Memory modules of different size and compatibility?

If 2 straps: one 8GB, 4GB second, how will this affect the work and memory performance?
June 3rd 19 at 19:15
2 answers
June 3rd 19 at 19:17
If the memory of the same type, compatible.
If your motherboard allows you to put different size then compatible.
If the number of channels are the same, compatible.
Will work at the frequency of the least of them.
perhaps it will be easier)

https://market.yandex.ru/product/13792210?show-uid... +
https://market.yandex.ru/product/12794689?show-uid...
And the motherboard
https://market.yandex.ru/product/33178087?show-uid...
But I haven't bought one, but about this series - nikita.Stracke commented on June 3rd 19 at 19:20
that is compatible, but I found a strap with the same frequency. But if not, it is possible to take these, just the frequency of both will be 2400. - ara_Spencer18 commented on June 3rd 19 at 19:23
Thanks, yeah I'm probably just not those links thrown a glance, so of course I'm going to take all 2666 - nikita.Stracke commented on June 3rd 19 at 19:26
June 3rd 19 at 19:19
If 2 straps: one 8GB, 4GB second

Let's start with this.

So. It is necessary to consider such factors as:
Clock working clean RAM in MHz.
Operating clean in MHz. (if a single module works on, for example 1333MHz. And the other at 1600MHz, the work of both modules will be at 1333. Everything will fall into less).

how will this affect the work and memory performance?

But the effect is very simple. Press the start button computer. If start then praise something higher and it works. If something goes wrong, the computer does not startanet, or will not, put one of the modules.

I have everything ;)
Thank you for your attention, good.

spoiler
P/s
So everything is beautifully painted, don't want to remove ;)
Launched comments and saw links to products.
Based on the information released. Both modules will work on cleanliness "2400 MHz" as I wrote above.

Find more questions by tags MemoryIron