What ot upgrade first CPU or GPU

[fleskj34]

My build is very simple and obviously i plain on upgrading everything at some point in time but for now i just wanna focus on one part at a time. The system runs well now but i would like to push it even further. It is for gaming purposes i don't really do any video or photo editing but would like to play power house games like fallout 4 and witcher 3 on very high settings(at some point in the future as i know just one upgrade my not allow these just yet).
my build is
CORSAIR CX series CX430 430W power supply

MSI Radeon R7 260X

AMD Athlon X4 860K Kaveri Quad-Core 3.7 GHz

1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

GIGABYTE GA-F2A68HM-DS2H FM2+ AMD Motherboard

and recently just purchased 8gb of RAM to upgrade from 4gb

also would a solid state drive work with my mother board and (being that this is my first build) would it be very hard to setup on computer with operating system already installed?

 

[TheSkyZX]

I would go with the CPU as it is cheaper to upgrade than a GPU. I recommend upgrading to an AMD FX 8350, but the socket type is AM3+... The choice is yours though.

 

[fleskj34]

I would go with the CPU as it is cheaper to upgrade than a GPU. I recommend upgrading to an AMD FX 8350, but the socket type is AM3+... The choice is yours though.

Good point but im not to tight on money so either one is fine to upgrade. I do like the looks and specs of that processor so ill keep that in mind if i can find a decent motherboard upgrade.