I built my own custom PC about a year ago, but I've been having a recurring issue lately where it overheats on the first boot. The CPU temperature shoots up to 90-100°C and the system shuts down. After that, it usually boots fine and runs at normal temps. This problem seemed to go away for a couple of weeks, but now it's back, and even trying multiple boot cycles doesn't help. When I manually set the fans to max speed, the temperature drops significantly, but the noise is pretty loud. Can anyone help me understand what's going on? Here are my specs: Gigabyte B650 Eagle AX motherboard and a 7800X3D CPU.
5 Answers
This may actually be covered under warranty for your custom build, so consider checking that out before you start opening things up. Messing around with it might void your warranty, so be cautious!
From what you've described, make sure your BIOS fan control is set correctly. You can often manually set fan speeds for post/boot too, which might help right up until everything stabilizes. Just be careful with the settings to avoid overheating immediately on boot!
It sounds like your AIO cooler might be failing if you have one. If the thermal paste and seating are fine, you might just need to replace the cooler. Also, have you checked your motherboard's BIOS settings to make sure all the fans are recognized and configured correctly? Manual controls like you're using are a good temporary fix but look into fixing the underlying issue too.
Have you used any monitoring software, like HWInfo? It’s free and can give you details about how well your fans are spinning and at what RPM. That might help diagnose if there's a fan issue right out of the gate.
Sounds like you've got a cooling or sensor issue rather than a problematic CPU. You should check the following: 1. **Thermal paste/cooler contact:** This can degrade over time. If the cooler isn't properly seated or if the thermal paste isn't applied well, it won't transfer heat efficiently. 2. **Fan control settings:** Dive into your BIOS to check the fan curves. Ensure that the CPU fan is ramping up quickly on boot. Sometimes fan headers fail and don’t respond as they should. 3. **Temperature sensor:** Firmware updates can mess with temperature readings. Updating your BIOS and using monitoring software like HWInfo could help confirm if the readings are accurate. 4. **Dust accumulation:** A simple layer of dust can block airflow and impact cooling. Based on your fan adjustments making a difference, I'd recommend reseating the cooler, reapplying thermal paste, and adjusting your BIOS settings to get a solid grip on the issue.
I actually use GCC for my fan settings and typically have it on manual with a decent curve. As soon as I can get into the app before it shuts down, maxing the fan speed cools it down enough for it to stay on. But switching back to any presets causes the temps to spike again.