When the Jasper motherboards started showing up in Xbox 360 consoles late last year there was reason for excitement -- quieter fans, more efficient design, and 256MB of internal storage to set gamers free of overpriced memory cards. Now the systems are receiving an unannounced storage boost, as noticed in the new Japanese Arcade model sported a 4Gb (gigabits) Samsung NAND chip. That's twice the size of the old one, giving the equivalent of a 512MB internal memory unit. That first system was manufactured in April, and they're starting to hit US Arcade units as well.