Help me Choose additional RAM

[qzydo]

I am planning to add another 4GB to my existing 4 GB DDR3 RAM for my laptop. My existing RAM is shown in the first figure and the most similar RAM I found from a local store is the second image. Will both be perfectly compatible....? I want to maximize performance.

I am having this now

click here

Thinking of adding this one into the free slot

click here

 

[Rocket_Jas]

You need to check wheather the ram can fit into the laptop (needs to be laptop size) and you also need to check wheather your motherboard has 2 ram slots. A quick bit of reaserch on your laptop and motherboard will find this. If it only has one slot you can replace your 4GB ram stick with an 8GB stick of the same frequency

 

[qzydo]

Anyone please, just have a look at the pics and let me know what you think. Will they be compatible. Apparently the CAS timings (??) are different, right..? will that be a problem, as I want to maximize performance