Just cross-flashed my P6TD Deluxe with the P6X58D Premium 0813 BIOS.

Some issues I've run into:

- USB 1&2 default to a USB 3.0 controller that does not exist on the P6T line, making the devices connected to them non-funtional, and the system unstable until the devices are moved. I've disabled the USB 3 controller, but haven't checked to see if ports 1&2 work yet.

- The Marvell drive controller that the rear eSATA and PATA ports are connected to is apparently at a different bus location than the Marvell controller on an actual P6X58D, meaning that disabling it in BIOS does nothing (it's always on).

- Like the PATA controller, the ASUS ExpressGate isn't attached where it is on a real P6X58D, meaning that ExpressGate doesn't work. However, the internal USB port it's connected to does work, and it defaults to the first removable boot device; you must switch/disable this device in order to boot.
On the plus side, the ExpressGate SSD is no longer hidden from the system (shows up as a USB flash drive), so you can wipe it and put whatever you want on it.

http://www.overclock.net/gallery/dat...xpressGate.png