Thanks for posting the screenshots. It really helps with assessing your problem.
You say "just some 3D text" but I presume this is extruded 3D text using the Ray Traced render option in After Effects.
Unfortunately, your AMD display card does not allow GPU acceleration of After Effects Ray Traced rendering, with the result that you will see ridiculous render times like those you are seeing. The AE Ray Traced render engine is extremely slow without exactly the right display card - see the System Requirements here.
If you are using AE CC you may wish to explore the Cinema 4D integration with AE.
Otherwise, you can fake 3D extrusion by manually building a stack of identical layers in a precomp, or using a script that does the stacking for you.
Ok thanks, I'm trying out some of those scripts now.
Also what CPU would you recommend? I might be able to get one after Christmas.