i believe there is a utility program from MSI for overclocking....check it in msi page(find your motherboard->support->utility) you will find it easy...
the best thing you could do is to see if there is a store near you where you can see them and see how they fit in your hand...the most importand is how it feels at your hand and the all the others...at the end G500s seems to be better
first 3 long beeps is ram....secondly try the kingston hyperx in every ram slot and try to boot your pc...if it wont boot neither with each of 4 slots maybe your motherboard doesnt support 1600mhz...try with another ram to see
you dont meet the minimum requirements... i5 2xxxx is too much better than e6550...huge difference between them...you will need a better CPU if you want to run smoothly...you will need a better GPU also
My opinion for your problem is to go with a GTX 960...it's new with great performance...it will cover your demadings for sure,without a problem in the next years...its price is around 199$