Older mobo.
I have (1) 6800 GS w/256 ram, and someone is offering to give me two of their older vid cards, a 6800 w/256 ram, and a GeForce GTS 450.

If they are the same maker and general specs, I propose to run the two 6800GS/256MB video cards in dual-mode using the bus bar, that jumper link thingie, and see what happens.
Or if they are slightly dissimilar specs somehow, what will that do? or not do?

Or, should I just pop in the GeForce GTS 450?

Assuming the dual mode 6800 option works, which would be faster, that or the GTS 450?

Thank you very much.  :D

There's a 'dynamic' factor involved, in that improvements are not made to a given design until after X-number of people die from the negligently cheaper design first.
There've been any number of movie remarks addressing this, as in, "Why did/does someone have to die first, before they finally fix (that rotten design)?"
The expression is supposed to encapsulate this, and the closest I can come to recalling it is the one I suggested; necro-engineering.
But I'm not sure if that's it or not.