Well i though about not replying and i think other might think the same after your comment above.
First i have the same memory chips, but i have 4 of them for 16 GB. These are the XMS memory and do not support XMP profiles unless your CPU bus voltage can be set to the 1.65 volts this memory is tested at. My K875 did not support this higher voltage correctly so it did not support XMP completely. You might want to check on that.
Noise from the PS would seem that it is overloaded and if not, then it is just cheap and not made well.