Why that 6 core Core i7? Minecraft wouldn't use anything more than a dual core. 6 core would be better for multimedia encoding. Overkill for gaming: Gaming Benchmarks - The Intel Haswell-E CPU Review: Core i7-5960X, i7-5930K and i7-5820K Tested
Most of the difference in those benchmarks is due to the additional PCIe lanes. Just wanted you to be aware!
I would recommend a 1000W power supply. I have a similar nVidia/EVGA/MSI build and the 750W doesn't have enough juice to reliably run your DVD drive or an additional HDD with that geforce card. I upgraded to 1kW and now my terabyte storage and DVD burner never fail. Good luck!
Doesn't need anything more than 600W for that build. DVD drive will pull about 10W when reading/writing. HDDs use maybe 20W when spinning up at boot but at most use maybe 5-10W during normal use.
I have a 650W Corsair with an old power sucking Core 2 Extreme QX9650 (overclocked) and dual Radeon R7 265 in CrossFire. Runs without a problem.