Question I need help with running ram at it's rated speed ?

[gautamshrm554]

I've had 8x2 gb cl18 (3600mhz) of Corsair lpx vengeance sticks which keep crashing at xpm enable and after a couple of boot attempts they booted at 2666mhz(default) so I replaced them with the below-mentioned stick.

I installed a new 1x16gb cl16 (3600mhz) ram and exact same thing is happening.
I managed to get them to boot with XMP disabled and manually increase frequency to 3266mhz at 1.40V on auto timing. I was able to do the same with the previous pair of ram sticks and nothing has changed. I need a solution desperately, any help would be greatly appreciated.
Spec:-
R5 5600x
Aorus b550 pro
RX 6750 xt
Corsair cv650

 

[Lutfij]

Corsair cv650
That is not an ideal PSU to have in a build. It's a rebadged VS unit which was similar in nature to the green labelled CX units from Corsair, years past. How old is the unit at this point?

Aorus b550 pro
What BIOS version are you currently on for your motherboard?

I've had 8x2 gb cl18 (3600mhz) of Corsair lpx vengeance
Got a link to the rams you're working with? If they are two sticks of ram purchased separately over a course of time, please pass on the PCB revision numbers for the two sticks of ram. Which slots are the rams populating on the motherboard?

I installed a new 1x16gb cl16 (3600mhz)
Got a link to that too?