I want to upgrade my RAM to have the best performance (AN515-51)

ahmedfef

Hello,
as I wrote in the topic name. 
I want to upgrade the RAM of my Acer Nitro 5 (AN515-51) from 8 GB to 16 GB.
What I know is that, it supports up to 32 GB of RAM. (2133/2400 MHz) (Two Sticks)
But what I actually wants is to have the best performance.
So, I searched around and I found that.
RAM is depending on CL (Clock Latency), clock cycle time (depending on module speed in MT/s) and also the rank.
An article I found in official Curcial website came up with an equation to calculate the true latency of the RAM which is as following:

true latency (ns) = clock cycle time (ns) x number of clock cycles (CL)

So, I had a deep search and I came up with these three models:

1- Ballistix Sport LT 16GB Kit (8GBx2) DDR4 2400 MT/s (PC4-19200): CL16 - Dual-Rank

price: $139.00

True Latency: 13.28 ns
https://www.amazon.com/gp/product/B01DGOF6WS/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&psc=1

2- HyperX HX424S14IB2K2/16 Impact Black 16GB Kit of 2 (2x8GB) 2400MHz DDR4: CL14 - Single-Rank

price: $99.00

True Latency: 11.62 ns But Single-Rank (One-Channel) !!!
https://www.amazon.com/gp/product/B0722Q3243/ref=ox_sc_act_title_4?smid=ATVPDKIKX0DER&psc=1

3- Crucial 16GB Kit (8GBx2) DDR4 2400 MT/s (PC4-19200): (CL17 - Dual-Rank)

price: $92.99

True Latency: 14.11 ns
https://www.amazon.com/gp/product/B019FRDAY6/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&psc=1

After all this mess, I want to ask you what kind of these models you prefer ?
Is it really matter if it is a Single-Rank or Dual-Rank ?? (Keep in mind I am asking what changes to the performance I calculate above !!)
Also, if exist, I want a recommendation from you for another model which has a speed of 2133 MT/s or 2400 MT/s and low CL.

Model Number - AN515-51
CPU - Intel i5-7300HQ (Up to 3.5GHz)
GPU - GeForce GTX 1050 Ti
Current RAM - 8 GB - 2133 MT/s - CL15 - Single Rank (True Latency: 0.94 ns x 15 clock cycles = 14.10 ns)

MaClane

Good Morning ahmedfef !

It is common for more demanding users to choose to spend a little more by buying memory modules, by purchasing models with lower latencies that theoretically offer higher performance.

The latencies or timings of the memories represent the number of clock cycles that memory takes to deliver a die.
The different values ​​(CL, tRCD, tRP, tRAS and CR) represent the waiting times in certain situations, with row or column changes of the data (since the data in the memory are organized in the form of an array) or between different commands .

But in practice this final gain is practically nil in all applications, games etc ...
This is because the actual performance of a computer in a particular program depends on several factors, such as architecture and processor clock, video card architecture and clock, bus speeds, among many other factors.

The only situation where it may be worth using memories with higher specifications is in case you practice overclocking; in this case it is possible that more expensive memories "hold" higher clocks while maintaining stability.

Other than that, if you use your gaming equipment (or any other application that requires more RAM consumption) it is better to get 32Gb with any latency, time or rank settings and focus on the final maximum frequency.

If my device supports 2400Mhz, then get 2 banks of 16Gb each and it will have a much higher yield.