Cpu core speed fluctuates

[Poizin]

My Cpu core speed fluctuates like every 3-5 seconds from like 3711.72 MHz all the way to 2543.40 MHz and sometimes all the way to 1753.23 then goes back up in like 2-3 seconds and ever since i upgraded from a gigabyte GA-A320M-S2H motherboard to a gigabyte B450M DS3H motherboard my peformance hasn't been the same, the fps seems to be worse, my cpu is a ryzen 5 2600 i have 2x4gb ram 2666mhz and in the bios i activated the xmp profile but in cpuz it shows 1064.1 dram  frequency how do i bring the ram speed to its said speed

[Vishera]

2 hours ago, Poizin said:

my cpu is a ryzen 5 2600 i have 2x4gb ram 2666mhz and in the bios i activated the xmp profile but in cpuz it shows 1064.1 dram  frequency how do i bring the ram speed to its said speed

DDR doubles the speed so the the real speed is 2133MHz which is the minimum DDR4 speed,the XMP profile doesn't work?

When a CPU core is idling the clock speed goes down to save power.

You can disable AMD Cool & Quiet to force the CPU to stay at the maximum speed and voltage all the time.

[Poizin]

5 hours ago, Vishera said:

DDR doubles the speed so the the real speed is 2133MHz which is the minimum DDR4 speed,the XMP profile doesn't work?

When a CPU core is idling the clock speed goes down to save power.

You can disable AMD Cool & Quiet to force the CPU to stay at the maximum speed and voltage all the time.

How do i disable amd cool and quiet on my motherboards bios i switched back to my first motherboard which is gigabyte GA-A320M-S2H