Question CPU overheating on a new PC ?

[Jreal]

I just got a new system today and while benchmarking I noticed my CPU reaching really high temps and sitting at around 60 even when idle. I am using an Ocypus Iota L24 AIO Liquid Cooler. What can I do to reduce my temps?

 

[Lutfij]

Welcome to the forums, newcomer!

I just got a new system today
Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
BIOS version for your motherboard at this moment of time.

I am using an AIO Liquid Cooler from Ocypus called the Ocypus Iota l24.
How is the AIO mounted in your chassis/build?

Have you tried undervolting your processor?

 

[Jreal]

CPU: Ryzen 7 9700x
CPU cooler: Ocypus Iota L24 AIO Liquid Cooler
Motherboard: Gigabyte B650M Gaming Wifi
Ram: ADATA DDR5-5600 32 GB
SSD/HDD: AORUS PCIe 4 1TB NVME
GPU: RTX 5050
PSU: AORUS Elite P850W 80+ Platinum
Chassis: Ocypus Gamma C70 ARGB
OS: Windows 11
I am using the bios version of this Motherboard from 5/23/2025

This is how the AIO is mounted and I do not know how to undervolt my CPU

A

 

[Jreal]

New PC that my dad bought me seems to have a CPU that is overheating. As soon as I turn it on it immediately goes to 80 degrees celsius and drops to 50 when idle but quickly spikes op to 60 - 70 whenever I use a browser. Playing league of Legends on it alone takes it to 97 degrees.

Spec list is as follows
CPU: Ryzen 7 9700x
CPU cooler: Ocypus Iota L24 AIO Liquid Cooler
Motherboard: Gigabyte B650M Gaming Wifi
Ram: ADATA DDR5-5600 32 GB
SSD/HDD: AORUS PCIe 4 1TB NVME
GPU: RTX 5050
PSU: AORUS Elite P850W 80+ Platinum
Chassis: Ocypus Gamma C70 ARGB
OS: Windows 11

I have tried updating the bios to the latest version and I am gonna try to buy good thermal paste tomorrow and reapply it to the CPU to see if it helps

 

[Lutfij]

I am using the bios version of this Motherboard from 5/23/2025
https://www.gigabyte.com/Motherboard/B650M-GAMING-WIFI-rev-10/support#dl
So version F34?

Chassis: Ocypus Gamma C70 ARGB
How are the fans in your case hooked up? Do they ramp up when the temps go up on your CPU?

Please stick to one thread to help keep thoughts and suggestions concise.

 

[Paperdoc]

The central issue here is that the mobo has only ONE header for the CPU cooling system, and your AIO system needs two headers. There IS a good way to do this that makes use of some quirks of the designs of two fan types, but you need to do it a particular way.

I will refer to TWO manuals for that mobo. I expect you have the one called User Manual. If you do not also have the BIOS Setup Guide, see it here on-line

https://www.gigabyte.com/WebPage/917/amd600-bios.html

To start you need to buy a small 4-pin fan SPLITTER with three output arms, like this example

https://www.amazon.com/DARKROCK-Extension-Converter-Cable-Splitter/dp/B0CZ3KY4GK/ref=sr_1_20?crid=3T8EAMFK3WGCN&dib=eyJ2IjoiMSJ9.XIcjPsqh5kMCJ6oPLbKUVmQTa0RH_U2zG9uXCx41XORDYU4l78OYvPWjr0T6MIyQoppe_UpcFIJ7X42Cnl2qFv8_Yi6Ah7zqmIPoKOGQS08i83G-n1jdlUT4rz860owMBfFXhmYakEqUwVgPWxJqNQgQr1PPs5Yvrw4QqyF2V8k.-N2w1Buq7KHxzw03pLxPpVv6k5o42WuSn9yKSULDfik&dib_tag=se&keywords=fan+splitter+4+pin&qid=1755285657&sprefix=fan+splitter,aps,203&sr=8-20&xpid=F-0BhLxIYnZN6

That's a 2-pack. Note that this unit has only two types of connectors. It has one female (with 4 holes) that plugs into your mobo CPU_FAN header. Then it has three males (with pins) for plugging in your rad fans and pump. It does NOT have a third "arm" to connect to a power output from the PSU.

Use ONE if these units to plug the female into the mobo CPU_FAN header. Now look closely at the three male outputs. Only ONE of them has all 4 pins - the others are missing Pin #3. Plug the 3-pin male connector from the PUMP power cable into the only Splitter output with all 4 pins. It will not use Pin #4 of the output. That may seem counter-intuitive, but it is correct. The plug each of your two rad fan power cables into the remaining Splitter outputs.

You will need to make a couple of adjustments using BIOS Setup. See the manual I noted above in the middle of p. 2. Immediately after pushing the case Power-On button hold down the keyboard "Del" key until the screen shows the BIOS Setup opening menu (p. 4). Use the F6 key to jump to the Smart Fan 6 screen (p. 6). At upper left you should ensure it is showing you the info for the CPU_FAN header. The at upper right you can choose items to set, as follows:
Fan Speed Control to Normal
Fan Control Use Temperature Input to CPU (You may NOT have any options for this other than CPU)
Fan / Pump Control Mode to PWM, not to Voltage and not to Auto
Fan / Pump Stop DISabled so it never can stop the pump
Fan / Pump Fail Warning ENabled so any failure will be detected and an alarm issued.

When you have these settings made, use the Esc key back to the Main Menu, then the F10 key to reach the Exit Menu (p. 25). There choose Save and Exit Setup to save your settings and reboot.

When you set things up this way, here is what will happen. Power for the pump and both rad fans will be provided by the CPU_FAN header, and it CAN provide that power without any risk. The PUMP will always run full speed as designed. Its speed signal will be returned to the CPU_FAN header which will monitor that for NO speed indicating failure of the pump. If that ever happens you will get an on-screen alarm and shortly thereafter the system will shut down to prevent damage to the CPU when it has NO cooling. After that it may NOT allow you to start up if it still gets no pump speed signal, and you will have to do repairs. Under normal circumstances the system will operate well and cooling of the CPU chip will be automatically controlled by varying the speed of the two rad fans according to the actual temperture measured inside your CPU chip by a built-in sensor. The speed signals generated by the two rad fans actually will NOT be sent anywhere, so you will never see them and they cannot be montored for failure. So from time to time YOU just need to look at them and make sure both are working.

All this has nothing to do with the case ventilation fans connected to the two mobo SYS_FAN headers. It also is completely independent of the connection cables for the LIGHTS on the pump and rad fans, and in any case fans.