It will be able to run those games, though the dual core A4 6300 will hold back the GTX 970. Overclocking will help only a little since you are being limited by a dual-core CPU on games that require quad core or more cores to run smoothly.
You can upgrade the CPU to an Athlon x4 860k and overclock it to help the bottleneck, but even the x4 860K will somewhat limit a GTX 970, though a lot less than the A4.