hi there
i got this second board rampage vi apex for a month after rma from ocuk shop.
i got many problem since day one..
first problem that i cant install or log to windows with default bios setting.
when i overclock it via ez tuning everything works ok!!
this problem happen with both boards

i lived with that for a month, but now another new problem came up.

one slot of ram cant be read and it hung the board and sometime it gives me this error code 6d if populate all rams sticks.
and gave me 53 error code if i tried the bad slot alone..

i tried one stick of ram on each slot, all working except one slot A_B i guess ..the one close to cpu left side.
the bios cant read it, neither windows can read but cpuz can read it..
inside the bios i notice a slot read different setting from others
also when i go to asus spd it can not read the size of the stick..

i tried manual timing/volt upped the volt to 1.36 , reset the bios nothing help me
i reaset the cpu and check the pins also cpu no problem

i tried everything i know, so i came here for a help maybe someone can give me a clue or a solution,,

my pc spec
7900x
asus apex x299 bios 802
4x8 gskill 3600c16
960 pro 512 nvme
nvidia 1050
evga 1000w 3g

thanx