SeaSonic psu fan rpm monitor?

canthearyou · Post by **canthearyou** » Mon Aug 04, 2008 4:20 pm

I chose SeaSonic S12 II SS-430GB for my recent build, but could not find a connection for rotation monitoring. Is this typical for psu's with fan management now?

Vicotnik · Post by **Vicotnik** » Mon Aug 04, 2008 4:36 pm

Most PSUs don't have a cable for RPM monitoring. Among the PSUs I have used, only a few Antec models have had one.

jhhoffma · Post by **jhhoffma** » Mon Aug 04, 2008 7:17 pm

My older S12-330 has one. But this SPCR quote from the S12-330 review (sleeved version) should shed some light on the question.

Devon wrote:One final change is that the Fan RPM monitor cable has been removed. It is no longer possible to monitor the speed of the internal fan. Most likely, it was dropped because so many motherboards have trouble detecting an RPM signal at the slow speed that the fan spins.

nomoon · Post by **nomoon** » Mon Aug 04, 2008 7:20 pm

My older Seasonic S12 430 watt has one.

canthearyou · Post by **canthearyou** » Mon Aug 04, 2008 8:03 pm

jhhoffma wrote:My older S12-330 has one. But this SPCR quote from the S12-330 review (sleeved version) should shed some light on the question.

Devon wrote:One final change is that the Fan RPM monitor cable has been removed. It is no longer possible to monitor the speed of the internal fan. Most likely, it was dropped because so many motherboards have trouble detecting an RPM signal at the slow speed that the fan spins.

I suspected that might be the reason. My old Seasonic Super Tornado 300 has rpm monitoring and it is always very low. I had to adjust the monitor threshold down to keep alarms silent and this one must be slower.