What Ram brand and model for Razer Blade 15

Difficult question, there are many good companies that make RAM.
The important question is how much money you want to spend.

Currently 2/2 Ram modules should be installed at DDR4 2666 MHz in idle mode (2x8GB) or?

Do you have a favorite brand of RAM manufacturers?
Kingston (HyperX), G.Skill, Corsair, or other

Then you can look for "CAS Latency (CL)" and MHz. (If that interests you)
How many MHz should the Rams own? Do you want to overclock the RAM?

greetings

If you ask me, I would buy the Ram modules:

Kingston-Technology-HyperX 32GB CL17 2933 MHz (in Idle Modus)

Kingston-Technology-HyperX 32GB CL20 3200 MHz (in Idle Modus)

I hope I could help you a bit...

greetings

chongyunxiang
Thanks! the 3200MHz means it's faster? And does it also mean it'll take up more battery?

The Rams are much faster (3200MHz > 2933MHz > 2666Mhz:D) the battery will not consume much more...

In my opinion, you will not notice a difference in battery power
If you want to overclock the rams, you will need little more volts (bios settings), but in idle mode there is almost no difference

greetings

It would be good if you can give me more detailed information. For example, the link of the Razer Blade or the name of the CPU & Motherboard.

Each CPU & Motherboard model supports different max. Memory Clock Frequency (MHz e.g. DDR4 2133, 2400, 2666, 3000, 3200 and others).

greetings

The CPU information is already sufficient. ;)
This CPU supports (DDR4-2666, LPDDR3-2133)

Click here > i7 9750H (Memory Specifications > Memory Types)

Then the RAM is in my opinion the best choice for a good price:
Kingston-Technology-HyperX 32GB CL15 2666 MHz (in Idle Modus)

greetings

I liked to help

greetings