Hi, so i had a gigerbyte mb and athlon x4 cpu, and a amd hd6500 gpu with 16 gb 13333 ram, ive upgraded to g1 sniper mb, haswell i7 3.5 ghz cpu and a gtx 770 gpu, i reused the ddr3 13333 16 gb ram, should i get another 8gb ram at 13333 ghz so i have 24gb or should i get 16gb of 1600ghz new ram. and not use the 13333 ghz. also i was thinking of getting an ssd and another titan cooled gtx770 to sli, is their any other upgrade which i need, ive also got 600 w psu.