I'm looking for a budget gaming pc that can play the latest games at 1080p on high settings. So will the AMD FX 6300 bottleneck 2-way crossfire sapphire radeon hd 7870, and how much wattage do I need to overclock this setup?
Bottleneck may happen on some games, but realise the fact that you have good configuration and you will get Solid Fps in every game you play. So don't bother about CPU bottlenecking !!. Since you had a duel GPU system, make sure you update the GPU drivers regularly for maximum performance and game compatibility. A good quality 600w or above PSU is required to run smoothly.