Question Different RAM brands/models - how to choose?

[Faust-RSI]

They don't have all timings specifications, so I'm lost.
I need to upgrade my laptop memory from 16 to 32 Gb, so I found these (price difference is mostly negligible, however, I can get some faster than other):

Kingston DDR5-5600 Fury Impact/CL40/KF556S40IBK2 for 93,5 EUR

Kingston DDR5-5600 KVR56S46BS6K2 for 76 EUR (the seller is not clear either this is one module or two, however, this shop is walking distance from me and well known, others are kinda sketchy)

G.Skill Ripjaws DDR5-5600/CL46-45-45/F5-5600S4645A32GX1-RS for 100 EUR (not a fan of this brand, last year got totally broken RAM from them, they've changed it for free, but I lost around 1 month for the process)

Crucial DDR5-5600 CT16G56C46S5 for 90 EUR

Any thoughts?

 

[Lutfij]

need to upgrade my laptop memory from 16 to 32 Gb
What is the make, model and SKU to your laptop?

This is the only ram with a lower latency;
https://www.kingston.com/datasheets/KF556S40IBK2-64.pdf
with CL40, the others are CL46.

 

[Faust-RSI]

need to upgrade my laptop memory from 16 to 32 Gb
What is the make, model and SKU to your laptop?

This is the only ram with a lower latency;
https://www.kingston.com/datasheets/KF556S40IBK2-64.pdf
with CL40, the others are CL46.

Do I understand correctly that you were able to find the latency for another Kingston RAM and for Crucial? Many thanks, if so!

However, is the latency the deciding factor? I mean, if other timings are bad, can the latency compensate enough?

 

[CountMike]

Do I understand correctly that you were able to find the latency for another Kingston RAM and for Crucial? Many thanks, if so!

However, is the latency the deciding factor? I mean, if other timings are bad, can the latency compensate enough?

No, Cas latency by itself is not deciding factor as it has little performance influence but it caries with it other dependencies which do. It is usually also a measure of RAM and it's chips quality.
Laptops usually have restricted BIOS settings comparing to desktops so getting right memory right away is more important.

 

[Faust-RSI]

Laptops usually have restricted BIOS settings comparing to desktops so getting right memory right away is more important.

Exactly! I cannot edit any RAM setting in my laptop at all, so it's important for me to have good enough stock settings/timings.

 

[geofelt]

What is the make/model of your laptop?
Go to the crucial web site and access their ram upgrade advisor to see what upgrades are possible.
Pick a compatible upgrade.
If not from crucial, pick one with similar specs from a major brand.

Generally, speed is of little performance impact.
It matters more if you are using integrated graphics.

A motherboard must manage all ram at the same set of settings for speed, voltage and timings.
You will probably need to use what you have now. More capable ram will be dumbed down to what you now have.

 

[Bob.B]

Go here and run the scanner see what it shows.

Crucial

 

[Lutfij]

You didn't answer my question about the make, model and SKU to your laptop.
Not sure why my specs are not in any signature of my previous posts, but even if it's not there again - it doesn't matter.
I see you have it listed in your sig space but we advise users who frequent here to add their specs/info in the thread's body since sig space specs/info can and will change over time. When that happens, it renders the thread moot to the user in the same boat as you're in now.

OP, He is merely trying to help you. Please maintain civility.