If you really feel up to a Dell MB swap TP412 from the T3400 workstaion should "fit". But any mismatch at the rear I/O will require metal work, and the fornt I/O cable will have a different pinout and an added heat sensor in the front circuit board so you'll need those 2 peices also. Whether the buttton, and light will line up I don't know. They're at 2 ends of the age spectrum for BTX systems. The TP412 is an X38 MB that supports QX9650 and can run 4.15GHz with Throttlestop software overclock. It supports dual GPUs but only older HD cards. All Dell BTXs have trouble with Radeon r9-3xx (285) and up GPUs.