turbo boost not working

My CPU cant boost to 4.6 in single-core with all core is activated but when I disabled other cores in bios, it can boost to 4.6. I tried different power plans in windows, default bios setting, none of these can solve this problem. mobo: MSI Z370 a-pro

So I ran 2 runs of Cinebench R15 and I monitored during browsing and normal system usage but my X5650 achieved 603Cb in R15 and never goes above 2.8GHz on all cores. My turbo is supposed to be 3.06GHz and I remember a while ago achieving 685Cb in Cinebench R15. I haven't changed anything in...

Hello I have HP Laptop with i5-8250U, (Base 1.6ghz, 3.4 turbo boost) Configurable TDP-up Frequency 1.80 GHz 8GB ddr4 ram, nvidia gpu (2 gb ddr5) My problem is that when i render video in premiere pro with laptop "turbo boost not working". All the time laptop render in 1.6ghz. I had apply...