I want to power NUC8i7HVK with the normal ATX power supply. but there is only 12V. Can it be powered through the DC to DC converter 12V to 19V? If yes, then where i can find information about the connector? In the Standard NUC connector there 3 poles: one is for (+), second is for (-), and the third is what for? some kind of ID or something? will it work normally if the third pole will not wired or no?
no it is. because the connector 7.4mm x 5.0mm has 3 poles. 1)outside 2)inside 3) and the center pole. my question is what to do with the third wire? where connect it? if its some kind of ID like on DELL laptops, how to bypass it? and will the NUC work if i connect nothing to it?
Asked and answered, but I will be more explicit this time. You need +19V on the inner (2) and ground on the outer (1); the center wire (3) is ignored.
For more information, feel free to read this horridly long discussion that occurred when the HN/HV NUCs were first released: https://forums.intel.com/s/feed/0D50P0000490XIESA2.