超微 SC-847 风扇墙

Summary

Hello all. Long time lurker, first time poster. Hopefully I am filling out all of this correctly. I recently acquired a Supermicro SC-847 4U server chassis. The system comes with seven, yes SEVEN, jet turbine 80mm Nidac high RPM fans. While they cool the (up to) 36 drives as well as dual xeon chassis very well, they are way too loud.

I looked around online, and could only find a 3d print being sold for a SC-846, which has a different layout than the 847. I did see where people had shoehorned 120mm fans into the 847 using foam, double sided tape, etc, but I figured that may wear out over time. And I have my 3d printer, so I figured I would give a shot at designing a fan wall. I had originally thought about using Noctua 140mm fans, or possibly their industrial 3,000 rpm 120mm fans, but I didn't think these would have enough static pressure to pull air through the grates on the hard drive caddys. I decided on Coolerguys 140mmx38mm high static pressure fans.

Since the fan wall would be so wide, I figured I would chop up the STLs into three sections and make them able to be attached together. The fans are also pretty fat, so I needed to be mindful of clearance between the fanwall and the SAS backplane. The original 80mm fans were parked higher up in the chassis, leaving lots of room for power cables and SAS cable routing at the bottom. Since I was going to be using 140mm, these would take up much more room vertically.

I used the OEM fan mounting holes on the sides of the chassis, and I had planned on using the OEM holes in the bottom, but the way the layout ended up, the hole was directly below the mount for the fans which would make screwing in a screw pretty difficult. So I left those areas pretty much open to make install easier. I left some openings in the bottom for passthroughs for cables, haven't decided yet if i will close up the open space with heavy duty tape or something, but for now I have left it open without any issues (still tons of airflow). I did end up using the center screw hole as it was easy enough to reach, though it was not required. I also lined the bottom of each piece with Gorilla double sided tape which I had planned to use to help secure the setup, but I ended up just leaving the tape not secured to the chassis, so it is more of a vibration damper. For the screws, I just used some (I believe) 6/32nd zinc plated screws, I believe either 45mm or 50mm length to attach the fans to the fan walls. I used those metal fan shields on the back sides of the fans, as the clearance back there was really tight and cables likely would have been shredded by fan blades (see pics). To mount the fan wall pieces together, I just used some random m2 bolts, washers, and nuts that i had laying around. You could use other sizes, just drill out the holes for whatever size you need. The holes that line up with the chassis side screws, I made a little smaller. That way when screwing in from the outside, the threads of the screw would have some plastic to bite into. I set them fairly snug, but not overly tight to strip out the plastic. Another option would be to put in longer screws from the outside, with a washer and nut on the inside to hold it. But either way, with as packed in as this thing is, it shouldn't be moving much if at all.

To finish it all off, I bought a fan hub that is controlled by SATA power, and has a knob to control the fans. I leave it set to max most of the time especially when heavy write jobs are going to the HDDs (I currently have 16 bays up front populated with 14TB drives and using TrueNAS), and so far, the drives have remained pretty cool while still giving plenty of cooling to the CPUs and RAM. Very happy with the results. The 140mm fans are still loud at full blast and move a ton of air, but they dont have that horrible scream of the 80mm fans. Lower pitch is much easier on my ears (probably the tinnitus). Why did I pick orange? Well, thats the color filament that I had in my printer at the time.

Feel free to use the attached STLs for your own use. If you want to modify the design, please feel free to do so. I do not authorize these to be used for sale and profit. If you have any questions, please feel free to hit me up.

Thanks, and happy printing.

Print Settings

• Printer brand:

  AnkerMake

• Printer:

  AnkerMake M5

• Rafts:
  No
• Supports:
  No
• Infill:
  10%
• Filament brand:

  Inland Filament

• Filament material:

  PLA+