Hi all

I’m new to mining and have setup a small rig with 2x msi rx570 gaming x 4gb running windows 10 and xmr-stak-amd to mine at pool.sumokoin.com:3333
The problem is that I’m only getting around 575h/s per gpu at the moment when mining calculators have my gpu at 700h/s (bottom of the page)
https://minethecoin.com/coin/sumokoin
Is this normal without doing any of the bios mods and timing tweaks that I’ve seen on other threads for mining monero or is the only way to get up to 700h/s to go down that route?
Any tips would be much appreciated.

Thanks!