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Asus PRIME B760 PLUS chassis fan headers

sebaxtian
Level 7

Wanted to ask you something about chassis fans on my motherboard. I have a total of three fans, each connected to a separate header and all the fans work correctly, but I am unable to see the rpm of all the fans, just the one fan that is connected to CHA_FAN1 header. Is that normal or I'm not doing something right? Thank you!

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6 REPLIES 6

svukelich
Level 7

More information is needed. What fan ports are they connected to on the motherboard? What software are you using to "see" the fans? Are the fans visible in the bios? Are the fans turning and, if  RGB, lighted?

The fans are ARGB and are connected to chassis fan headers and ARGB headers on the motherboard. The fans are all spinning and have ARGB lights working. In BIOS is displayed the speed for CPU fan and CHA_FAN1, and the others, CHA_FAN2 and CHA_FAN3, display 0 rpm, despite the fact that they have fans connected to their headers and they are spinning. Also, in HWMonitor it's the same, only CPU fan and CHA_FAN1. The fans have 3 pin connectors. The BIOS version is the latest, 1646. 

Have you tried different fan modes in BIOS? Three wire fans would normally use the DC mode, but auto should still provide the rpm indication. I have a couple of extra 3-wire fans connected to the motherboard running in auto mode and no problems. Perhaps the problem could be with the fans tacho sensors - have you tried swapping them around to see if the fans might be faulty in terms of the speed sense wires? 

Z690 Hero, 12900K, BIOS 3501, MEI 2406.5.5.0, ME Firmware 16.1.30.2361, 7000X Case, RM1000x PSU, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 23H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.

Silent_Scone
Super Moderator

As above, maybe run FAN Tuning from within QFAN  and manually set headers to DC.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

sebaxtian03
Level 7

Hello guys! I figured it out eventually. It was as JohnAb suggested, the fans. The case came with 3 fans, 1 120mm on the back and 2 200mm on the front. The fans from the front, 200mm, were connected to 2nd and 3rd header. When I switched the 1st fan, 120mm, to 2nd header, it was ok, I could read the rpm in BIOS. So, I guess I have to replace the fans from the front of the case, maybe I'll put 3 of 120mm, instead of these 2 of 200mm. Thanks for the help!

Sometimes, the fans that come supplied with cases aren't of the best quality. Glad you know what the problem is now. 

Z690 Hero, 12900K, BIOS 3501, MEI 2406.5.5.0, ME Firmware 16.1.30.2361, 7000X Case, RM1000x PSU, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 23H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.