AMD hasn't revealed the launch date of its next-gen video card yet but if new information leaked by BenchLife is correct, AMD is planning to launch the Radeon R9 300 series rebrands on June 18th with the Fiji XT (R9 390X) following on June 24th.
We can't verify the accuracy of this rumor but this would mean the new AMD cards are arriving a couple of weeks later than previously expected. Most people anticipated AMD would launch the cards around Computex (June 2-6) or E3 (June 16-18).
Its worth noting that this is the approximate time frame of E3 (18th June) for the Radeon R9 300 series while as the Fiji XT GPU will apparently be getting a launch date all of its own – 24th June 2015. The same source also mentions that the GPUs might make an appearance during Computex but will not hit the shelves till the 18th. The first iteration of AMD’s Next Gen launch is the Radeon R7 360, Radeon R7 370 and the Radeon R9 380 series – which are all basically rebrands.