Valhalla is the codename of the Motherboard used in the Xbox 360 Slim. It is the sixth motherboard revision. It no longer has Memory Unit ports. It has a special port for connecting the Kinect peripheral, which provides power to the device instead of plugging it in seperately. It also features a single chip that contains the CPU, GPU and eDRAM, with a 45nm die size. The Xbox 360 Slim, and as a result, the motherboard are much smaller than the original. It also contains an internal USB port which has a 802.11n WiFi card inserted. The HDD port was also changed, making it much smaller and flush against the case. The RRoD is also non-existant, replaced with a single red power light on any errors.