Rig on 24/7 all year round

[fabiosato]

I have my ethermine rigs on 24/7, non-stop, for a year now.
In the beginning, each RX570 made 21mh/s (factory settings), now each one is making 17mh/s.
Any suggestions of why is the mh/s lowering? Does that happen to you all?

[bubbagump]

You need to update drivers.  AMD fixed this last year.

[Turkish88]

Your GPUD tired and working slow, give him 1 hour rest ))
If serious, check temperatures, maybe heat sink must to change already.
Second reason capacytors may dry up

[ukjames007]

and what card memory size? bios changed? did windows update drivers and put you back to stock?

[bagata]

You are loosing money, change bios and update drivers to mining/blockchain drivers

[Eterbank]

load a new bios, there are threads about it here

[dagarair]

plus like above add the blockchain drivers

[juanichiloco]

Yes looks like you are using the old drivers and need to update to the new Blockchain drivers to fix the dag issue for Eth mining.

http://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-ReLive-Edition-Beta-for-Blockchain-Compute-Release-Notes.aspx

[fabiosato]

Thanks everyone