TerraMaster Forum

My F4-425 Pro (i3-N305) chip has the same problems as the N350 Chip in the other topic, maxing out at around 98 °C under a load of 20-25%.

The N305 chip has a TDP of 15W and a TDP Down of 9W. Depending on the cooling. In the BIOS it's 13500 so that's not bad when it's put in a desktop with good cooling. I think in this case it should be 9W standard. Also: The max draw is not limited so my Chip will take in the max of 35W according to the Intel ARK site. This will bring it to 98 °C in my F4-425 Pro. 35W max is only for Desktops with proper Cooling according to the Intel ARK site. it wil run at 3.8 GHz. on all cores.

So, all F4-425 models have the same bios and settings but different chips?

I guess a BIOS firmware update is needed for this with a differentiation of the 350 and 305 chips.
Especially capping the max Watt limit of the CPU to ensure the chip is not frequently overheating and dying after several months of use.

I used the Intel Rapl to test the wattage after BIOS tweaks; PL1: 9000 and PL2: 15000.
Test results:
Situation: Duration: Package power: Temperature:
Idle 120s 4,27 W 50 °C
Load, 12% 10 s 8,96 W 82 °C
Load, 18% 120 s 8,99 W 89 °C

Editing the settings work but the temperature still is quite high here.
Looks like I also have a unit with the thermal paste applied wrong....

I will bring all setting back to stock and do the test again later and post it here with pictures.

Start with the simple stuff, seriously do you feel the fan blowing air? Is the fan setting set to auto?

Fan blows air, Fan is going to 1400 RPM under load. No problem there. all the simple stuff is already checked.

I know it's apples and oranges, but on every Tnas I have the fan(s) run at over 2000rpm at full speed and probably about 1800 on auto. The ambient today is about 35C. (See sig for models)

RoKo77NL wrote: ↑12 Aug 2026, 20:25

Thank you for your feedback and detailed analysis!

We look forward to seeing your follow-up test results and pictures with the stock settings.

Gremlin wrote: ↑13 Aug 2026, 00:29 I know it's apples and oranges, but on every Tnas I have the fan(s) run at over 2000rpm at full speed and probably about 1800 on auto. The ambient today is about 35C. (See sig for models)

Thanks, Ambient on my system is around 33C. So, not so different from yours. What are your CPU's doing idle and under load?

Idle round 44C. Load - I don't load them that much, so not comparable.

CPU temperature / power behaviour – TerraMaster NAS

I've been investigating unusually high CPU temperatures on my unit.

The NAS is currently completely back to stock configuration, including the original BIOS defaults. I measured the CPU package power using the Intel RAPL energy_uj counter over 120-second intervals.

For comparison, I also tested a PL1 = 9 W / PL2 = 15 W configuration.

Configuration Avg. package power CPU temperature / behaviour
Stock – idle 4.35–4.38 W 54–56 °C
PL1 9 W / PL2 15 W – idle ~4.27 W ~50–53 °C
Stock – 4 Transmission torrents ~10.03 W ~94 °C, thermal throttling
PL1 9 W / PL2 15 W – Transmission ~8.99 W Peaks around ~89 °C
Stock behaviour

With the NAS completely stock, the CPU reaches approximately 88 °C within 20 seconds after starting four Transmission torrents. It subsequently reaches around 94 °C, at which point the CPU starts throttling. The temperature then drops to around 86 °C before rising again.

The fan was reporting approximately 84% / 1450 RPM during this behaviour and did not appear to increase significantly beyond that.

After stopping Transmission, the CPU temperature dropped from approximately 94 °C to 64 °C within about 10 seconds.

Power-limit test
As a comparison, I temporarily configured:
PL1: 9 W
PL2: 15 W

A 120-second RAPL measurement under sustained Transmission load showed approximately 8.99 W average package power.
This reduced the maximum observed temperature somewhat, but the CPU could still reach approximately 89 °C.

Interestingly, idle package power was essentially unchanged between the configurations (~4.27 W vs. ~4.35–4.38 W).

Question
Could TerraMaster please clarify whether these temperatures are considered normal for this CPU/cooling solution?
In particular, I'm interested in whether the combination of:

~54–56 °C at only ~4.35 W idle package power;
~94 °C under approximately 10 W sustained package power;
thermal throttling under sustained Transmission load;
and the fan apparently topping out around ~1450 RPM;

is expected behaviour, or whether this unit may have a thermal interface, heatsink/contact, fan-control or other hardware issue.

I've attached screenshots of the temperatures, fan speed and measurements.

Thanks!

EriChan wrote: ↑13 Aug 2026, 14:49

RoKo77NL wrote: ↑12 Aug 2026, 20:25

Thank you for your feedback and detailed analysis!

We look forward to seeing your follow-up test results and pictures with the stock settings.

I uploaded the results. I have not reached the 98 I got earlier but 94 in sustained tests.

Thanks!

RoKo77NL wrote: ↑13 Aug 2026, 22:28

High CPU temperature under low load usually indicates degraded thermal paste. Please reach out to our support team for warranty service.