There is also looking up the model number of your machine.
Usually the model number is on the front of the machine, simply saying "its a dell" does us no service.
Other than that there is speccy, cpu-z, NZXT CAM, HWinfo
Also keep in mind depending on how old your machine is the less RAM it can take, its best to research what hardware you have before doing anything.
If the machine is too old its going to be time to replace it, i mean you dont need state of the art hardware but anything pre 2004 is really pushing it these days due to the heaviness of a lot of modern OS's and 32bit OS support slowly being killed off it may be better to invest some of the money into a newer machine.
Anything post circa 2006 is still considered worthy by modern standards because at least you can run a modern linux on them as opposed to being stuck with windows XP and the hardware running like a slug with windows 10.
Anything that is capable of 64bit and can take at least 4GB of ram is acceptable
Edited by MadmanRB, 17 July 2018 - 01:06 PM.