It appears that the race for the graphics crown is on again for the two main rivals. nVidia's NV40 and ATI's R420, their latest project-wonders, are about to be unleashed upon the gaming world and the task facing each company is simple, be the first. The latest news suggests that the NV40 taped out in late December, consider the average 4 months needed from that stage to actual shelf presence and we could have new nVidia boards by April 2004. It will however, be a race for nVidia to secure boar…