This new i9-9900 model does not exceed high temperatures before throttling occurs.
This new i9-9900 model does not exceed high temperatures before throttling occurs.
Do you know, as Phaaze88 mentioned earlier, that the 47 multiplier serves as the default boost clock for all cores on an i9 9900K? Based on what you've shared, you're getting the standard boost clocks, and everything appears to be functioning correctly according to your description.
Confirming the goal of achieving 4.8GHz across all cores. Currently, the system is consuming excessive power when adjustments or tests are performed without certain limiters. It remains stuck at a multiplier of 47. The aim is to find a minimal OC for initial testing.
You need to configure the per-core multiplier in BIOS and modify the voltages accordingly. You can assign a multiplier for each core individually, or set a single multiplier for all cores. As long as your CPU is initialized with standard BIOS settings, it will follow these multipliers regardless of cooling performance or additional power input.
The BIOS CPU setup is actually five times longer than before when I performed an OC. Previously, I only needed to check the multiplier, base clock, and voltage. This time I'm adjusting TJ Max to 95 degrees and prefer being more careful (though my comfort zone isn't 60 degrees).
There are a lot of great i9 9900K OC'ing guides online. And your motherboard is popular too, so I would think it's possible to find a good guide for your motherboard and CPU specifically.
I also took a few years off from OC'ing after having been OCing since the late 90s, and I agree, there is a lot of new stuff to tinker with in the BIOS or UEFI settings, it does take a little bit of focus to figure it out.
It seems I can achieve 4.9GHz across all cores, though that's quite high. The test in Prime95 hit 90 degrees during the toughest scenario. I’ll settle for 4.8Ghz on all cores and stop there. Air cooling should keep the overhead minimal anyway.
Of course, stability testing isn’t finished yet, but results are encouraging.
Minor adjustment reached the system's limit at 85 degrees and 4.9GHz. Continued testing Small FFT in Prime95 for two hours, remains stable. Will attempt again for three more hours if successful.
EDIT: Phaaze and Mads both contributed to my progress; both deserve a good answer, though Mads is still new so I'm passing it on this time.
EDIT2: It succeeded.