Question Cpu overheating after new radiator and fan installed

[Ogsanti]

My computer turned off randomly about a week ago. After turning it back on it was showing that my cpu temp was high. It showed my fan speed was not working. I just decided to get a whole new radiator and fan to install. After installation there is no changes the temperature is high I took off the water block and reapplied the thermal paste but nothing worked. Also if I turn on the pc and just leave it on it will not increase in temperature. Only when I start to use it like watching YouTube for example it starts to increase in temperate to above 90 C. Need help or some advice please

 

[MasterWigu]

Have you verified that the pump is powered up and running? Is it an AIO or a custom loop?