We have a dell inspiron 530 with 4 gigs of memory. Windows 7, 64-bit. DDR2. Intel processor with integrated graphics. We have already upgraded the power supply and want to upgrade the motherboard and processor. We have made multiple attempts at installing different graphics cards so the boys can play DOTA 2 but have no luck. Once installed the computer monitor goes straight to power saving mode and will not come out of it. So, my teenage sons wants to learn how to build a new computer using the exisiting tower with the new NVIDA graphics card and power supply that we have. Any suggestions are greatly appreciated.