This setup is more than sufficient for Dolphin, you're more likely to be limited by software optimizations than by hardware.
You might want to consider replacing any one of your disc drives (which I think are a dead medium) with an SSD.
The recent Asus boards have a problem with overclocking the RAM, especially to 3000MHz. Until they release a BIOS update (if ever), this makes them inferior to other similar boards by MSI or ASRock, with my pick being the MSI Gaming M3.
You might want to consider the AMD R9 390 instead of the nVidia 970, as it boasts better performance and better compatibility with DX12. I personally would stick with nVidia, but it's an option you might want to consider.
The case also plays an important part in the cooling of the entire system, so don't skimp on that.
You might want to consider replacing any one of your disc drives (which I think are a dead medium) with an SSD.
The recent Asus boards have a problem with overclocking the RAM, especially to 3000MHz. Until they release a BIOS update (if ever), this makes them inferior to other similar boards by MSI or ASRock, with my pick being the MSI Gaming M3.
You might want to consider the AMD R9 390 instead of the nVidia 970, as it boasts better performance and better compatibility with DX12. I personally would stick with nVidia, but it's an option you might want to consider.
The case also plays an important part in the cooling of the entire system, so don't skimp on that.