Question Core i5 6400 High CPU usage

[nitorinitori]

Hi everyone

My Core i5 6400 recently keep having high CPU usage / never sits below 20% even tho the temperature is around 35C to 40C.
It'll went down to 10%-20% usage when I don't do anything.

And then it went up to 40% to even 60% from just moving a cursor on Chrome.

I mostly work on lots of stuff, such as Photoshop and Autodesk Maya.
In Photoshop, it behaves like using a Pentium CPU, screen tearing / lagging while dragging an image.
And in Maya, the CPU usage sometimes goes up to 40%-50%, and when opening a menu, it'll just have certain milisec of delay, in anyway, it just feels really slow comparing to few months ago.

And then it'll go down to 10% when you go to desktop and hit F5.

I already make sure that the dust didn't clog the heatsink.

I'm still waiting for Ryzen 7 5700X to come out. I'm just wondering if changing the CPU will fix these issue.
Do you think it's typical for 4 years old CPU to be like this ?

EDIT : System Spec
Core i5 6400 2.7GHz | Asus H110M-E | 2666MHz Corsair Vengeance 16GB DDR4 (Clocked at 2133MHz) | GTX 1050Ti 4GB GDDR5 | 500GB WD Blue M.2 SATA

Thanks for any reply.

 

[mdd1963]

Are your clock speeds normal at 3.X+ GHz, or are you perhaps stuck at 800 MHz? (often indicative of botched /MS-provided default generic chipset drivers)

 

[nitorinitori]

Are your clock speeds normal at 3.X+ GHz, or are you perhaps stuck at 800 MHz? (often indicative of botched /MS-provided default generic chipset drivers)

I've run Intel's cpu diagnose app, when it throttle to 100% , clock speed went to 3.08GHz

 

[SkyNetRising]

Check cpu temperatures.

 

[nitorinitori]

Check cpu temperatures.

 

[nitorinitori]

Here's the video of when using Maya. It delays a sec even just switching tool.