Hashrate drops from 29+ to 18 on RX 57 MSI Armor OC 8 GB Samsung memory


My rx’s 570 hashrate drops from 29+ to about 18 MHz mining on claymore using 1750 strap bios mode. I am able to uise stock bios only. Claymore dual won’t start if I apply 1 click timing BIOS mode (1500 timing strap).
This happens only with this card. I use the same OC for other cards. Other cards are rx 570 MK2 8 GB with Micron memory.
Does anyone has working moded bios for this card?