Whizz

My current PSU (Coolermaster MWE 750 80+ Gold modular) Is causing the PC to shutdown while gaming and is going to be replaced soon, but while i still can run the PC for normal usage i noted a thing: When the PC is fully shut down, a very annoying hissing/whizzing sound comes from the PSU itself...

I have 16gb of 1600mhz ddr3 . I have a Samsung evo 500gb ssd. How fast will I be able to make the ssd? How much system ram will I have to allocate to it? Thanks