BIOS CPU speed not changing after overclock but changes in CPUZ

Mar 11, 2018
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I just build a brand new PC with the i7-8700k pairing it wih ASUS PRIME Z370-A motherboard.
I updated to the latest bios, 0613. After overclocking the CPU to 4.9ghz with 1.35v. Bios doesn't change the speed and remains at stock of 3.7ghz. But when I boot into Windows 10 and run CPUZ, it clocks to 4.9ghz when running high load such as After Effects or benchmarking at Cinebench R15. Why is the BIOS CPU speed still remain the same?

My Build:

i7-8700k
ASUS PRIME Z370-A
Corsair Dominator 2x8gb 3000Mhz
Corsair H100i V2
500gb Samsung 850evo SSD
Superflower Leadek II 750W GOLD

PLEASE HELP!
 
Solution
In BIOS it's running at near idle but when you load it in OS with heavy program it will ramp up. If you want to prevent that you would have to turn off all power saving modes.
Mar 11, 2018
2
0
10


how do i turn off power saving modes? from the bios?