I\'ve been reading several references like \"X is GPU accelerated\" and \"Y is not GPU accelarated\", but I can\'t find a full list. What exact parts of CSS
There is no CSS3 specification that discusses anything about GPU acceleration. Instead, it is up to each browser maker or the company that implements the browser on specific hardware to decide which parts of CSS3 they will use the GPU for. And, this can easily change from one device to the next.
For example, as of about a year ago (I don't have more current info), 3d transformations were GPU accelerated on an iPhone3, but not 2d tranformations. But, I would expect that that info could be completely different for the iPhone3s or iPhone4 or future iPhone5.