Cooler Master Hyper TX3 Evo strange fan behavior

[Aleshotgun]

I've recently installed the Hyper TX3 Evo by CoolerMaster (replacing my old Intel stock cooler) but since the first day, I've experienced some strange issues related to the fan.
The first day the fan was spinning at max rpm, till I managed to enable q-fan control on "standard" inside the BIOS, but after that I've noticed that sometimes when turning the pc on, the fan would not start at all (or start for a bit then stop immediately) giving the cpu fan error in POST.
Then after other testing, I've noticed that in some occasions the fan would totally shutdown 30 minutes or so after logging into windows (it happened inside the BIOS too), two times I was playing a game (when this happened, the "cpu fan" section inside Everest would totally disappear)

Yesterday I've made test the whole day, rebooting or shutting down and starting the pc again, the fan worked properly (no spinning issues or noises, it starts smootly) but I've noticed another strange behavior: sometimes, the idle/stress RPM was a bit off, for example in some occasions the RPM stays like this: Idle: 1000-1600RPM / stress: 1600-2100RPM and that's ok because the cpu stays cool and silent. But some other times i notice that the idle speeds change to 1700-2200RPM and under stress it stays always high like 2200-2600RPM (notice that I've tested with the same game, same internet browser and same idle situation with no other programs in BG) and to "fix" this I simply reboot and the fan would work properly for the entire session.

Can I assume that this is a mobo/bios problem or I have to request a refund? I'm struggling because I don't want the 15 days to expire before I can ask a refund (I bought the cooler on ePrice)

On a side note, I've also noticed that the cpu temp stays a little high when the fan is spinning at max speed (that doesnt make any sense to me), I dont know if is a fan reaction to high temp because it happens also when I set the q-fan on "disabled" and so the fan always spins at max rpm, the temps stays at 60c on idle, but when I set the fan to auto mode, at lower rpm, the cpu stays on 35-40c idle.

Hope someone can help me figure out somethin, my pc specs:
Cooler Master HAF932 (the case)
Cooler Master 700W Psu
Asus p6t (normal version with just one CPU_FAN slot)
i7 920
16 gb (4x4) corsair vengeance

 

[Lutfij]

The fan speeds in the BIOS for the CPU_FAN should be set to AUTO, that seems to be the solution to your problem. I assume your BIOS is up to date and that your running Windows 10? If so then the same issue has been seen on some older and newer system's running the new OS. The solution to that is either a clean install since the automatic updates tend to cause this or a BIOS update(if there are any).

FYI, the temps at idle when on AUTO is just about right for your CPU.

 

[Aleshotgun]

TBH I made this build long time ago (early 2010) but I've never update the BIOS (never had the urge to do so) so I guess I should try update it first. The cpu fan setting on BIOS (Q-Fan on my BIOS ver) is set to "Enabled" and then to "Standard" (other options are Silent and Turbo, but I feel like Standard mode fits best in terms of noise/cooling). I'm actually running Win10 Pro with all the latest updates, but that's a recent fresh install (I bought an SSD some days ago, as well as the new cooler) anyway I've noticed that the issue is the same when I just navigate the BIOS, so I can assume that the culprit is not win10, at least not at all I guess

Glad to hear that the temps are ok, it was my first time installing a new cooler as well as the thermal compound, so I can assume that I didnt screw up anything (the cpu is on stock voltage/clock). Oh and I also noticed that the temps are generally low when gaming: after some hours of gaming I never went over 60c, mantaining mostly on 50c or below (Fun fact: when the fan stopped the first day, I didnt noticed that till I checked, but the temps never reached 70c even with the fan totally off)

 

[Lutfij]

If you're not overclocking then there is some room for more reduced temps. There is a term known as undervolting which means that at stock clocks you can actually try and have your processor run with lower volts. AUTO volts just mean that the board is supplying the processor with higher volts than necessary.

I you're not familiar with the voltages then I'd suggest you leave it alone. If you're interested then some tinkering time needs to be allocated.

 

[Aleshotgun]

Honestly I never OCed or changed voltage and as you imagined, I'm totally not familiar with this kind of tweaking, but as long as my temps are ok, for now will leave it there, but maybe I will reconsider it in the future (with the help of someone more experienced than me)

Anyway I made some other tests moments ago, and this is what I got: After work I turned on the pc for the first time of the day (electric current was plugged all night tho) and I've noticed that the cpu fan didn't started instantly, causing the POST to give me the "cpu fan error", but after a few seconds the fan started normally, hitted F1, windows booted normally, but the fan was turning strangely at high RPM all the time, even in idle (it wasn't stucked at max RPM, but floating between 2000-2300RPM). I rebooted and the problem was gone. So I wanted to try and unplug the side case fan (Actually my case has a total of 5 fans inc. the cpu one, 3 of them are plugged into the other 3 pins mobo slots, and the side one is plugged directly onto the PSU with a 2 pins slot cable), but nothing strange happened, even with or without the side fan plugged, I rebooted 4 times and the cpu fan was working normally.

I'm really struggling with this strange issue, it seems I cannot always made the problem appear and this is driving me nuts. Is maybe a voltage issue? The fan seems to work perfectly but I really don't know if I have to request a refund or not, same for the BIOS that in most of the cases can manage the cpu fan behavior as it should be.

 

[Aleshotgun]

Update: I've made some tests these 2 days, and I've noticed that the culprit is not the fan. Infact, the fan is working properly, spinning faster as the cpu gets hotter, but the strange thing is that there's no background processes and the cpu use is always low (maybe some strange service?), but for some reason the core multiplier sometimes stays on 21x (with the max clock speed of 2800mhz) even in idle. It gets hotter particularly when I don't touch anything after a few minutes (with the cpu always at 21x) and then it drops instantly when I move the mouse.

Also, when I first log into windows every day (happened yesterday and today) it seems to stay hotter the whole time (45c idle, 60c every single core) and this is annoying because the fan is spinning at higher rpm all the time, making more noise. When I reboot all go back to normal (30c idle) and I cannot make the issue appear again, even if I reboot or shut down completely the pc for a bunch of hours.

P.S. Actually my cpu temp is 30c while the cores are on 43-47c, it is that a normal gap between cores and cpu temp?