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