space, allowing air to circulate which is at 10-15°C (at least for now, in the current wintery climate.)
One thing I didn't mention before: as well as modding the fan I also changed the thermal paste on the main CPU heatsink, using expensive enthusiast/overclocker's stuff instead. For some reason I didn't properly record before/after temps, but it may be helping to reduce temp another 2-4°C or so.
Good luck with your mod!
Hi, TheBloke,
To answer your question, I haven't hooked up the tach for the left fan (opposite the power supply), but I'm getting correct PWM control, reporting of fan status, and temperature with the Arctic F8 fans (33C intake, 36C idle exhaust at fan speed 3 - see below).
SSH@10g-sw1(config)#show chassis
Power supply 1 not present
Power supply 2 (NA - NA - Regular) present, status ok
fan 1 failed
Fan 2 ok, speed (manual): 1<->2<->[[3]]
Fan 3 ok, speed (manual): 1<->2<->[[3]]
Fan controlled temperature: 36.0 deg-C
Fan speed switching temperature thresholds:
Speed 1: NM<----->30 deg-C
Speed 2: 25<----->40 deg-C
Speed 3: 35<----->90 deg-C (shutdown)
Exhaust Side Temperature Readings:
Current temperature : 36.0 deg-C
Warning level.......: 80.0 deg-C
Shutdown level......: 90.0 deg-C
Intake Side Temperature Readings:
Current temperature : 33.0 deg-C
Boot Prom MAC: 00e0.52c1.ec8b
SSH@10g-sw1(config)#
Power supply 1 not present
Power supply 2 (NA - NA - Regular) present, status ok
fan 1 failed
Fan 2 ok, speed (manual): 1<->2<->[[3]]
Fan 3 ok, speed (manual): 1<->2<->[[3]]
Fan controlled temperature: 36.0 deg-C
Fan speed switching temperature thresholds:
Speed 1: NM<----->30 deg-C
Speed 2: 25<----->40 deg-C
Speed 3: 35<----->90 deg-C (shutdown)
Exhaust Side Temperature Readings:
Current temperature : 36.0 deg-C
Warning level.......: 80.0 deg-C
Shutdown level......: 90.0 deg-C
Intake Side Temperature Readings:
Current temperature : 33.0 deg-C
Boot Prom MAC: 00e0.52c1.ec8b
SSH@10g-sw1(config)#
Here's some ballpark measurements after 30 minutes idle at each speed 1-3 (updated after repeating testing).
Fan Speed 1: 36C intake, 40C exhaust
Fan Speed 2: 36C intake, 38C exhaust
Fan Speed 3: 33C intake, 36C exhaust
I've got most of the design worked out, and I'm 3D printing the fan assembly in PETG via 3DHubs for about $30 - should be here by the weekend to test. I ended up making the fan shroud reversible (vertically) to allow more flexibility in my rack space.
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