Hey folks, I'm reaching out for some advice regarding the temperatures I'm seeing on my Ryzen 7 5800X3D paired with an ARCTIC Liquid Freezer III Pro 360. Currently, I'm monitoring temps of around 87°C at full load and up to 75°C while gaming. Given that I have a 360mm AIO, these numbers feel a bit on the high side to me. My PC has a solid airflow setup with 6 intake fans and 1 rear exhaust, and I've mounted the AIO as exhaust. I've double-checked the installation several times, using different thermal pastes like the one that came with the cooler and GD-900, but the temperatures haven't changed much. Also, I don't have PBO enabled in the BIOS, and I've ensured the cooler is securely mounted. I've heard that sometimes thermal paste issues or cold plate contact can impact temperatures, so I'm wondering if that might be the case here. What do you all think? Are these temps typical for a 5800X3D, or should I be worried about the cooler or contact issues? I'm open to any suggestions or solutions!
5 Answers
My experience with a 5500X3D is similar; it hits 91°C during stress tests on a 240mm AIO. Undervolting has helped me reduce temps by 10°C. Give it a shot!
Don't blame your AIO for the heat. These chips are tough to cool down. Undervolting by about 20-30mV might help lower your top temps by 5 to 10 degrees. It's definitely worth a shot!
Try setting your pump speed to a constant 80%. This helps longevity and can assist with temperature spikes from heavy loads.
The 5800X3D and 7800X3D are known to run hot due to the 3D cache placement. An 87°C max temp isn't as alarming as it sounds. If that's your worst case, you're okay!
Thank you! That makes me feel way better; I guess I just expected lower temps for an AIO.
It's pretty normal for the 5800X3D. 90°C is the chip's limit, and with the dense heat focused in a small area, it's tough for any cooler to manage it completely. You're seeing typical behavior, especially under heavy load. Just enjoy your CPU!
Thanks! I really wasn't aware of how hot this CPU can get.

Thanks for the tip! I'll definitely give undervolting a try.