I had already seen the intel-ready-mode-technology-brief and noted this sentence
"Intel® Ready Mode Technology-equipped PCs utilize 4th generation Intel® Core™ processor-based advanced power management
and advances in motherboard and peripheral idle power consumption".
but didn't interpret it to mean that all 4th gen CPUs supported Ready Mode Technology. If that's true and applies to 5th gen CPUs too then that's half my battle.
I had hoped just to find a CPU & motherboard which both said "Supports Intel Ready Mode Technology" but it's not that easy.
The otherwise excellent Intel CPU selector doesn't mention it. I thought that finding which CPUs support the S0ix power states might help but that's not listed either: the closest I can find on this spec page is "Idle states: Yes"
Looking at Intel's March 14 announcement (p15), it's clearly aimed at OEMs (like Microsoft's similar Connected Standby/InstantGo):
"Intel® Ready Mode Technology is a capability that takes advantage of new power-saving states in
Intel’s 4th gen Core desktop processor combined with software and board level optimizations which
enable OEM desktop computers that are instantly ready and always connected while sipping power1
OEM systems available today with more on their way
1 Requires the purchase of Intel® Ready Mode Technology-enabled desktop PC or motherboard, a genuine Intel® processor, internet connection, Windows* 7 or Windows* 8 OS, and 3rd party software. Results dependent upon hardware, applications installed, internet connectivity, setup and configuration. Performance may vary based upon hardware, applications installed, internet connectivity, setup and configuration. Enables an OEM to meet energy regulations per published testing guidelines from global energy regulatory bodies."
Note the "desktop PC or motherboard"; that's encouraging, but what about the "3rd party software"?
Are OEM's using their own brand names for Ready Mode Technology (Gigabyte Power Miser or whatever)?
tl;dr Which socket 2011-v3 motherboards support Intel Ready Mode Technology? Wrong forum, I know.