I built a new system with all brand new parts, and when I perform a CPU stress test the temps go to 100ºC immediately, like seconds after CPU Usage goes to 100%, and then just stay there for the entire test with Intel XTU giving me the "Thermal Throttling" warnings. Cinebench R23 30min Stability Test completes just fine and gives me a decent(?) score of 26408 pts, it just thermal throttles for the entirety of the test.
The first obvious thing to do was checking the thermal paste and pump mount, so I took it out, verified that the thermal paste was evenly distributed (it was, CPU perfectly covered) and then re-applied it also making sure to really tighten the screws this time. In doing so, I realized I hadn't tightened them as much the first time, so I was feeling quite confident that that was the issue... but nope. Once again, even after a cold boot as soon as CPU usage goes to 100% the temps jump to 100ºC and begins thermal throttling.
Here is a CSV export of all sensors from Intel XTU during the 30min Cinebench test: https://sharetext.me/pbc0pr1mgy
Look at how it jumps from idle 28ºC to 100ºC in like 7 seconds: View: https://i.imgur.com/4jpG9Gh.jpeg
Summary
The first obvious thing to do was checking the thermal paste and pump mount, so I took it out, verified that the thermal paste was evenly distributed (it was, CPU perfectly covered) and then re-applied it also making sure to really tighten the screws this time. In doing so, I realized I hadn't tightened them as much the first time, so I was feeling quite confident that that was the issue... but nope. Once again, even after a cold boot as soon as CPU usage goes to 100% the temps jump to 100ºC and begins thermal throttling.
Here is a CSV export of all sensors from Intel XTU during the 30min Cinebench test: https://sharetext.me/pbc0pr1mgy
Look at how it jumps from idle 28ºC to 100ºC in like 7 seconds: View: https://i.imgur.com/4jpG9Gh.jpeg
Summary
- Re-applied thermal paste, and REALLY tightened the screws
- Thermal paste was evenly distributed when I took it out the first time.
- Idle temp 27~31ºC
- It's a cold day ~14ºC
- Brand new system (0 dust)
- Fully tested other components (RAM, SSD, GPU), no issues
- Manually set Pump and Fans speed to MAX
- No OC other than enabling Memory's XMP profile (same behaviour with XMP disabled)
- Not just Cinebench, same behaviour on Intel XTU stress test
- Cinebench R23 MultiCore 30-minutes test: 26408 pts
- Top-mounted radiator:
View: https://i.imgur.com/Ixmv7rr.jpeg
- CPU: Intel Core i9-12900K 3.2 GHz 16-Core Processor
- CPU Cooler: Gigabyte AORUS WATERFORCE X 240 60.07 CFM Liquid CPU Cooler
- Motherboard: MSI PRO Z690-A WIFI DDR4 ATX LGA1700 Motherboard
- Memory: Kingston FURY Renegade RGB DDR4-3600 32GB (2x16GB) CL18
- Memory: Kingston FURY Renegade RGB DDR4-3600 32GB (2x16GB) CL18
- Storage: Western Digital Black SN850 2 TB M.2-2280 NVME Solid State Drive
- Video Card: Zotac GeForce RTX 3070 Ti 8 GB GAMING AMP Holo Video Card
- Case: Fractal Design Meshify 2 Compact TG Light Tint ATX Mid Tower Case
- Power Supply: Corsair RMx 850 W 80+ Gold Certified Fully Modular ATX Power Supply