Hi, I have a few questions about the Optiplex 9020 USFF: 1) Would the following RAM’s fit this PC; Kingston HyperX (HX316C10F/4) 512M x 64-bit (4GB) DDR3-1600 CL10 SDRAM Crucial Ballistix Sport, DDR3, 8 GB,1600MHz, CL9 (BLS8G3D1609DS1S00) 2) Will I be able to fit an i7-4790S 3.2Ghz? It currently has an i5-4590S 3Ghz installed. 3) I am interested in upgrading the graphics card in the PC, but I understand this can be difficult due to the small size of the PC. What graphics cards would be compatible, and do I need any extensions/adaptors? Many thanks, EKHL