I was just wanting to make sure this was all compatible. I am 99% sure it is but its always good to check. If you have any suggestions for the build they are welcome. I already have the psu, optical drive, and HD btw.
AMD APU- A10-5800K
RAM-4GB G.SKILL Ripjaws X series DDR3
Case-Cooler master elite 431 Plus
Should be all good as long as you have a strong enough psu, if you want you could aim for more on the ram since you have the ability to go much higher on speed and amount but that depends on what you intend to do with it.
For clarification could you post the details on your psu?