ram

[Abdullah99]

Hi i'm tring to upgrade my laptops's ram  i have a hp probook 4520s 

the ram i'm i want to use is 

http://www.kingston.com/datasheets/KVR16S11_8.pdf 

but when i press the boot buttun the laptop freezes a while and then the fan spin so fast and the screen remain black 

[Paul_Tikkanen]

Hi:

Your notebook only supports 2 x 4 GB of memory.

A single 8 GB memory chip won't work.

Make sure you buy 4 GB memory chips that are no faster than DDR3-1333, is 1.5V and has 8 little black memory chips on each side of the circuit board, not 4.

[Abdullah99]

okay thank you for that 

I have another one which is

4Gb 1R×8 PC3L - 12800s

Is that useable or not 

if I want to use it with another 2Gb ram which I Have right now 

[Paul_Tikkanen · Accepted solution]

You're very welcome.

You can try it but normally DDR3L-1600 memory won't go back two clocks.

Your notebook can only run memory at a max speed of 1066 MHz, and the DDR3-1600 memory usually only bridges to 1333 MHz.

It won't hurt anything if you want to try it.

In order to meet the DDR3 memory standard DDR3L (1.35V) memory has to run at 1.5V, but DDR3 1.5V memory will not run at 1.35V.

Your notebook runs the memory at 1.5V.