Quote from: miningchamp93 on July 30, 2018, 02:08:14 PM

Hashrate 1 MHash/s
Algorithm CryptoNote
Manufacturer MSI
Power Consumption
Core Clock 1257 MHz
Memory Clock 2000 MHz

The MSI Radeon RX 580 provides hashrate of 1 MHash/s for CryptoNote at Coreclock 1257 MHz and Memoryclock 2000 MHz.

Gpu Specs

The AMD Radeon RX 580 is a graphics card by AMD. It comes with GDDR5 memory and has 256 bit memory interface or bus width.

Inside Radeon RX 580 there is an Polaris 20 graphics processor chip which has 2304 shaders. The base operating core clock speed of Radeon RX 580 is 1257 MHz and memory clock speed is 2000 MHz.

https://miningchamp.com/gpus/266/Sapphire-Radeon-RX-580-hashrate

A RX580 can mine cryptonight at 800H/s ~ 1050H/s (so, at 1,05KH/s). The hashrate varies depending:
1- The memory manufacter (Elpida, Samsung, Hynix, Micron)
2- The strap/OC
3- Driver (eg. Compute Mode disabled, old driver)
4- Miner/configuration

Any 580 can reach 900H/s+ with proper biosmod. But I really don't know what miner Nicehash is using to Cryptonight mining.