Ram upgrade

[MuseOfTime]

So, i recently got my first computer for my birthday. And i noticed alot of things require more ram then i have useable (i have 8gb installed, 5 usable) would upgrading the ram be possible/ would it void my warrenty and, if not which is better, 2 sticks of 8 gbs, or 1 stick of 16gb, it says it has a motherboard limit of 16, i have no idea how any of this works

[Prométhée]

Hello
the rule is, you do not damage anything, you replace the computer in the original configuration, and normally no worries, for the warranty:

HP PCs - Damage Not Covered by the HP Standard Limited Warranty | HP® Customer Support

 24-dd0010 Product Specifications

Motherboard Specifications, MonkD

8 GB DDR4-2400 SDRAM (1 x 8 GB)

• Dual channel memory architecture
• Two DDR4 SODIMM (260-pin) sockets
• Supports up to PC4-19200 (DDR4-2400)
• Supports 2 GB, 4 GB, and 8 GB DDR4 SODIMMs
• Supports up to 4 GB on 32-bit systems

  note:

  32-bit systems cannot address a full 4.0 GB of memory.

• Supports up to 16 GB (unbuffered) with two 8 GB DIMMs on 64-bit systems

you can possibly help yourself from this site, also:

Welcome to Crucial USA

You must install a module as close as possible in case of addition.
Because sometimes the two modules are not compatible with each other

so you can try to add an 8gb module to upgrade to 16gb
but if that doesn't work, you may have to buy the same new module