The RX 580 2048SP was rumored a while back and we talked about how it had similar specs when compared to the RX 570. Here we have the official benchmarks of the Sapphire RX 580 2048SP and ...

(Sapphire Nitro+ RX 580 Boost speed 1380MHz, memory 8000MHz) 2,304 Unified Shaders Memory 8GB GDDR5 Memory Speed 2,100MHz, Effective 8,400MHz Memory Interface 256-bit Reference Memory Bandwidth ...