I'm experiencing overheating issues with my AMD Ryzen 7 9800X3D. Most of the time, my PC sits at around 40°C when idle and goes up to 60°C during gaming, occasionally hitting 73°C during loading screens. However, in certain loading situations (possibly when shaders are compiling), the CPU temperature spikes dramatically to 95°C for a few seconds before the PC powers off. This only happens sometimes, but I can replicate it under extreme stress tests in OCCT (for both CPU and GPU). I swapped out my Hyper 212 cooler for a Thermalright Peerless Assassin and added an extra case fan (two front intakes, one rear exhaust). I've also adjusted the curve optimizer to -20. While my average temperatures have improved, the overheating still occurs during those specific circumstances. I've verified that all fans are properly oriented and functioning, and I've used thermal paste correctly, screwing the cooler down until it stopped moving.
4 Answers
It sounds like your thermal paste application might be off, or you could be over-tightening the heatsink, which can cause thermal paste to be pushed out. Just make sure you're applying about a pea-sized amount in the center and gently secure the cooler without excessive force. That should help keep temperatures in check.
I saw a similar issue mentioned in another forum where it turned out to be an eco mode setting on the power supply. It might be worth checking your PSU settings to see if it’s affecting stability.
Just a heads-up: the thermal shutdown threshold for the X3D CPUs is around 110°C, but if yours is shutting down at 95°C, it could be a different issue altogether. I'd recommend disabling the curve optimizer for now, just to see if that stabilizes your system. Also, review your memory settings (like XMP/EXPO) since they can sometimes cause such crashes.
Have you double-checked the orientation of the fans on the CPU cooler? I made a mistake once where the fan was blowing the wrong way, leading to really high temperatures. Also, ensure that if you're using a fan hub, it's connected correctly to the CPU_FAN header on the motherboard. All fans should ramp up together when stress testing!
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