Anonymous sources told DigiTimes that AMD's upcoming Radeon R9 390X will be much shorter than the Radeon R9 290X, which has a length of about 280mm to 300mm.
The Fiji XT cards will reportedly be only as big as an average mainstream graphics card and the reason for this is the new High Bandwidth Memory (HBM). A card like the Radeon R9 290X has eight to sixteen GDDR5 memory chips on the front and back of the card, whereas the Fiji XT sits on an interposer and is surround by just four HBM memory chips.
FUD Zilla also claims that while AMD is planning to launch Fiji XT in June, the launch event will not be at Computex but likely at the E3 show in LA:
Currently, AMD's plan is to launch the card in June, but not at Computex. There is a gaming event just days after called E3 in Los Angeles, and we would not be surprised to see AMD making the big announcement there. Maybe they will even show a Fiji VR at the show, as we know that both HTC Re Vive and Oculus have been testing Fiji VR with their glasses.