I just built my computer everythings fine the computer runs great but for some reason i go onto CPU-Z and it says that only 2 cores are enabled and that my ddr4 ram from crucial (2x8gb @2400mh) is running at 1200mh and only 7.46gb is usable??
1700 @ 3ghz
AsRock Fatality gaming K4 motherboard
2x8gb Crucial (AMD Supported) 2400mhz
Well DDR4 2400 is actually only running at 1200mhz. Being DD (double data) you get 2 transfers per clock, hence 2400 rating. Check to make sure your RAM is in the right slots A_2 and B_2, refer to your manual, this is a common cause of memory not being useable.
try enabling all cores in the bios. sounds like they got turned off. i suppose asrock has the same ryzen setting as asus does.
oh and yes make sure you have cpuid 1.79 or newer or it wont show correctly