when you say 'computer graphics' are you referring solely to 3D rendered images, or do you consider photoshopping to be relevant as well?

the 'eve online' banner you have doesn't really seem to relate to computer graphics at all... it's got some rendered CG animations, but the site refers to an online video game... which except for the fact that video games are created with the aid of computer graphics artists, doesn't really have a valid tie-in.

as far as banner ads, you could always send a PM to one of the site administrators to see if they were interested in advertising on your site or becoming an affiliate.