####Edit#####
I believe one of my power supplies was weak causing all my issues.
Seems to be running fine now I switched out the power supply.
Disregard following post ----˅˅˅˅
Hi Guys/Gals
Anyone else having major issues with the Antminer S9's.
Mine ran fine full speed (~11) for 3 days then I noticed on the 4th day I was getting a scoring rate of around 8TH/s (one time it was almost 6).
So I powered down the miner then it runs fine at 10.5 - 11.5 TH/s for about 20 hours then my hash rate drops to like 9 - 8.5 and stays there.
I was asked by support to change my difficulty to 14336 that helped a bit but still not getting consistent results.
I was using stratum.bitcoin.cz:3333 and then switched to us-east.stratum.bitcoin.cz:3333 and it seemed to get worse.
Anyone have any ideas or heard anything?