cbell4 Posted July 17, 2014 Share Posted July 17, 2014 Since I found nothing about this issue on the net and finally figured out a solution, it made sense to post it here for reference. My H100 has been running fine for over a year on my Asus P9X79 Deluxe. The pump is connected to the CPU fan and both fans are connected to the pump. I recently updated the mobo firmware to version 4701 dated 05/07/2014. Upon reboot, both fans initially turned on full speed for about a second then stopped. The pump continued to run as indicated by a CPU fan speed above 3700 rpm (typically stays at 3792). At some point I noticed that the H100 was in link commander mode (little man icon is on). I have never had a link commander and I am almost certain my H100 was NOT in this mode before the bios update. I reset the firmware - no effect. I did it again and still no change. I tried various bios settings, including suggestions found from other posts in this forum: set Q-fan control to 200 or Ignore set CPU Fan to Ignore instead of Monitor disabled Q-Control altogether other power related settings in bios with computer on, unplug and replug fans into H100 All had no effect. I plugged one of the fans into a mobo chassis fan connector and bingo! Got control of that fan via the motherboard and Asus AI Suite Fan Xpert+. Tried plugging the other fan into CPU fan OPT since it was nearest but Fan Xpert+ can't control that fan (which doesn't make sense) so I moved it to another chassis fan connector. In Fan Xpert+, I tested one of the fans and got these results: Power RPM 100% 2448 90% 2290 80% 2035 70% 1760 60% 1465 50% 1124 40% 90 30% 0 So I set created a user defined setting for both fans. At 30 deg.C they run at 40% power and go up to 100% power by 70 deg.C. If you have a similar problem, I hope you land here before spending a lot of time finding a fix! Link to comment Share on other sites More sharing options...
wytnyt Posted July 17, 2014 Share Posted July 17, 2014 cpu-opt is controlled by the cpu-fan connector.. you may want to check for a bios or netframework to see if their up to date p9x79 gets shipped with some very old bios... Link to comment Share on other sites More sharing options...
cbell4 Posted July 18, 2014 Author Share Posted July 18, 2014 That makes sense about the cpu-opt fan. Thx. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.