Hardware New RAM not detected

[Luckkill4u]

You should see the right key configuration on boot screen. F8, F12, DEL. It's usually one of those.
Edit: good chance it's F2, hold that button on boot until BIOS shows.

 

[migles]

It's the first time i do this, can you please tell me how to check the BIOS?

turn of the computer as soon as you press power, press DEL key
it should boot into a super secret menu

if DEL key doesn't work, try ESC, F1, F2, F8, F12

one of theese keys open up that "secret" menu, asus usually chooses DELETE key

 

[EmanueleBGN]

MSCONFIG > Boot > Advanced options... > ✓ Maximum memory > Restart your PC

 

[antiNT]

I am in the BIOS what should I do?

--------------------- MERGED ---------------------------

MSCONFIG > Boot > Advanced options... > ✓ Maximum memory > Restart your PC

It was not checked and when i check it, maximum is 4096

 

[FaTaL_ErRoR]

It's not going to work. You have the wrong ram. You need this.
http://www.crucial.com/usa/en/x54l/CT2530380
As stated by many members you need 1.3 v not 1.5v.
You need to package that stick up and send it back and hope for refund.
Then you need to purchase the correct ram. Counting pins and skipping proper voltage and ddr compatibility will result in wrong purchases all the time. Many of us learn this by reading other's failures. Some of us learn this by trial and error. (Me, well I learned this many years ago via trial and error....lol)
Best thing to do is to stop trying to make something work that will never work and purchase the correct ram. It happens to the best of us.
In the end you will be buying the correct ram.
The one you purchased will never be seen as it isn't powered up. (need different voltage) Big tip, always use a compatibility search on one of the manufacturer's websites. (like where I linked you to.) You would see that almost all of the x series asus laptops take ddr3L ram and not ddr3.
Lesson learned and it cost 24$ EU.