I want to upgrade my laptop's ram but i have no idea what is compatible(HP 15)

[Asher11]

also rn in my laptop, i only have one stick of 4gb ram

[Paul_Tikkanen]

Since you have a 4 GB memory chip installed (I forgot your notebook only has a 4 GB chip and not an 8 GB one):

Your options would be to add another 4 GB memory chip in the empty slot and have 8 GB of memory running in dual channel mode.

Add an 8 GB memory in the empty slot and have 12 GB of memory running in single channel mode.

Add a 16 GB memory chip in the empty slot and have 20 GB of memory running in single channel mode.

I would spring for the most memory you are willing to pay for.

[Asher11]

Alr thanks

[Paul_Tikkanen]

Anytime. 

Glad to have been of assistance. 

[Asher11]

16 GB PC25600 DDR4 3200MHz 260 Pin Memory - CeX (UK): - Buy, Sell, Donate (webuy.com) so i just realised i have a voucher for this shop so im just gonna get it from here. are u able to tell me if this ram would work?

[Paul_Tikkanen]

The link you posted indicates:  

Oh crumbs!

We couldn’t find what you’re looking for.

I can't guarantee you what memory will work.

You need to make sure the memory has these specs:

DDR3-3200 CL22 1Rx8 or 2Rx8.

If the memory you want to buy has the above specs, then it should work.

[Asher11]

I couldnt find where 1rx8 was so here:

[Asher11]

would that work

[Paul_Tikkanen]

Maybe you can contact the seller.

It doesn't provide the number of ranks or the CL speed from what I can see.  Just states DDR4-3200.

Not enough info to determine if it may work.