In few Japanese stores there is a new unannounced graphics card from AMD. The Radeon R7 250XE looks like a smaller 250X with lower clocks and seeks to attack the range of GT 730 / 740 from Nvidia.
The card is still based on 28 nm "Cape Verde" silicon, featuring 640 stream processors and 128-bit of bandwidth. The GPU frequency is 860 MHz while memory are set to 4.50 GHz. The price tag of this model is around 60-70 dollars.
Source:
Techpowerup