ReadyNAS Pro 6 Temperature

My Pro 6 temperature under normal load:
Temp SYS 55 C / 131 F [Normal 0-65 C / 32-149 F]
Temp CPU 30.5 C / 86 F [Normal 0-85 C / 32-185 F]

Is this normal? It seems it is 5 degree higher then norm.

Intel says the core temperature reading could be +/- 10C.

My Pro 6 temps:
Temp SYS 51 C / 123 F [Normal 0-65 C / 32-149 F]
Temp CPU 28.5 C / 83 F [Normal 0-85 C / 32-185 F]

Unit is in a spare room with current house temp at 74 F.

Temp SYS	58 C / 136 F [Normal 0-65 C / 32-149 F]
Temp CPU	35.5 C / 95 F [Normal 0-85 C / 32-185 F]

It has always bothered me that the Pro 6 System temperature is close to the end of the normal range (65 C). In summer it went over that a few times which caused it to issue alerts. The strange thing is it doesn't seem to increase the system fan RPM as the system temperature increases, just the CPU fan. This also made me think the labels were the wrong way round.

bajorgensen wrote:
I can confirm the permanent 50 degrees on the Ultra 6 with .22 as well. Even thought the atom cpu has a passive heat sink, the fan blows pretty well over the cpu. The case is pretty well designed. I've replaces the fan with a more quiet and effective on, and disabled the PSU fan. Very quiet and no problems!

I have the problem with the constant 50 degrees as well on a readynas ultra 6 running 4.2.22. Before the cpu was running at around 28-40 the new constant 50 makes the fans spin faster and make an annoying high pitched noise. Is there any way to roll back to 4.2.21 because this really feels like a software bug (i can turn off the unit for a while boot it 50 degrees cpu, run a lot of cpu heavy things, still 50 degrees cpu :(

Ney wrote:

bajorgensen wrote: I can confirm the permanent 50 degrees on the Ultra 6 with .22 as well. Even thought the atom cpu has a passive heat sink, the fan blows pretty well over the cpu. The case is pretty well designed. I've replaces the fan with a more quiet and effective on, and disabled the PSU fan. Very quiet and no problems! I have the problem with the constant 50 degrees as well on a readynas ultra 6 running 4.2.22. Before the cpu was running at around 28-40 the new constant 50 makes the fans spin faster and make an annoying high pitched noise. Is there any way to roll back to 4.2.21 because this really feels like a software bug (i can turn off the unit for a while boot it 50 degrees cpu, run a lot of cpu heavy things, still 50 degrees cpu :(

Ok i figured out that a rollback was easy as pie. And CPU temperatures are now back to normal! :D So I at least can recommend people with constant 50C temperatures to roll back to 21.

Hi all,
CPU temperature on Ultra 2/4/6, Pro 2/4,
Display 50C for DTS reading if CPU temperature < 50 degree C,
The below is all about CPU temperature reading:
1. Intel processors have two temperature monitoring mechanism, thermal diode and Digital Thermal Sensing (DTS)
2. Thermal diode is not accurate, its accuracy is prone to PCB layout, component variation, to use it, the system needs to be calibrate individually.
3. DTS reading is relative temperature compare to Tjunction. The Tjunction is maximum temperature the CPU can safely reach, beyond Tj, the CPU may be damaged. Linux coretemp driver translates relative temperature to human readable temperature, i.e. in Celtics degree.

We decided to use DTS for RNDU2/4/6, Pro2/4, the following must be taken care when DTS is used:
1. During a period time after boot, DTS reading may be shown as “Resource temporarily unavailable”
2. During a period time after boot, DTS reading may be very low, e.g. < 30C
3. When CPU is overheating, DTS reading may be shown as “Resource temporarily unavailable”, Also kernel log shows CPU speed throttle kicks in.

Because of above reasons, we decided to do following:
1. For any DTS reading less than 50C or “Resource temporarily unavailable”, display CPU temperature as 50C, this is per Intel’s guide line: Anything below 50C is OK and should be treated as reference only
2. CPU overheating shall never happen, guaranteed by hardware design, we stress CPU to its TDP under 40C room temperature. So there will be no overheating in promised operational range. Software does not need to handle overheating reading of “Resource temporarily unavailable”.
3. Intel CPU has two hardware mechanism to prevent overheating should we fail our hardware guarantee(which is very unlikely): CPU speed throttle and CPU thermal shutdown

Thanks for the clear answer.

Thanks but this thread has gone off topic - as per thread title, it was about the high system temperature on the "PRO 6" compared to the low CPU temperature. The Pro 6 SYSTEM temperature never seems to go under 55C for me in a room with a temperature of 23C currently. It reaches 55 very quickly after power on from cold. All fans working/free from dust.

There is CPU fan in Pro6, so CPU temperature is low, I need to ask RD to check Pro 6's system temperature.
There is not CPU fan in Ultra 2/4/6 and Pro 2/4,