Hi SeanWHall, Thank you for providing the specification of the computer. The Dimension E520 can support minimum of 256 MB and maximum of 4 GB of RAM; you can go ahead and upgrade the video card which supports 300 watts power supply. Once 4 GB RAM is installed go ahead and install windows 7 64 bit the system can very will support this OS.
Hello, I have been searching the Internet for many leads but have come up, empty handed. I am new to these forums, so I am not sure whether or not this is the correct area to be posting this in. I have been looking to upgrade my old computer an Dell Dimension E520 to a more powerful computer, so it is able to run 3d based programs without an hint of lag. I have looked into getting new computers, but I'd rather upgrade the computer I have, so I can use it for a few more years. My system specifications are as follows: Computer: Dell Dimension E520 OS: Windows 7 Ultimate x86 32 Bit Bios: 2.04 Processor: Dual Core Intel Pentium D CPU 3.40GHz Current Ram: 2Gb Graphics Card:  NIVIDIA GeForce 7300 LE (512mb) Power Supply: 300 Watts Bios Screen:   [IMAGE] (I hope this is enough information)  and I would like to upgrade the ram to make use of the two extra slots so I can get 8Gb's and also upgrade the graphics card to an. Although something I really want to know, is if the dell Dimension can handle the windows 7 64 Bit or do I have to go down to a lower OS? Also has anyone done this before and does anyone have any advise for a suitable graphics card that will not overtax my power supply.  Thank you for reading, any help would be most appreciated.  Sean Hall. 
Dell E520 - Possible upgrades?