D54250WKYXH
19V - 3.42A
04/2014

https://downloadcenter.intel.com/product/76977/Intel-NUC-Kit-D54250WYK

bios

https://downloadcenter.intel.com/download/23607

current: WYLPT10H.86A.0021.2013.1017.1606
i5-4250U @ 1.30GHz

make sure that usb keychain you are using with F7 bios update option has GPT partition table on it!