Hey!
my system: 5700 XT, 3x6700 XT, 6900 XT, + 6600 XT.
Before installing 6600 XT, the system worked stably on a 5.7c miner with drivers 21.3.1. -CLКernel 1. Good stable hashrate, 0 stale and invalid shares.
After adding the 6600 XT to the system, I had to install the latest drivers. With them 5.7 and 5.8b, the miner does not work in -CLKernel 1.
2 out of 6 video cards issue
Failed to compile program: clBuildProgram (-11)
Unable to prepare kernels: clCreateKernel (-46).
If I write -CLКernel 0, then all cards work, but the hashrate is slightly lower and 0-4% stale shares appear.