In Witcher 3 that's really doubtful that it's bottlenecking. That game is extremely hard on gpus at ultra, a 390 isn't going to pull 60 fps if you turn every slider to the right. You're probably best setting things to very high with a few settings at high. Also, Witcher 3 doesn't care how much vram you have. My 970 never goes above 1.8 GB at 1080p.
In Fallout 4 it's a definite cpu bottleneck. I run a Xeon E3-1231v3 which is really similar to your i7-2600 but about 15% more powerful, and I have to turn shadow distance and godrays to medium to get a locked 60 fps with my GTX 970.
The R9 390 isn't a card you can buy and just turn every slider to the max at 1080p. About the only cards on the market you can get away with that are the GTX 980 Ti and the Titan X. When you're hitting CPU limits turn shadows down a bit and draw distance being lowered helps too. I wouldn't bother with a cpu upgrade though unless you're willing to go big: e.g., i7-5820k + X99 board + 4 sticks of DDR4. But the i7-2600 is still a very strong cpu for gaming, and a really good match for an R9 390 to build a balanced system.
i7 2600 use LGA 1155 socket , this socket is compatible only with 2 & 3rd gen processor so' if you are not upgrading your mother board than 3rd gen is max for you, i will not recommend to do that because if you are wasting money right now to buy 3rd gen is not a good idea when market is filled with skylake processor. So' if you are ready to spend money on mother board than make your budget little bit loose and go for a skylake build.
personal view : i7 2600 is more than enough to handle your GPU or any upcoming hardware , i will not suggest to waste your money right now.
jonobang reacted to Maxisthemoose in what cpu?
