two rigs stopped working today, sapphire nitro+ 8gb

GPU2: Free VRAM: 7.950 GB; used: 0.050 GB
GPU2: Disabling DAG pre-allocation (not enough VRAM)
GPU2: Allocating DAG for epoch #379 (3.96) GB
GPU2: Allocating buffers failed with: clCreateBuffer (-61).

win7 64bit, blockchain beta drivers
restored original bios, installed 20.4.2., same thing
let us know if you manage to fix it, thanks