PC Processors

[EduEyescar]

Hello!

I'm on my first month with a AMD CPU and, coming from a 4th Generation Intel, I tend my best to keep all my hardware in its safest conditions and monitor any possible issues.

As a newbie to this, I noticed that my Ryzen 7 7800x3d has increased its idle temperature from avg 45 to avg 50, while shortly after windows starts it spikes to 68 and had a max of 75c.

Rig:
Ryzen 7 7800x3d
Noctua NT H-2 Thermal Paste, applied in a 5-dot way as the brand instructs for AM5
Thermalright Phantom Spirit 120 Evo Cooler
2x140mm intake fans in the front (newer)
1x120mm exhaust fan in the rear (very old, already producing some noise)
1x120mm exhaust fan in the topside, REALLY CLOSE to the CPU Cooler (very old)

Conditions:
Room temperature ranges between 18 to 30c and when it's in its hottest, I've seen Cyberpunk going up to 75c from its usual 68c ever since I started

Some Temp Readings from MSI Afterburner :
Cyberpunk 2077: Average when cold day 66c, 75c when it's hot
Space Marine 2: Average 68c on both sitchs.

Worth mentioning I live in the Southern Hemisphere and we're getting close to what it's possibly one of the hottest summers. And I have no access to AC 

Questions:
1) How can I track any possible culprits, if there's any, as to why my CPU suddenly is having an increase in temperature?
2) Is my airflow setup needing any change?
3) Any reason to reapply the thermal paste?
4) Regardless of any possible issue, what is to expect from a 7800x3d in terms of behavior on idle and stressful scenarios such as a intensive game such as Cyberpunk, Space Marine 2

Please do let me know if you need any additional information

[elstaci]

First is the specs for your AMD processor.

It has a very high TDP Rating of 120 watts. You need a powerful CPU Cooler to keep from overheating past 89c it Maximum Operating Temperature.

AMD recommends a Liquid AIO for this processor.

By your temperature it seems as though your ThermalRight AIR CPU Cooler is doing its job of maintaining your CPU temperatures below it Maximum Operating Temperature of 89c.

According to a Tom's Hardware review of your CPU it has a TDP rating of 248 Watts which well enough to prevent your CPU from going over 89c under any loads: https://www.tomshardware.com/pc-components/air-cooling/thermalright-phantom-spirit-120-evo-review

So as long as your CPU Temps doesn't go above 89c your CPU is running under AMD recommended temperatures.

There many factors that can affect your CPU Temperature:

1- Overclocking the CPU making it go past your CPU Cooler abilities to prevent it from overheating.

2- CPU Cooler going bad or not correctly installed on CPU.

3- CPU Fans not working correctly or both fans or heat sink are dirty or dusty.

4- CPU Thermal paste is old and working as efficient as before

5- Poor Air Circulation in PC case ( Remove side panel and see if CPU Temps are slightly lower than normal)

6- PC Case fan is defective or dirty and dusty

7- PC Case air filters are dirty or clogged

8- Hot Ambient Room temperature - circulating hot air inside PC case.

9- Under powered CPU Cooler

Those are just some of factors that affect CPU temps.

In my case I installed a CoolerMaster Hyper212 EVO CPU Cooler rated at 150 Watts TDP  with dual fans on my new Ryzen 7 3700X CPU rated at 65 Watts.  The CPU was still going above 70c under heavy loads. So I switched one of the Fans with a very high CFM Fan (5000 RPM) in a PUSH-PULL configuration on the CPU heat sink. Now my CPU temps are below 60c under any loads (Ambient Room Temperature between 79F and 81f).

You might want to replace  your CPU Cooler with more high CFM fans which will make your processor run much cooler and also help increase high flow inside your PC case.

But personally, if the hottest your processor gets is around the mids 70c you really don't have a problem. The CPU Cooler is doing it job from preventing your CPU from going past 89c. 

But you can check the other factors I mentioned that can also affect your CPU temps.

Note: if your Room Temperature is 30c (86F) your CPU temperature is going run a few degrees hotter than normal since it is circulating warmer air inside your PC.