Rx5882048 core frequency is more or less normal.
Rx5882048 core frequency 1257 to 1340MHz is normal. This is the new RX580 graphics card that AMD and its partners quietly launched a few days ago. In essence, RX570 is renamed after a slight change. The core remains unchanged, 2048 stream processors, called RX5802048SP, are called RX588 to show the difference and simplification, and the memory is still 256-bit 4/8 gbddr 5.