I just opened the laptop and found an M2 NVME SSD instead of a 2.5 SSD. The laptop is quite stable but not overly fast. Hence bringing me to my previous query would just a 8gb suffice ?

 

Image uploaded for your perusal.

 

The specs on the Amazon site says

Onboard RAM upgradeable upto 12GB RAM

However sometimes you can go past that.
If you use 3200 then it should slow to 2400.
Computers run on the slowest ram.
Where did you get the 2400 speed from?

 

Try this.

SSD & RAM Upgrades | Crucial.com

Use Crucial's SSD and RAM compatibility checker for your PC or system. Select your system to find compatible upgrades.

www.crucial.com

 

Hello PeterOz ! Thank you for replying. I went thru a lot of youtube videos yesterday and all pretty much pointed to 2400mhz and then I checked on this site, it said the same
VivoBook 15 M509DA Memory Upgrade - ASUS 15 M509DA VivoBook Laptop Memory (memorystock.com)
There was a command prompt that I ran yesterday said the max ram supported should be 32 gb, wmic get memphysical get maxcapacity. Not sure if this is ok

 

ASUS M509DA | SSD Upgrades | Crucial.com

Info from Crucial

 

This from ASUS. If on board 4gb then upgrade is to 12gb.

ASUS M509 - Tech Specs｜Laptops For Home｜ASUS Global

Detailed specification of ASUS M509 Tech Specs，Color:Peacock Blue|Slate Gray|Transparent Silver|Red、Color:Slate Gray|Transparent Silver、Operating System:Windows 10 Home - ASUS recommends Windows 10 Pro for business|Windows 10 Pro - ASUS recommends Windows 10 Pro for business|No preinstalled...

www.asus.com

But as per post #4 you can sometimes pass the specs. It may take more then 12.

 

That processor you have supports ram
at
PC4-19200 (DDR4-2400) Memory
see here
AMD Ryzen™ 3 3250U | AMD
System Memory Type
DDR4
Memory Channels
2
System Memory Specification
Up to 2400MT/s

if you try and use ram that is faster than that at its base speed there is every chance it will not work
The 2400 refers to Mega Transfers per second
often expressed as 2400 MHz

Whilst I agree that sometimes you can install more ram than shown on the Asus spec, that is sually when there has been a firmware update to allow such.
That is unusual when one of ram "sticks" is NOT a slot but a presoldered - ram chip to the system board.
As yours is.

Personally if it were me I would go with Asus spec that as posted says max ram with 4GB pre soldered is 12GB
12GB with 4GB standard (soldered)

I certainly would caution you against buying ram from anywhere that suggests you can use more than an 8GB stick or faster than the shown spec. UNLESS from somewhere where it wil be refunded without question, if it does not work

This one will do you fine
Samsung 8GB DDR4 PC4-19200 2400MHz SODIMM NON-ECC Unbuffered 260pin 1.2V CL17 Single Rank. Compatible memory for VivoBook 15 M509DA
VivoBook 15 M509DA SAMSUNG 8GB DDR4 PC4-19200 Laptop SODIMM SINGLE RANK DDR4 Memory RAM Module - Best Price SAMSUNG 8GB DDR4 PC4-19200 2400MHZ SODIMM NON-ECC UNBUFFERED 260PIN 1.2V (memorystock.com)

I urge you NOT to buy the value brand at £17.95.
Samsung chips are far more reliable than some value brand chips

 

Thank you so much for the replies. Will certainly go for the 8gb chip. Unfortunately, back home the component supply chain restricts itself to recent/current tech. i.e. 2400 MHz availability is an issue and warranty claims are nonexistent. 3200 mhz would be easily available and in a wider variety.
Will keep you posted.
Ciao.

 

YOU may be OK
It will likely run at the CPU speed of 2400
Only trying it will tell

 

Sure ! Will let you know. Thks