(Help)Problems With Memory Speed

[Jed78]

Hi All

I have recently purchased some new memory, well actually everything is brand new however I seem to be having problems getting the memory to run at the advertised speeds. I have purchased Corsair's 2 x16gb (32GB) DDR4 Vengeance LPX 4000Mhz. I would like to run it as close to the 4000Mhz speed as I can but I cannot get the system stable with anything over 3100Mhz which is really frustrating me at the moment. I have only tried using the 2 XMP profiles on the motherboard at present including manually lowering speed until stable. Would anybody be able to let me know if i am doing something stupidly wrong.

Many thanks

My Specs are

CPU: 9900k
MOBO: Asus z390 Hero XI
Cosair 850w Psu

images of my settings

 

[Jed78]

Thanks I'll give this a bash. Pretty sure it's not my OC as I had same problems when running defaults but I will try again to be sure. I'll have a play with those voltages you mentioned. Never really had to play manually with Ram before as the XMP had always worked previously before so I'm a bit nervous but if I remain cautious i should be ok I guess.