I get invalid solutions also on 280x and pool shows miner offline.
Hi there, may you share what driver you use? I will try to check why that one produces fault shares with the kernel

how to fix low difficulty share?
Single low diff shares can occur , but should be minority. If all are low diff shares some part of the miner does not work properly with your driver.
At all who have trouble with invalid shares:
Please share OS & Driver version. It seems my binary Kernels cause Problems on other then the blockchain drivers (whete they were compiled) By the way: did anyone test with Nvidia how close to ewbf we are?
Using windows 10 with 22.19.659.0 driver version. any suggestion which drivers i should use?