All you need right now is more RAM and an SSD. Upgrade to 8 or 16gb of 1600, and get an SSD for your OS.
Are you really finding that your GPU/CPU are bottlenecking the system? A 7790 and a vishera should be plenty fine for many years to come.
if you already have a bunch of really nice peripherals (1-3 120hz+ monitors, nice keyboard/mouse, stuff like that), then you could benefit from upgrading
right now you should be able to run most games, maybe struggle a bit with the 7790, so I can see an upgrade to the GPU, but the CPU is fine for most things
unless you really need a reason to upgrade and need the super powerful processor and gpu, then there is no reason to burn the money. at most i would upgrade the gpu and the ram. if you're going to upgrade everything, go for 16gb of ram instead of 8gb
also, your 600w psu may or may not suffer a bit with that setup. i personally would upgrade it so it isn't having issues if you plan to go through with this
OH and i almost forgot, get an ssd as well
I agree, pretty much what I was trying to get at. The 7790 seems a little weak when it comes to some intensive stuff so if you really have the money and you want the extra bang for buck you can get a nicer card if you like.
All you need right now is more RAM and an SSD. Upgrade to 8 or 16gb of 1600, and get an SSD for your OS.
Are you really finding that your GPU/CPU are bottlenecking the system? A 7790 and a vishera should be plenty fine for many years to come.
the 7000 series was a bit of a cock up, 7790 made no sense, it was less powerfull than a 5770.
i agree on the gfx upgrade, moar RAM is the most important bit, otherwise the rest is fine.