Originally Posted by Takla
did you even read his post? he just said that the "Integrated Voltage Regulator" is on the CPU but the VRMs on the mainboard
What he said was the "The VRMs are NOT on the CPU, they are still on the motherboard, it is the Voltage Controller that is now on-die" which is not accurate. There are voltage regulation modules (VRMs) on the chip - that's what the iVR is, a voltage regulator. Hence the name.
Voltages are the other big change with Haswell. All Haswell SKUs will ship with an integrated voltage regulator. Instead of having multiple voltage rails driven by external voltage regulators enter the SoC, Haswell will accept two input voltages: Vccin for logic and Vddq for DRAM. Vccin should typically be somewhere in the 1.8V - 2.3V range, with a max of 3.04V. Vddq will depend on your DRAM type. The integrated voltage regulator will support all of the same adjustments than we're used to on current Ivy Bridge platforms