Corsair is an excellent PSU brand and 650 watts is way too much compared to what your components need.. No point going higher.. In fact, there will be no harm if you could step low and get the Corsair VX 550W.. It'll work like a charm.. As for the RAM issue, refer to your board compatible memory list and pick one accordingly.. Not to say that other modules won't work, it is more like a safe and sure approach..
Try running your BIOS with reduced settings.. Turn OFF Turbo and don't run memory at XMP settings.. Your motherboard specs show support for 1600 MHz memory without any overclock.. So irrespective of CAS timings, it should work without a problem..