How do i find what kind of dell computer i have?

I got an old dell computer but i have no idea what kind it is. i want to know what brand it is so i can upgrade it. it opens up like a book, and its black, inside the case there is a DATECH Cpu and a rage grapgics card its missing some ram chips, can some one tell me how i find what kind of dell it is so i can find the right information about it. please and thank you.How do i find what kind of dell computer i have?Hello,

When the system starts to boot, pay attention to what is shown on the boot screen. If the wording passes by too fast to read it, you can press the "Pause" key to stop it. Hitting "Enter" will resume the startup.How do i find what kind of dell computer i have?Man i have worked on those and i cant remember what kind it is but if it has serial or some kind of number on the back or model number you can look it up that way i know its a dell dimension i don't know what kind like 4550 or 8300 but i know its a dimension.