CPU is running hotter than normal

jmiserlian01 · Jan 12, 2018

So I had to replace my motherboard because my first one was bad, and now my CPU is running hot. I replaced the thermal paste because the first time I added too little, but redoing the thermal paste didn't make it any cooler. It used to run at about 35-40 degrees celsius idle and 65 while playing games. Not it runs at about 50 idle, and up to 75 after playing games for a short amount of time. The CPU cooler feels like it is on securely. However, when it gets hot the air coming out of the computer still feels relatively cool. I have 3 intake and 3 outtake fans. What could be causing the high temperatures?

CPU: AMD Ryzen 1700, stock cooler and Noctua NT - H1 thermal paste.

lumineZ · Jan 12, 2018

And this just started to happen without you doing anything to the computer? You have not moved it, tweaked around with voltage settings or bumped into the case etc etc?

jmiserlian01 · Jan 12, 2018

lumineZ :

Well it happened when I installed a new motherboard

lumineZ · Jan 12, 2018

So straight away after you installed the new motherboard the temp did rise?

jmiserlian01 · Jan 12, 2018

lumineZ :

Yeah, I didn't check the tems right away, but as soon as I did it was running hot

lumineZ · Jan 12, 2018

1. Are you sure you did apply the thermal paste correct?

2. Are you sure cooler is mounted correct?

3. What are your voltage readings during idle and under 100% load?

4. Are the CPU cooler fan running at the correct speed?

cryoburner · Jan 12, 2018

It's also worth looking at whether the new motherboard might have some auto-overclocking feature enabled. Do you have any idea if the CPU is running at the same clocks and voltage that it was before?

I believe some Ryzen systems also were reporting temperatures wrong, so it might be worth checking whether a BIOS update or something is needed.

jmiserlian01 · Jan 12, 2018

lumineZ :

1) I am pretty sure I did. I made a dot in the middle about the size of a pea.

2) I mounted it the same way I did before, it doesn't move when I try to move it, and the screws are in fully

3) idle voltage is about .94V and under 100% it is 1.4V according to aida64, and hwinfo says it is still .94 but that's probably off. After about 30sec of stress testing it got up to 78 degrees, but the heat sink temp only got up to about 40 degrees using a laser thermometer. (35 when idle)

4) the fans seem to be running at the right speed, and speed up when it gets hotter.

jmiserlian01 · Jan 12, 2018

cryoburner :

Oh geez the motherboard has it set at 1.438 volts for some reason, at 3000mhz. I turned it down to 1.2V and the temperatures are much better, thanks!

lumineZ · Jan 13, 2018

Yea. Your volts where high.

Reason is simple:
It is the down the motherboard manufacturer to set Vcore and they will normaly set that high to make sure that every CPU that gets dropped into the socket will work.

jmiserlian01 · Jan 13, 2018

lumineZ :

Ahh ok, thanks for your help!

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