Adding a supplementary GPU
Dear friends,

We built a new RIG: Motherboard ASROCK H510 Pro BTC+, 3 GTX 1660 TI (Gigabyte), Power supply 850W (Gold)
Everything was fine, the worker mining perfectly on Ethereum, via Nanominer/Nanopool.

Today we decided to add a fourth GPU, absolutely the same than the previous ones (GTX 1660 TI).

THE ISSUE : impossible to make work the four GPUs together (indiferently and successively one of them no working, GPU-0, or GPU-1, or GPU-3 ) and not any mining work on, with this incomprehensible message: "CUDA call failed: all CUDA-capable devices are busy or unavailable".

Thanks for help if possible.

--
Mourad
(France)
