AMD: Xbox 720 graphics will look like Avatar

[Hynad]

Soleron said:

Krusnik said:
@Soleron
how did Nvidia screw Sony over exactly?

1. Because the GPU they showed up with was slower than the Xbox 360's GPU (from AMD) but was not cheaper to license
2. Because failing G8x GPUs in laptops cost Sony millions of dollars in refunds and replacements
3. Because Nvidia's Tegra that the PSP2 was meant to be based did not fulfill the performance and power consumption numbers Nvidia promised so that design had to be scrapped and redone leading to a significant delay in its launch date. Sony clearly wanted to launch before the 3DS.

Can you provide any sources for all this?  Especially point 3?