I want add RAM for our server HP Proliant DL380 G6. There are no HP's shop in my country. Some computer & server shop offer me Kingston RAM for my server. But my boss says "Only HP!".
What's difference between official ram and global ram?
HERE's HP's comment on the matter. Basically you can use non-HP memory but there are caveats.
Technically speaking, there's no difference. Practically speaking, though, HP will likely refuse to perform any warranty work on the server if non-HP RAM is installed or at the very least, will require you to remove the third-party RAM and reproduce the problem before they will help you.
Hmm, where did you buy the server from? Couldn't you purchase from the same place? It's quite possible to order HP RAM from a variety of sources. Either way, there's no technical difference between HP RAM and Kingston or Crucial, etc. There's likely a cost difference, with the HP RAM being potentially more expensive than the alternatives, but in general, it's relatively inexpensive these days.