MagosiYT :
Thank you! But now I have a question.It shows my fan at 750RPM when my usage is at 70%+ , shouldn't the fan be getting faster if it detects my high temps? Is there any way to increase the fan speed?
speaking of fan location connectors: on the manual page diagram of your motherboard
https://www.manualslib.com/manual/485172/Intel-Dq35jo-Desktop-Board-Executive-Series-Motherboard.html?page=12#manual
items :
H - Rear chassis Fan 3pin
L - CPU fan 4 pin
U - Front chassis Fan 3 pin
has I am looking through the manual for your motherboard located at :https://www.manualslib.com/manual/485172/Intel-Dq35jo-Desktop-Board-Executive-Series-Motherboard.html#manual
And I do not see anything jumping at me from the index pages... but found two information bits that kind of does answer the questions of how it controls the fans.
under power features and acpi functions I found:
Fan Headers: The function/operation of the fans is as follows:
The fans are on when the computer is in the ACPI S0 state.
The fans are off when the computer is in the ACPI S3, S4, or S5 state.
Each fan header is wired to a tachometer input of the hardware monitoring and
control device.
All fan headers support closed-loop fan control that can adjust the fan speed or
switch the fan on or off as needed.
All fan headers have a +12 V DC connection.
The Desktop Board has a 4-pin processor fan header and two 3-pin chassis fan
headers
then I also found under the BIOS section
Hardware Monitoring and Fan Speed Control: The features of the hardware monitoring and fan speed control include:
Monitoring of power supply voltages to detect levels above and below acceptable
values
Intel Quiet System Technology fan speed control, delivering acoustically-optimized
thermal management
NOTE: Memory must be installed in the Channel A, DIMM 0 socket to enable Intel Quiet System Technology.
Fan speed controllers and sensors integrated into the ICH9DO Thermal sensors in the processor, GMCH, and ICH9DO, plus an onboard remote sensor
NOTE: The minimum thermal reporting threshold for the GMCH is 66 °C. The GMCH thermal sensor will display 66 °C until its temperature rises above this point.Thermally monitored closed-loop fan control, for all onboard fans, that can adjust fan speed or switch the fans off as needed
that last line seems to indicate you can control them from the bios screen. (how I read it but I am French so I could be reading this wrongly)
which would lead me to asking what version of BIOS you have, as on the original link page I posted for the software there were quite a number of BIOS updates maybe it is what you need for it to work ?
here is a quick link the Bios download page I see Last Bios Number as being 1143
https://downloadcenter.intel.com/product/50382/Intel-Desktop-Board-DQ35JO
if all else fails you could , change the fans themselves and get some with faster low revs (ie instead of fan that start at 300 get some that start at 500 so they will get to high rpm faster, or change for a set of fans that have switches on them and set them to a medium or high state of revs.
hope any of this helps your issue