Intel Turbo Boost doesn't seem to be working or, at least, I don't have a way of confirming that it's working. I tried monitoring core clock speed with both CPU-Z and Intel Turbo Boost Monitor, while running Prime95 one-core benchmarks and gaming. It never exceeds 2.8 GHz (i5-8400).
Troubleshooting steps I've tried:
-confirmed that I have the latest BIOS version and Turbo Boost is Enabled in BIOS
-confirmed that Windows is in High Performance power mode
-ran Intel Processor Diagnostic Tool, all tests were passed, detected 2.7 CPU frequency
-installed Intel Extreme Tuning Utility. Confirmed that it shows Turbo Boost as "enabled". Ran a benchmark and it still shows MAX frequency at 2.75GHz
My question is: is there any way to confirm that Turbo Boost is working? All benchmarks and monitoring tools show 2.7 GHz clock speed at all times under heavy load (yes, including 1-core tests). I'm starting to believe that Turbo Boost is not working. In that case, is there any way to troubleshoot it?
https://pcpartpicker.com/b/FPKBD3 (i5-8400, ASRock z370m-ITX, GTX 1080, 16GB DDR4-3000, Corsair SF450W, Win 10 Home)