Access sensors of PowerX H61 motherboard

I have recently bought a motherboard of the PowerX model having an Intel H61 chipset -- [this one](https://www.power-x.in/products/power-x-motherboard-pmb-h61-ddr3) . I ran the sensors command and it shows only the CPU temperatures. Fan speed is not available. Running sensors-detect did not help. By looking at the hardware, I can see there are 4 pins for the CPU fan, so reading fan speed & PWM control should work. On another motherboard, I got the CPU fan speed and could also control the fan speed. Looks like Linux has less support for the PowerX motherboard or the appropriate drivers are not loaded. How can I manually probe the motherboard for sensors and PWM controls? Is there any online documentation available for this motherboard?