Running 5.0GHZ All Core OC, 1.45 vcore and HT disabled on the i9-9900k (HT disabled seems to give more FPS in all games I've tested)
I know vcore is high but, this is actually -70mv offset from the "auto" option on my motherboard for this clock speed, and it's stable and stays under 75c with my Peerless Assassin 120se
Running a GSkill Ripjaws V (SK Hynix Die) 2x16gb kit
Stock is 4000mhz CL18-22-22-42
I see a huge performance uplift running it at 3600mhz CL16-20-20-40
I'm not 100% sure if it's just the lower latency providing the performance boost or not, I've seen some people claim the i9-9900k struggles to keep up with 4000mhz memory
5.2GHZ all core is obtainable with HT disabled but, only with at or near 1.5v vcore which is too high for my liking and doesn't seem to translate into a real world performance boost
Could not get the ram to do 3800mhz cl16