They just released the 4th & final installment... It's interesting to skim through -- I don't know how many people will want to read every word of what many will consider trivia -- & if you've been at this stuff a while, it can make you feel old... I started out feeling nostalgic, remembering different milestones, different cards & how a few were really great for their time, but then the number of models, advancements, & more to the point, Years hit home. :(
http://www.techspot.com/article/650-history-of-the-gpu/
http://www.techspot.com/article/653-history-of-the-gpu-part-2/
http://www.techspot.com/article/657-history-of-the-gpu-part-3/
http://www.techspot.com/article/659-history-of-the-gpu-part-4/