These are being sold as one lot.  There are 3x NUC6i5SYK and 1x NUC7i5BNK desktop mini PC's.  They each has ram, appear to be on 4gb stick.  There are slots for two dimms.  SSD's have been removed.  The SSD hold down screws are present.  I did not test these as I do not have a power supply.  Because of this I cannot offer a return.  Thank you