question about corsair vengeance

[reverentioz]

so im upgrading my RAM..or getting new ones to be exact..
Im just wondering what is better? a "Corsair Vengeance (Dual) 2x4gb ddr3 1600 CL9"
or a single "Corsair Vengeance 8gb ddr3 1600 CL9" will it be better to have a single 8GB ram or 2x4GB ram?(because in our place the single 8GB card is cheaper)
Also some help on this three...what's the difference?
Corsair Vengeance
Corsair Vengeance LP
Corsair Vengeance Pro

THANKS!

 

[Tradesman1]

2x4GB allows for dual channel use and a bit of a performance increase, with Corsair other than the various timings with in the sets (by freq) and occasionally the voltagees, basically the same except for heatsinks as long as the freq/timings/voltages are the same - some I've taken apart used the same ICs

 

[reverentioz]

2x4GB allows for dual channel use and a bit of a performance increase, with Corsair other than the various timings with in the sets (by freq) and occasionally the voltagees, basically the same except for heatsinks as long as the freq/timings/voltages are the same - some I've taken apart used the same ICs

Thanks for the reply!
so the 2x4GB is better..one more question, my motherboard only has 2 slots for ram..is that ok to put this 2 sticks close to ea other like that? will they even fit?

 

[Tradesman1]

Yes, it's made for a close fit