8 GB single channel vs dual channel

If you are thinking dual channel means 2 rams then you have misconception about this,
single channel and dual channel ram are different kind of rams, (now-a-days we have even quad channel)
I buy 2x4GB or 1x8GB of RAM which one you find friendly to your budget
your ram is not so good but for gaming it is ok, raam dont have much impact on gaming, (get corsair Vengeance at same price but better performance)
for gaming even if you have a ddr3 1333mhz ram against corsair vengeance 1600mhz(2400mhz OC) the difference will be of 2-3 fps
 


crucial and other brands ram are ok for gaming, but if you want overall performance i would recommend corsair vengeance series
😉
 


The mobo is an Asrock U3S3/960GM and its desktop xd, sorry for the mistake. Just a detail, I have a Cooler Master Hyper 212 Evo, and one memory slot is just below the cooler, so the memory can't be much tall.

 


you can install corsair vengeance with your Hyper 212evo, even i have 212x which is slightly bigger than yours and i have 2 sticks of vengeance installed with no problems