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1. Poor thermal contact within the CPU itself:
Some CPUs,
such as Intel LGA-1151 socket based Skylake, Intel LGA-1150
based Haswell and older, and socket LGA-1155 based Ivy Bridge
are notorious for their poor thermal contact between the CPU die
and the heat spreader (IHS) itself, due to the use of poor TIM. This
is the problem of the processor and not the CPU liquid cooling unit.
These CPUs are known to run very hot (80°C+) even on factory set
frequencies. For best performance, it is usually recommended to
replace the TIM between the die and the IHS or to even run the
processor de-lidded. Both require hazardous IHS removal which
voids processor’s warranty but can lead to temperature decrease
of 30°C and higher.
EKWB deems der8auer Delid Die Mate tool safe to be used
by experts for de-lidding of the Intel Skylake CPUs.
Upon exhausting all options please consult EK knowledge
base at http://support.ekwb.com. Raise a question through
EK Support ticketing system if needed.
THE COOLER IS TOO LOUD
The EK-KIT Classic unit is equipped with fast-spinning EK-Vardar
high-static pressure PWM controlled fans that run at very high
speeds if the UEFI/BIOS is not set to control the fan speed. Make
sure to set control mode to PWM (instead of DC)! On the majority of
motherboards, this feature can be found in the ‘Hardware Monitoring’
section of the UEFI/BIOS. Please consult your motherboard manual
on how to change the fan speed.
Make sure the 4-pin PWM Fan connector is indeed
plugged in correctly into the appropriate FAN header
on your motherboard. Please consult Page 27, chapter
ELECTRICAL CONNECTIONS.