1.35 per this thread:
On your advice, I recently bought 2 new RAM sticks of 8GB each, after much research.
In my machine, there is 1x8GB already installed, the Samsung M471B1G73DB0-YK0, according to CPU-Z - I bought two new ones of the exact same model.
Grounded myself after having turned off and unplugged. Simply opened up the back and found two empty slots. Kept grounded all the time.
Very easy to install, click and it was done. Put cover back and started up - black screen. Can hear the CPU but no keyboard light and only black screen.
I repeated safety routine and then removed one of the sticks. Tried to start again, same thing - black screen.
Repeated safety routine and then removed the second of my new RAMs, making it back to original - then it started fine.
What is the problem here?? Was looking forward to having a faster machine....I definately installed them correct. And they are the exact same as the one I have originally...
Appreciate any help, thanks!