Hi everyone,a little advice please would be much appreciated. I have a Titan Spinosaur intel i5 2500k 3.30ghz 4.60 ghz DDR3 Sandybridge System,GTX 460 GS, Asus P8z77-v LX and 4gb (2x2gb) corsair vengeance DDR3 PC3 -12800C8 1600MHz duel channel kit. It appears this ram is no longer available and I'm looking to up it to at least 8GB if nothing mixes with what I have if it will mix then probably go to 12GB so some advice on which corsair vengeance to get either to add to or all new duel kit. Thanks