I Have a Dell Dimension 3000. ok, so my computer is about 5 or 6 years old. we ordered it through dell and it was shipped to use, didnt buy it from walmart or anything like that. well i went to use autocad 09 and it requires 1GB of RAM. i only had 256MB. so i was pretty sure my ram needed to be upgraded. i bought a 1GB stick of ram from ebay and put it in no less that 25 minutes ago. it makes a HUGE difference in the way my computer runs. but considering my computer is old, i want to upgrade pretty much all of it. here's what im wanting to upgrade. HardDrive(will probly by an external, so dont reallly need it) Graphics Card Processor Add a DVD rom to play dvd's/burn dvd's. ^^ Is there anything else i should look into upgrading? my question is, where to i start? what are good things to look at. here's what i have. Intel® Pentium® 4 CPU 2.80 GHz 2.79 GHz, 1.25 GB of RAM im not sure what any of that means but the RAM. what are some good things to look for as in Processor and things if that makes sense. i pretty much want to upgrade my entire computer instead of buying a new one lol.