Question I7 4790 utilising only half of its TDP at stress test and 100c temp

Jun 4, 2023
So, i don't know why but my pc is utlising only 36watts~ at stress test. Temp shot up to 100 celcius in a minute and cpu utlisation is avergae 3.29ghz (90%). Pc had not been used for a while, and just bring out to start.
specs are - I7 4790(stock cooler), h81ms mobo, 16gb ddr3 and gt710. psu 450watt (corsair)

At idle temp stays at 47, and with all the tabs (around 100~ in chrome), temp hovers around 60c. Voltage utilised is 0.9~1.07v in hwinfo.

Ran the stress test at cinebench with pc scoring 3898 score, and cpu is around 3 year old. and if it matter, it was instant 100c temp in beginning due to uncorrect seating of cooler (not sure if it still is placed correctly). My main issue is it normal for half tdp usage, 100 temp in a minute and 90% utilisation?
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The intel stock cooler is not the best for a 4790 under full load.
You might want to replace it if your case permits.

Here is my stock text on how to install a stock cooler.
The key is to push down on diagonal pairs of pins:
----------------how to mount the stock Intel cooler--------------

The stock Intel cooler can be tricky to install.
A poor installation will result in higher cpu temperatures.
If properly mounted, you should expect temperatures at idle to be 10-15c. over ambient.

To mount the Intel stock cooler properly, place the motherboard on top of the foam or cardboard backing that was packed with the motherboard.
The stock cooler will come with paste pre applied, it looks like three grey strips.
The 4 push pins should come in the proper position for installation, that is with the pins rotated in the opposite direction of the arrow,(clockwise)
and pulled up as far as they can go.
Take the time to play with the pushpin mechanism until you know how they work.
Orient the 4 pins so that they are exactly over the motherboard holes.
If one is out of place, you will damage the pins which are delicate.
Push down on a DIAGONAL pair of pins at the same time. Then the other pair.
When you push down on the top black pins, it expands the white plastic pins to fix the cooler in place.
If you do them one at a time, you will not get the cooler on straight.
Lastly, look at the back of the motherboard to verify that all 4 pins are equally through the motherboard, and that the cooler is on firmly.
This last step must be done, which is why the motherboard should be out of the case to do the job. Or you need a case with a opening that lets you see the pins.
It is possible to mount the cooler with the motherboard mounted in the case, but you can then never be certain that the push pins are inserted properly
unless you can verify that the pins are through the motherboard and locked.

If you should need to remove the cooler, first run the cpu to heat it up and soften the paste before shutting down and powering off the pc. That makes it easy to unstick the old cooler.
Turn the pins counter clockwise to unlock them.
You will need to clean off the old paste and reapply new if you ever take the cooler off.
Clean off old paste with alcohol and a lint free paper like a coffee filter.
Apply new paste sparingly. A small rice sized drop in the center will spread our under heat and pressure.

It is hard to use too little.
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