You know pretty much that I am still agressively pursuing a BIOS for my M4A785TD-V EVO that allows me a broader range of undervolt, so I can boot at very low Voltages that would allow me to safely attempt to run my machine with passive cooling. My AIIX4 620 Deneb RB-C2 is fully stable with CPU 1 GHz @ 0.8V and IMC 1.2 GHz @ 0.9V during extremely long both Load and Idle periods.
I'm using the BIOS 2002 (There was a BIOS 2005 available quite a bit back but the changelog isn't compelling, seems to be released for PIIX6 support) that just allows me to undervolt for a maximum of 0.3V the nominal Voltage of the CPU and IMC, but I need more than that. This would allow me to not need to use k10stat for undervolting under Windows and just boot at the settings that I want to.
I also noticed that while the current BIOS possible undervolt works properly from the supplied Voltage perspective (Motherboard VRM I suppose), it doesn't update the VID value of the Processor, meaning that if I use CoreTemp or k10stat that reads it, they think that it is running at nominal Voltage when it is really running with a -0.3V offset. CPU-Z does recognize supplied voltage quite accurately (Though slighty lower than choosen Voltage or VID, even on nominal conditions). I don't know if other Motherboards BIOSes makes the Processor aware of VID value for properly reading by CoreTemp, but most importantly k10stat.
Anyways, you know that I am looking for news on this. This is my fourth ASUS Motherboard (I only builded one computer for my cousin that didn't had an ASUS), so as a customer I DEMAND SATISFACTION!1!1!1

Thank you.