Dual Channel in different size ram

[pedangpermata]

Hi, I trying to mix 8GB (CMV8GX4M1A2133C15) with 4GB (CMV4GX4M1A2133C15). When checked cpu z in memory tab it show as a dual channel, however in slot 1=Dual and slot 2=Single, what does it mean? why in slot 2 detected as a single instead of dual?

 

[Peter Martin]

I would not recommend doing what you are doing to anyone. Use matched pairs only for stability and performance. I wonder one of the sticks is SINGLE channel? let's google that.

 

[Kasper Jorgensen]

The ranks you see in slot#1 and 2 has nothing to do with single/dual channel. It's about the number of memory chips installed on the RAM stick.

 

[dvo]

most motherboards support asynchronous dual channel, allowing dual channel with unequal sticks. i have done this many times without any issue. its generally gotta be matching sticks, just with different capacities.

found a youtube video showing benches of single channel vs asynchronous dual channel
https://www.youtube.com/watch?v=jGcr4e2vvcY