Different RAM sizes

[Henrique Louro]

Hi guys.
I have a question that i really need help with.

I currently have in my desktop a single 16GB DDR4 RAM 2666mhz from Corsair and i want dual channel.

If i buy 8GB DDR4 RAM 2666mhz from Corsair will i be able to get dual channel?

Thanks

[Eigenvektor]

For dual channel, sticks should be the same size (and speed etc.)

 

It's possible with 16+8 the RAM will run in mixed mode, so half of your 16 GB stick will run dual channel with the 8 GB stick and the rest will run in single channel mode.

[krakkpott]

3 hours ago, Eigenvektor said:

For dual channel, sticks should be the same size (and speed etc.)

 

It's possible with 16+8 the RAM will run in mixed mode, so half of your 16 GB stick will run dual channel with the 8 GB stick and the rest will run in single channel mode.

Ain't this limited to Intel CPUs & chipsets only? And as I heard, performance will be worse once you get past the dual channel threshold.

[Haro]

9 hours ago, Henrique Louro said:

Hi guys.
I have a question that i really need help with.

I currently have in my desktop a single 16GB DDR4 RAM 2666mhz from Corsair and i want dual channel.

If i buy 8GB DDR4 RAM 2666mhz from Corsair will i be able to get dual channel?

Thanks

You most likely will just make sure the cl latency is the same 

[Eigenvektor]

4 hours ago, krakkpott said:

Ain't this limited to Intel CPUs & chipsets only? And as I heard, performance will be worse once you get past the dual channel threshold.

Apparently some AMD systems do, too. Not saying I recommend it though. Even if flex mode works, only half the memory will work in dual channel (or two thirds rather).

 

@op, like I said above use two sticks with the same size, speed, latency, etc.