Sorry for the late reply as only just got my PC running and installed with Windows, and thanks for the helping hands.
Ok so it turned out not to be the RAM, it was the Motherboard that was the issue.
Swapped that out and jobs a good un.
Only issue was with Windows 11 asking me to chnage my PIN due to hardware change via the internet BUT...
Couldn't get online with the ASUS network socket to change it.
TIP:
Had to use a USB to Network adaptor which did the trick.
Now rocking:
I9-13900K
Asus Hero Z790
RTX 3080 FE
32gb Of Vengance Black @ 6000mhz
6gb of NVMe (980 on the Boot and 2 x 970's)
All Sexy and Water Cooled, 360 and 240 rads, Halo fans.
Lian-Li Smoked Glass case
Dactyl Manuforms Printed by me - Deep Black and with Blank Keycaps
Logitech MX Mouse
TOTALY LOVING IT - going to bed it in for a couple of days and then start to overclock it.
Again Many thanks