what type of bootloader is this ....?

i had a new device htc desire 820G+ and when i rebooted the phone in boot loader mode the devices goes to black screen with fast boot written in it (as shown in the image),


earlier i used htc one x+ and the bootloader of that device is white screen with hboot info cid number and many more info , but in htc desire 820G+ it just booted in only black screen where fastboot is written at the end of it.

BLACK == htc desire 820G+

WHITE == htc one x+

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