Originally Posted by Aquinus
Depends on what you consider overkill. More VRM phases means each VRM is doing less work so less heat is being generated per VRM. Also when Cadaveca reviewed the board he found that the Deluxe had measured only 1-watt usage on the VRMs when the machine was idle. So it's not just about overclocking. It's about stability, power loss, and efficiency along with how much power it can supply along with the quality of that power. I've seen my 3820 eat 250-watts of power and every time I overclock it that much I'm glad I have 20 phases of CPU VRM goodness to ensure the quality of that power being delivered. I have had no vdroop issues with this board at all and LLC had been extremely flexible.
I run a 3930K 24/7 @ 4,8 GHz 1.36v and I can easily increase the overclock to 5,2-5,3 GHz with 1.55v without any kind of voltage fluctuation.
This all on a Rampage IV Extreme, I think it has even less than 20 phases, what matters is the quality of the phases IMHO.
I've seen upwards of 400W on this chip with 1.55v+ btw