Cpu temps are WAY too high despite good cooling

[Ponke]

Hi everyone, I’m new to PC building and could really use some advice. My CPU (AMD Ryzen 9 7900X) is running hot — around 90°C under heavy load and about 50°C when idling. I’ve done my best to ensure good airflow in my case (6 intake fans and 4 exhaust fans) and have mounted my AIO cooler correctly. I’ve also checked the thermal paste application, and it looks fine (yes, I did remove the plastic sticker from the AIO). Despite all this, the problem is still my cpu running hot. Any advice?

OS: Windows 11 64 bit version 26100
Case: Lian Li PC-O11 Dynamic EVO White
Motherboard: B650 AORUS ELITE AX ICE
CPU: AMD Ryzen 9 7900X 4.7 GHz 76MB
GPU: Gigabyte GeForce RTX 4070 Ti Super 16GB Aero OC
RAM: Kingston 64GB (2x32GB) DDR5 6000MHz CL36 FURY Beast RGB White

SSD: 2 of Kingston KC3000 M.2 NVMe SSD Gen 4 1024GB

Fans: 3x Lian Li UNI FAN SL120 Reverse Infinity RGB PWM White, 4x Lian Li UNI FAN SL120 Infinity RGB PWM White
AIO: Lian Li Galahad II Trinity SL-INF 360 White
PSU: ASUS ROG Strix Aura 1000W White
Bios: American Megatrends International, LLC, F30, 2024-05-22

[Hinjima]

30 minutes ago, Ponke said:

Hi everyone, I’m new to PC building and could really use some advice. My CPU (AMD Ryzen 9 7900X) is running hot — around 90°C under heavy load and about 50°C when idling. I’ve done my best to ensure good airflow in my case (6 intake fans and 4 exhaust fans) and have mounted my AIO cooler correctly. I’ve also checked the thermal paste application, and it looks fine (yes, I did remove the plastic sticker from the AIO). Despite all this, the problem is still my cpu running hot. Any advice?

OS: Windows 11 64 bit version 26100
Case: Lian Li PC-O11 Dynamic EVO White
Motherboard: B650 AORUS ELITE AX ICE
CPU: AMD Ryzen 9 7900X 4.7 GHz 76MB
GPU: Gigabyte GeForce RTX 4070 Ti Super 16GB Aero OC
RAM: Kingston 64GB (2x32GB) DDR5 6000MHz CL36 FURY Beast RGB White

SSD: 2 of Kingston KC3000 M.2 NVMe SSD Gen 4 1024GB

Fans: 3x Lian Li UNI FAN SL120 Reverse Infinity RGB PWM White, 4x Lian Li UNI FAN SL120 Infinity RGB PWM White
AIO: Lian Li Galahad II Trinity SL-INF 360 White
PSU: ASUS ROG Strix Aura 1000W White
Bios: American Megatrends International, LLC, F30, 2024-05-22

Hey, welcome to the forum. 
Your CPU is running exactly how its suppsosed to.  Ryzen 7000 CPU's run hot by design.

 

I helped someone with this exact 'problem' a few days back.

Please have a look through this, I am not going to write everything again

Check out the two videos I linked in this thread to learn more about how Ryzen 7000 temperature works.

 

[Timme]

Your CPU is running just fine for what it is. 

[Supersonicwolfe]

2 hours ago, Ponke said:

Hi everyone, I’m new to PC building and could really use some advice. My CPU (AMD Ryzen 9 7900X) is running hot — around 90°C under heavy load and about 50°C when idling. I’ve done my best to ensure good airflow in my case (6 intake fans and 4 exhaust fans) and have mounted my AIO cooler correctly. I’ve also checked the thermal paste application, and it looks fine (yes, I did remove the plastic sticker from the AIO). Despite all this, the problem is still my cpu running hot. Any advice?

OS: Windows 11 64 bit version 26100
Case: Lian Li PC-O11 Dynamic EVO White
Motherboard: B650 AORUS ELITE AX ICE
CPU: AMD Ryzen 9 7900X 4.7 GHz 76MB
GPU: Gigabyte GeForce RTX 4070 Ti Super 16GB Aero OC
RAM: Kingston 64GB (2x32GB) DDR5 6000MHz CL36 FURY Beast RGB White

SSD: 2 of Kingston KC3000 M.2 NVMe SSD Gen 4 1024GB

Fans: 3x Lian Li UNI FAN SL120 Reverse Infinity RGB PWM White, 4x Lian Li UNI FAN SL120 Infinity RGB PWM White
AIO: Lian Li Galahad II Trinity SL-INF 360 White
PSU: ASUS ROG Strix Aura 1000W White
Bios: American Megatrends International, LLC, F30, 2024-05-22

Ryzen7000 and onwards is known to try boosting to heighetst frequency below 95C. A behavior also found on Intel's recent CPUs 

 

The only way to stop that is using CEO mode (aka telling it to limit power to something like 60/90W instead going 120 for example) or undervolting or set your own PBO targets.