dual channel w/ different sizes

[TheBean]

if i have a 1x16gb stick with 1x8gb stick, will it work in dual channel? i want to do this in a laptop which comes with 1x16gb but i want dual channel (1x16 is expensive)

 

[PineyCreek]

They need to be the same size. Most every document says the roughly the same thing as this clipping from Intel:

 

https://www.intel.com/content/www/us/en/support/articles/000005657/boards-and-kits.html#dual

 

[TheBean]

is there a way to set a limit to how much the system can see? then i could limit the 16gb stick to 8gb and then use another 8gb stick. sort of what you can do with cpu cores by disabling them. 

[Lord Letto]

yes you can use a 8GB & 16GB stick in dual channel (assuming speed & timing is the same/work together), it's called flex mode:

https://www.intel.ca/content/www/ca/en/support/articles/000005657/boards-and-kits.html

The 8GB stick & the lower 8GB of the 16GB stick work in dual channel while the remaining (upper) 8GB of the 16GB stick would be single channel.

 

[TheBean]

7 hours ago, Lord Letto said:

yes you can use a 8GB & 16GB stick in dual channel (assuming speed & timing is the same/work together), it's called flex mode:

https://www.intel.ca/content/www/ca/en/support/articles/000005657/boards-and-kits.html

The 8GB stick & the lower 8GB of the 16GB stick work in dual channel while the remaining (upper) 8GB of the 16GB stick would be single channel.

 

does that work in laptops?

[Lord Letto]

4 hours ago, saksham said:

does that work in laptops?

it should.

[TheBean]

19 hours ago, Lord Letto said:

it should.

how would i enable that? and how will i know if i am running in flex mode?