Gskill memory, Which one is better?

I would go with the second one because of having the best price/performance ratio between them,it has the lowest voltage, 2nd lowest timings and 2nd cheapest option.

Hi.

2nd and 4th are the best but price/performance/features the 2nd option is the way to go.

^+1 #2

I would say #2 or #4 depending on the motherboard you have and what you plan on using this for.

First, make sure you mobo can actually handle 2000Mhz RAM before even considering #4. If it does then your secondary decision should be how performance-oriented this machine is going to be. If you need it to be 100% maximum performance at all times then bite the bullet and go for #4, otherwise... it's good ol' #2.