probably wouldn't boot up.
Listen If your brand new laptop came with 2666Mhz RAM preinstalled, then order the exact same RAM that came preinstalled.
Are you afraid to open a HP Support ticket?
Because they can answer all your questions and doubts since they are the ones that manufactured your laptop.
I can't find hynix (the same model)in Greece i buy crucial more 4gb ram tottal 12gb.in hp forum said that crucial is combatible for HP laptops.thanks again and sorry for so many questions
Have a good day.
Look, you can purchase whatever RAM you want.
I already gave you all the information you need to decide.
So if you want to purchase Laptop RAM that runs at 2666Mhz go ahead.
You are trying very hard to rationalize buying 2666Mhz RAM so why bother, just go ahead and do want you really want to do.
I won't be replying any more to this thread because you are not reading or understanding the information I am giving you.
Take care and Good Luck!