I5-8400 reaching 100c

[Haiz02]

Recently I bought an i5 8400 with z370 tomahawk motherboard.. When I tried to stress the cpu for about 3 minutes it slowly reaches 100c on the stock cooler... I don't know if it is surpossed to be like that and ive already tried changing the thermal paste but it is still the same. Now.. Should I get an AIO cooler (ID-COOLING AURAFLOW 120) Or Air Cooler (CRYORIG H7). Which one is better that can fix this problem?

I5-8400
MSI z370 Tomahawk
8GB Galax Gamer III 2400MHZ
BitFenix Comrade with 2 fan installed (backt and front)

 

[rontonomo]

fyi the stock coolers are junk when running a cpu at 100%

 

[SkyNetRising]

Probably improper installation of stock cooler.
Cryorig H7 would be significantly better.

 

[feelinfroggy777]

Your cooler is not installed properly. The stock cooler will be fine and you dont need an aftermarket cooler for a locked CPU. Check and make sure that the cooler is seated on the IHS and the pegs are secured to the motherboard. Using too much thermal paste is just as bad as not enough. You only need about a half of pea size or the size of a grain of rice. It does not take much. Try resetting your cooler and adding new thermal paste. Remove the old past with a coffee filter and a little bit of isopropyl alcohol.

 

[geofelt]

----------------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, 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.
----------------------------------------------------------------------------------

 

[ryanpidd1991]

I'm having a similar problem with the I5 8400 I used in a build on Saturday. Everything has been running OK sitting at 50-60 idle (which I now know is too high) reaching 80-85 max when gaming. After loading up FH3 today the CPU hit 99c, which I then realised something isn't right. I tried reattaching the fan to be sure it was connected and I'm now getting 73c at idle. I'm going to put some new thermal paste on and get a friend to connect the fan (who knows what he's doing) later on. Should this solve the problem?

 

[SkyNetRising]

Should this solve the problem?

Could be. If you manage to install cooler correctly.