Asus X hero Z-370 wifi owner + 9900 ks just installed on latest bios 2103 and everything seems fine

5 ghz all core
load line level 6
cache @ 4.7 ghz
vcore = 1.28 v manual
ram @ 16 gb 4000 mhz cl-17
all power limits / ia dc load lines maxed and ia ac dc load line = 0.01

hard ware info 64 open and core temo logging

seems my 9900 ks on z 370 x hero needs

1.28 v load line= 6 manual vcore to pass prime 95 versionm 26.6 1344k test and 1.26 v for asus real bench

this is with 4000 mhz ram tuned tight and cache @ 4.7 ghz

adia 64 memory benchmnark said 59,987 k read , 60,4123 write 53,231 copy latency = 40.1 ns !

my 8700k did 5 ghz @ 1.28 v and 5.,1 ghz @ 1.355v no avx offset in prime 95 26.6 small ffts .

switching out 8700k for 9900 ks droped my memory latency from 42 ns down to 40.2 ns thats 2 points ! same exact settings

so long story short my 9900 ks and 8700k both need 1.28v for 5 ghz lol

should i keep it or go for better 1.28 v for 5 ghz all core ?

i heard z-370 needs 0.030 - 0.050 v more then z-390 to be stable is this true ?