Help me Making Dual Channel 2x4 gb ddr4

[Karimoff054]

Hi! İ have 4gb ddr4 cl17 ram and i have another slot so I want to make DUAL-CHANNEL (2x4 ddr4) but it should be comptable with the old one. so please advice me 4gb ddr4 ram for my hp 250g7 laptop which will  be compitable with my old ram . those are my ram properties:

[Paul_Tikkanen]

Hi:

If your notebook has an Intel 8th generation core or older processor, if you can get this memory in Azerbaijan, it should be compatible with the 4 GB memory chip already installed.

Crucial 4GB DDR4-2400 SODIMM | CT4G4SFS824A | Crucial.com

[Karimoff054]

I have found it

https://www.trendyol.com/pd/crucial/ntb-ram-bellek-4gb-ddr4-2666-mhz-cb4gs2666-p-100248904?boutiqueI...

it is cl19 but my ram is cl17 and it is 2666mhz and i dont know my ram's mhz will there be any problem?

[Paul_Tikkanen]

Yes, I believe that is the Crucial Basics memory chip and that should work fine too.

The 2666 MHz memory will automatically bridge to whatever speed your notebook's processor can run the memory at.

CL19 will bridge to CL17.

If you run the free utility that I zipped up and attached below, it will show you all the features of the memory HP installed.

If it has a CL of 17, it should be DDR4-2400.

[Karimoff054]

i used 2 applications cpu-z and that one u gave. both shows 2666mhz but task manager shows 2400mhz

[Paul_Tikkanen]

OK, that's fine.

HP installed a DDR4-2666 MHz memory chip that has bridged to 2400 MHz, CL17, which means your notebook must have an Intel 8th Gen core processor.

So, you will have two matching speeds of memory in both slots.

[Karimoff054]

but my processor supports maximum ddr4-2400mhz i watched that in 

https://ark.intel.com/content/www/us/en/ark/compare.html?productIds=137977

also is that good buy 2x4 or adding 1x8 to 1x4 and making totally 12gb ram? So dual channel or 1x4+1x8?

[Paul_Tikkanen]

I'd go 8+4 and have 12 GB running in single channel mode so that someday if you decide you want to install another 8 GB memory chip, you didn't waste your money buying a 4 GB one.

[Karimoff054]

no the next time i will get new pc with the best system. so that is my last upgrade for this laptop. 8+4 or 4+4? i saw the big fps difference in youtube test videos... there 50fps difference in games i will buy that for gaming

[Paul_Tikkanen]

I think 12 GB running in single channel mode would be a little better than 8 GB running in dual channel mode, but do what you want.

Good luck,