Possible in principle to upgrade from single to dual quad core Mac Pro?

[macbook123]

I was thinking of buying a quad core now, and possibly upgrading at some later time (when the faster quad cores become cheaper). Is it possible?

 

[Cindori]

No, the single only has 1 cpu slot on the board.

 

[Umbongo]

https://forums.macrumors.com/threads/731080/

See my post at the bottom of that thread.

 

[VirtualRain]

Mac Pro's hold their value well... just resell it down the road on Craigslist or eBay and buy a refurbished octo core when you are ready.