"First of One" wrote in message
...
Good point. A few minutes on Google and it looks like no manufacturer has
deviated from the reference design by putting a VIVO chip on the PCB. Oh
well.

I just upgraded to an eVGA GTX 260 SSC 896Mb unit and it won't do it either.
None of the GTX 280's I looked at when upgrading did. I think it's largely
an add-on card or dongle thing now.