Another cooling-solution with one big fan in the bottom. It's designed for my need and has two options for printing.
Most designs I saw are with two 120mm-fans. I think it's overkill and two fans produce double noise as a single fan.
Probably most people replaced already the two smaller fans ( next the mainboard) with more silent fans. Keep both of them in operation because their noise is minimal.
The problem is the loud fan in the PSU. Replacing with another 60mm-fan is pointless.
first my considerations:
• I didn't want to cut and drill the enclosure. You have to remove only the bottom and replace it with the printed one.
• I let the two smaller fans (next to the mainboard and rearside) still running, because I can't hear them. But I think with the new big fan, it wouldn't be necessary.
• I dont remove the bottom side from the PSU. It's part of heatsink and EMI-shield.
• I don't remove the power supply fan, it's temperature controlled and it won't turn on in future because the better cooling.
But you can remove the grid in the PSU-bottom for unhindered air flow.
• I think designs with two big fans are overkill, but no problem if you like it.
about my design:
• It's printfriendly designed, print the bottom in two ore one part as you like it
• The thin wall between the front legs should separate the suction airflow from warmer exhaust air behind.
• Speed of Noctua fan is in low-noise-mode. If you removed the other two smaller fans you can try with full speed.
I didn't compare the temperatures before and after, but the airflow is much better than before. You are free to do this measures and tell your experience here.
I bought a Noctua NF-S12A FLX Fan. I took the enclosed 4pin-adapter cable, cut the 4pin-plug and connected this cable with 12V on the mainboard. Later you can plug the fan-cable on it.
Mount the fan with the rubber mounts on the rear bottom part, air flow to outside. Cable goes through the recess to the inner side.
Plug in the fan-cable and mount rear bottom part and the rear foot. You will need some longer M3-screws.
Mount the front-foot on the bottom part and mount the whole thing.
In the middle you connect both parts with two small screws.
After some hours printing the noisy PSU-fan never switched on again and it's pleasantly silent now.
Small video see here https://youtu.be/mYvFE_qiJO0