What is better, 24GB of ram in one channel, or 16 in two?

Question

RAM

Greetings! Today I ordered a 16GB SODIMM RAM with one die, I now have 8x2, i.e. 16 in two channels, and when the die arrives it will be 24, I will remove one by 8 and add one that is by 16.
The performance will be worse than 16 in two channel? If yes, how much?

Answer 1

If 16GB is enough, then it will be faster than 16GB
; if it goes to the swap file, 16GB is not enough, then 24GB is faster

Answer 2

Worse.
In theory, 2 times, but in practice you will never get such a change. There may even be a 5% deviation.
IMHO, you rarely find applications that work with big data thrown into RAM.

Answer 3

16 in two channel is better

Answer 4

Depends on the task!
Typical applications will show a difference in performance on the verge of measurement noise of 1% -3%
Applications tailored to work with RAM such as an archiver, I tested 7zip, will give a difference of up to 7
% growth but there is no sense from it!
In my opinion, people have too high expectations for multi-channel, it's not worth it!
If the amount of RAM is critical, it’s better to let it be 24GB, in principle, 16GB is enough for the layman, and yes, no one bothers to buy another 16 later (carefully, the parameters of this memory bar should be identical to the first, and even in this case there are no guarantees that the dual-channel mode will be enabled, which is why there are positions in the price lists with several memory sticks tested for multi-channel mode at once)