Is it necessary that a system have equal no. of memory channel & memory slots?

[Alqama]

what is your name

[Stahlmann]

When you have 4 slots, but only 2 channels and have RAM in all 4 slots, you don't get any speed advantage from using more than 2 DIMMS, only more capacity.

 

Rule of thumb: If you have 2 channels, use at least 2 DIMM's for optimal performance. If you have 4 channels use at least 4 DIMM's and so on...

[Helpful Tech Witch]

24 minutes ago, Alqama said:

Is it necessary that a system have equal no. of memory channel & memory slots? what happened if the system consist of one memory channel & two memory slots, and two memory channels and two memory slots? does it affects the system's performance?

Some mobos wont keep BIOS settings if you have 2 dimms in single channel. i was having problems and needed to reset the bios every time to troubleshoot my [problem.

[Moonzy]

41 minutes ago, Stahlmann98 said:

you don't get any speed advantage from using more

You do get some advantages

Spoiler

 

 

[Haro]

All consumer cpus (lga1151,1200,am4(pga1331) ). Have 2 memory channels. Having 4 sticks would mean that 2 dimms per channel. That wouldn't and doesn't have any bandwidth increase (at least nothing noticable). And it would have little to no performance increase. 

53 minutes ago, Alqama said:

what is your name

No. 

[Mateyyy]

11 minutes ago, Moonzy said:

You do get some advantages

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Well, yes and no. There is a very slight performance increase because the tested two stick configuration (2x8GB) is still single rank, if you were to use say 2x16GB, so two dual rank modules, you'd see no difference by adding two more 16GB sticks. 

But still, it's good that you pointed that out to see the difference between single and dual rank, however small it might be.

[Moonzy]

37 minutes ago, Mateyyy said:

difference between single and dual rank,

Just watched buildzoid's video about it

Do you know how well ryzen 3000 memory controller deals with dual rank memory?

Can it reach 3600mhz most of the time?

[Mateyyy]

6 minutes ago, Moonzy said:

Just watched buildzoid's video about it

Do you know how well ryzen 3000 memory controller deals with dual rank memory?

Can it reach 3600mhz most of the time?

I remember watching him talk about it but honestly it's really vague. I think he was saying that dual rank works great on Zen 2 but I'm not sure about the clocks.

If I had to guess, 2x16GB 3600MHz should be doable on the vast majority of Zen 2 IMCs out there, even on like entry-level B550/X570 boards. 4x16GB though, not so much I reckon.

I guess you just made me rewatch his video on it then haha.