is there signature that advertise your computer's specs?

yes, mine
now what do you mean by that? you can just list them. you're not allowed to have an animated gif, otherwise that would be a cool way to go.

Its going be awhile until i get my new computer built then i will puit them in my sig. but i thought there was some kind of sig thing online that were you put in your specs and makes a picture and includes your specs.

i don't know of any service, but if you PM me the specks or post them here and what you want it to look like, i will gladly make one up for you