It appears as if AMD’s upcoming Radeon RX 5600 XT will feature the exact same stream processor count as the $350 RX 5700. According to a leaked spec sheet of an ASRock RX 5600 XT Challenger D graphics card the RX 5600 XT will feature 2304 stream processors, which we then can assume the RX 5600 XT is based off the same 7nm “Navi 10” silicon as the RX 5700 series. The thing that sets the RX 5600 XT apart from the RX 5700 is of course lower clock speeds, but also the memory subsystem. The RX 5600 XT will have only 6GB of GDDR6 across a 192-bit memory interface. This memory will also be 12 Gbps, compared to the 14 Gbps that is on the RX 5700.
With these specifications the RX 5600 XT will have 288 GB/s memory bandwidth, which is the same as NVIDIA’s GeForce GTX 1660 Ti. Compared to the 8GB of 256-bit GDDR6 running at 14 Gbps that the RX 5700 has gives it a 448 GB/s of memory bandwidth. Looking at the clock speeds listed we can see that AMD has turned things down with a up to 1620 MHz boost, up to 1460 MHz gaming, and 1235 MHz base. Based on these specifications we can assume that the RX 5600 XT will outperform the GTX 1660 Ti and will come close to the RTX 2060.