You should note, the GPU appears to be Jasper’s major relevant revision, and it keeps the same huge heatsink found on the previous iteration—which is probably a good thing, actually. The other revision is that on-board memory stores NXE in the Jasper Xbox 360 Arcade. (It’s unconfirmed as to whether or not such is true in the 60GB models of the 360.)

To pick up a Jasper of your own, look through the hole in the Xbox 360 box. You need to spot the number of amps used by the 12 volt rail—not that hard, we promise. You can spot that right next to the 12V delineation. Since the new system uses 12 amps, look for this number to read “12.”

In other words, buy 12V-12 and everything is good. Buy 12V-14 and you are getting an earlier model. [Engadget]

According to Xbox Scene, the new 256MB chip will allow to install the entire new NXE dashboard without requiring the hard drive or any external flash memory unit. It will also allow you to store XLBA games, save gamesave information, or whatever you want. The rest of the motherboard layout stays the same, except for the RAM memory configuration, which changes from the previous version. [Xbox Scene]