Yes, currently, this feature is only available on a few of the X58 motherboards. This is available as a voltage measure point next to the memory on the edge of the motherboard.
Currently, only these models have the voltage measure point:
EVGA X58 Classified
141-BL-E759
141-BL-E760
141-BL-E761
170-BL-E762
Example from the EVGA X58 CLASSIFIED (141-BL-E759)
