Let us assume there are 4 slots for RAM in a given motherboard A, B, C and D. Slot A and C form a dual-channel and B and D form another dual channel. (They are of same colour physically.)
Now I have 2 similar RAM sticks of 3000 MHz running in dual channel. I am buying 2 similar RAM sticks of 3200 MHz (only available option for me now)
What would be the best configuration to get most speed in games from these?
p - 2 sticks of 8 GB (3000 MHz)
q - 2 sticks of 16 GB in proper dual channel configuration
r - 2 sticks of 8 GB (3000 MHz) and 2 sticks of 16 GB (3200 MHz) inserted in the 2 dual channel configurations respectively.
Check my profile for the only post I’ve made, I ended up choosing (and still currently running) r, but keep in mind that every ram stick has to be going the same speed, so you would need to downclock the 2x16 ram to 3000 mhz to match the 2x8
You also have to use the same timings, which may or may not work out.
Which means you may end up having to downclock both sets until you find a stable set of matching settings that runs on both.