There's an (Nvidia Mellanox) "HPE Dreamfyre" switch on Ebay:
https://www.ebay.com.au/itm/134604252621
"Dreamfyre" sounds like some internal project name.
The photo's of the item show what looks like high bandwidth connections to a backplane, so maybe the Dreamfyre is a blade server chassis or HPE rack server or similar?
https://i.ebayimg.com/images/g/1wwAAOSwbPtkgbsb/s-l1600.jpg