I currently have 16gb of ram, an i5, gtx 660 at stock clock and a samsung 840 evo what would be the best upgrade I could do? another gtx 660? i7 4790k? Another 840 evo in raid 0? RAID card?
Before you go get another gtx 660 make sure that your motherboard supports SLI and that you have a power supply with sufficient capacity to supply 2 gtx 660s (probably around 750w from a good quality power supply is needed). What power supply do you have now.
Also what CPU model do you have now? is it an i5 4670k?
I currently have 16gb of ram, an i5, gtx 660 at stock clock and a samsung 840 evo what would be the best upgrade I could do? another gtx 660? i7 4790k? Another 840 evo in raid 0? RAID card?
Before you go get another gtx 660 make sure that your motherboard supports SLI and that you have a power supply with sufficient capacity to supply 2 gtx 660s (probably around 750w from a good quality power supply is needed). What power supply do you have now.
Also what CPU model do you have now? is it an i5 4670k?
I have 750 watts and I think the i5 you mentioned is the one I have
What model/brand is that PSU? Some power supplies state a certain wattage but do not output it in the right places (need the power on the 12v rail for the mobo and GPU).
If you already own an i5-4xxx then there's no point upgrading the CPU. You could consider just getting one good card like the R9 280x or gtx 770 as an alternative to crossfire