Sapphire, it seems, has taken an interesting approach towards its Radeon RX 480 Nitro graphics cards. It is well-known that the company will release two versions – with 4 GB and with 8 GB of GDDR5 memory but the size of the memory buffer will not be the only difference. Instead the two cards will function at different clock speeds as well.
You may have guessed it by now – the 4 GB version will definitely be slower than the 8 GB model. It will run at 1306 MHz for the GPU, while the memory will operate at 7000 MHz, while the 8 GB version will operate its GPU at 1342 MHz, while the memory will run at 8000 MHz. In both cases the cards will be cooled by two 95 mm cooling fans that will cover a heat sink with a total of four heat pipes. The fans are automatically turned off when the card is idle and thus save energy while reducing noise to zero.
There’s no information on the prices of the two cards or when they will appear.
Source: Sapphire