Does anyone know an AM3 based motherboard that supports registered DDR3?
None of the ones I've looked up based on 790/790FX/790GX chipsets support registered DDR3.

I was wondering about AM3 boards with 4 memory slots to build a rig with 16Gb of ram, but the 4gb ddr3 modules I found are all registered, and no AM3 board that I found supports registered ram. What's missing here?

The crucial website is the only place so far where I found the 4Gb ddr3 modules
http://www.crucial.com/store/listmod...~HS~/list.html