Post your D3 system specs. Mine are simple but will do. I want to get an even better system but want to see how this one does first. It runs WoW and SC2 on max settings with good gameplay so I'm thinking D3 will run just fine. All the same, I worry about only having 4 gigs. I really want more. Windows 7 Home Premium AMD Phenom(tm) II X6 1055T Processor 4.00GB ATI Radeon HD 5700 Series 64-bit Operating Sytem Samsung LED Wide Screen SyncMaster PX2370 Use big bass stereo as sound for PC+Panasonic 55 inch Plasma which is hooked up directly to PC via HDMI I guess I could always go buy more ram if the video card suffices which I think it will.