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Old 12-23-2019, 12:31 PM
c-attack c-attack is offline
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Join Date: Jun 2014
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POST ID # = 1028351
c-attack c-attack Reputation: 122

You are never going to be able to use XMP (or AMD's version) with two different kits. You will have to manually set them. The higher you go, the more critical difference between them become. Unfortunately, I am not sure that Ryzen series had the strongest memory controller and there were a lot of obstacles for people. Two possible settings to try are:

2666 MHz
CL (CAS) 14
tRP/tRCD (RAS and RAS to CAS) 16
tRAS (Cycle) 35
Command Rate (CR/TR) 2 or Auto
DRAM Voltage 1.35

2400 MHz
CR 2 or Auto
Voltage 1.35

I don't know know your board lists the primary timings so I have written it both ways. Leave all secondary and tertiary settings on Auto. Just change the top 4. This is a bit voltage heavy, but you can run DDR4 at 1.35 until the end of time without temp issues, so this is the starting point. The other missing element here is VCCIO and VCCSA voltage. I have no idea what these should be for your platform and I don't use AMD. However, some quick searching should narrow it down or leave it on Auto for the first try.
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