RAM sticks of different sizes?

Question

Iron

There is a computer with 4 slots for RAM, 2 RAM are occupied, which operates at a frequency of 1333. It costs 2 for 4GB. They work with each other in a dual channel.
Are there any jambs when inserted into 2 free slots:
a) two more sticks of a smaller volume and a lower speed (2 GB each and a speed lower)
b) two more sticks of a smaller volume and a similar speed (2 GB each and a speed of 1333)
c) two more sticks of a similar volume and lower speed (4GB each and lower speed)
Will the dual channel stop working, will the speed of the other pair decrease, etc.?

Answer 1

You have 2 slots in the first bank and 2 in the second.
Today, memory controllers work very flexibly.
If you have the same amount of memory in bank A and bank B, you will most likely start a dual channel, the speed of the slowest memory chip. The timings will most likely be from her. (And yes, CL8 at 1333 is slower than CL9 at 1600) - and you probably won't even notice the performance change.

Answer 2

15 years ago, I would have been happy with any RAM =) in terms of volume - anyway. by speed - will work at the lowest frequency

Answer 3

It is always recommended to use bars from the same manufacturer and frequency.

Answer 4

If several bars are different, they usually sync successfully at lower frequencies and higher timings.
The dual channel mode will be disabled if there is a different volume, the speed of all the bars will be the same as the speed of the slowest one.

Answer 5

All bars in any case will work at minimum speed. Efficiency and dualchenel is determined empirically or according to the compatibility sheet of the motherboard manufacturer.
It may not work even with 4 identical modules.