Question I want to upgrade my HP2000-2d02TU RAM by adding additional 4gb Ram with my previous 2GB ram

[Anonymous52662]

Already installed RAM SK hynix
2GB 1Rx8 PC3L 12800S-11-12-B4
HMT325S6EFR8A-PB N0 AA 1310
ON BLACK CHIP H5TC2G83EFR

THE TWO RAM I found online are
hynix 4gb 2Rx8 PC3L -12800S-11-12-F3
HMT351S6EFR8A-PB N0 AA 1248

THE Other one is
Hynix 4GB 1Rx8 PC3L - 12800S 11-12-B4
HMT451S6AFR8A-PB N0 AA 1334
ON BLACK chips H5TC4G83AFR

Please guide me for choosing the right ram
My friend told me 1st one is right but it's 2rx8 and in second one there are many other differences

 

[Alabalcho]

Memory maker sites like this one will tell you what memory modules are compatible with your computer. You can pull specs from there.