as long as the pinouts are the same, why not? its just a RCA type connector.
Some SPDIF brackets have a few R's and C's on them. A
typical scheme may be to drive a 3.3V signal from the sound
chip. The R's and C's attenuate and set the impedance to the
correct value for the coax (line matching). The reason
for the complicated 3.3V scheme, is you can connect an
optical module (as the 3.3V is a logic level signal), or you
can connect a coax (by attenuating the 3.3V signal to the
right level, and A.C. coupling it to the coax).
This one is for a Chaintech, and looks like the signal has
been pre-adjusted by the motherboard. By pre-adjusting, it is
mainly suited for coaxial use (not enough signal to drive
an optical module directly). That is why this adapter
is simpler in design, than one on an Asus board.
http://www.hothardware.com/reviews/images/7njs_k7ncr18d/ltekSPDIF.JPG
Knowing the motherboard model number, would make it easier
to search for a picture of the right adapter. There may even
be an illustration of the style of adapter, in the
motherboard user manual.
Paul