While the Oak Trail processor might offer Geekbench a slow ride due to its on-chip GPU, the Windows experience itself was far better than that of Andoid. Menus appear and applications boot with adequate responsiveness, and our Windows applications installed and ran as expected. And what Intel's latest 32-bit application processor lacks in raw performance it makes up for in power efficiency. With a thermal design power (TDP) rating of between 1.3 and 3 watts, we were able to browse the Web over Wi-Fi and perform other attended and unattended tasks for about six and a half hours on a single charge. That was with all Windows power-saving features enabled. Not quite iPad efficiency, but still not too shabby.