What is better 4+4 or 4+8?

Question

laptops

There was a comment that 4 + 4 will give + 10% performance, but it will turn out exactly 8800 RAM, and it seems like 4 + 8 is already 12.
Or did I misunderstand something?
And when choosing RAM, do you also need to select the cycle frequency one-on-one, or is it only the MHz that is the same?

Answer 1

If there is not enough RAM, it will slow down with any timings and with any frequency.
When choosing memory, look at CL - the numbers must match.