You can stop wondering what exactly is powering the new Zune HD . On the official Zune Insider podcast, host Matt Akers confirmed the rumors : yep, it's rocking a Tegra . No surprise, that announcement came with a heap of praise for NVIDIA's chip, so much so it's almost painful to listen. "So sick, so much better battery life, graphics acceleration. This thing is like a mini laptop in your hand, right, it's so awesome." We'll have to see about that for ourselves ( in September , maybe?), but we are indeed encouraged by the news. Hear it for yourself just below.[Thanks, Jon]