Hi,

I just made a new rig using RX580 Gigabyte gaming.

I flashed my cards with a custom BIOS and was achieving 820 H/S with only 1 card on the mainboard.

Now that I put all the 6 cards on the mainboard (H81 PRO BTC 2) each card achieve 725 H/S and I can't get higher hashrate.

Do you have any idea why ?

Thank you for your help on this one.

Christophe