I know we've already covered these boards... But: http://www.asrock.com/mb/Intel/X99%20WS/
I think it would be a breach of trade description if this board doesn't support ECC as it clearly states at the top "Server grade X99 for making the most out of DDR4 ECC and RDIMMs"
'Making the most' would surely mean using the ECC ability.
The description also states:
Microsoft® Windows® Server 2012 R2 64-bit / Server 2012 64-bit / Server 2008 R2 64-bit support
Xeon® E5-1600/2600 v3 Processor Family for the LGA 2011-3 Socket, up to 18 Cores and 160W
Supports Quad Channel DDR4 3200+(OC) memory with max. capacity up to 128GB
Supports ECC*, RDIMM Memory (*ECC is supported with Intel® Xeon® processors)
Intel® Dual Gigabit LAN with Teaming Function (I217LM + I210AT)
10 SATA3, 1 eSATA, 1 Ultra M.2 (PCIe Gen3 x4 & SATA3)
These are all indicating that it is designed to be used a server board or at the very least, a workstation, which I guess is indicated in the model name.
I have sent ASRock a message to ask them to confirm if this board simply takes and will boot with ECC memory or if the feature is actually enabled. They're pretty fast at replying so I should have an answer soon.
Funnily enough, if I didn't hate Asus, they actually do an X99 board with IPMI: https://www.asus.com/Commercia…s_Workstations/X99WSIPMI/
Which is listed under servers and workstations. So I'm hoping that the X99 architecture can support ECC.