Hello, I have this board and my Dell 5150 has run perfectly since I received it 6 years ago. Now, I would like to upgrade the processor. I have a SL7Z9 Intel Pentium 4 630 Socket 775 3.0 2M 800 CPU and I also have a X300 D3A27 Video card (A ATI Radeon X300SE). 305Watt (H305N) Power Supply. I am wanting to possibly have quad core and an HDMI video card. Now the bad part. I am not a dummy, but I am a Mac Person from the beginning of Apple. I do understand PC's and Windows XP and the removal and replacement of components. However, I don't know what goes with what. I don't want to FRY the computer as it has worked great since I bought it. Thanks for your help in advance and sorry PC guys about me being a Mac Guy. Brad.