What does DOCP setting changes to ram ?

[37748585862723896]

Does it only change main frequency and 1st 5 timing of ram ?

Anything else ? Since I have hard time booting with docp on with mixed rams

 

Seems easier to boot for me with docp off and tune the 5 main timing

[Yua]

DOCP with mixed rams is a big no no.

Its trying to apply timing profiles to rams that can have greatly different speeds or timing requirements.

You have to run them at the speed of the slowest ram stick in order to be reliable.

[RONOTHAN##]

1 hour ago, 37748585862723896 said:

Does it only change main frequency and 1st 5 timing of ram ?

Anything else ?

It can also change the tRRD, tFAW, tRFC, and tREFI timing if you have access to it (given you said DOCP and not XMP I'm guessing you're on AM4, in which case no, you do not have access to it). 

 

Mixed memory and DOCP aren't guaranteed to work with each other though, that's the issue you're likely to run into. Mixed memory in general is a nightmare to deal with and IMO should be avoided if possible.