When describing the (quite interesting, and well-described) "partially resident textures" technology, which is in turn inspired by John Carmack's MegaTexture technology, the review states:

For AMD’s technology each tile will be 64KB, which for an uncompressed 32bit texture would be enough room for a 4K x 4K chunk.

Isn't this off by a factor of 1,000? 4K x 4K is 16M texels, which at 32 bits per texel would require 64 MB. A chunk of 64 KB cannot hold that. They repeat the "64KB" value for the chunk size many times, not sure in what direction they're wrong, really. I guess if I kept up more with graphics tech, the answer would be obvious. :)