cpu : i7 8700k mobo : Asrock z370 fatality k6 ram : Gskill ripjaws v 2x8gb 16gb dual 3200mhz cl16 - F4-3200C16-8GVKB
first install rams dimm A1 and dimm B1
upgrade latest bios 3.10
bios all default settings
pc not stable on aida64 / occt stress test , sometimes pc freezing in games
vccio 1.20v / vccsa 1.25v this voltages auto
try to lower vccio and vccsa voltages pc overclocking fail error post screen or unstable on windows
today i m 2-3 hour work for this problem fix ******
latest bios 3.10
remove dual tower cpu cooler , gone to waste thermal grizzy paste 
re install rams A2 and B2
motherboard XMP swich ON bios XMP on all bios setting default
vccio 1.20v auto , vccsa 1.25v auto
computer does not boot , bios error code 55 and 1-2 time error code 36 , sometimes pc boot all usb devices not working 
back to P1.80 bios nothing has changed bios error code 55 - 36 , freezing etc
oke relax 
again open pc case
the xmp switch on the motherboard is off reset P1.80 bios and all default settings set manual DDR4 3600mhz
set manual timings 17-18-38 2T others auto
DDR4 voltage : 1.350v manual
vccio voltage : 1.150v manual
vccsa voltage set : 1.250v manual pc working fine
this joke? low vccio voltage on 3600mhz rams working , XMP 3200mhz rams not working
here is my screen shot
https://i.hizliresim.com/r15Moa.jpg
my english bad i know.
UPDATE :
new bios voltage changes
vccio : 1.050v
vccsa : 1.150v
working fine
screen shot
https://i.hizliresim.com/7DavvL.jpg
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