Mining Pools change their code too.. Most mining pool code was made for bitcoin based blockchains and cpu mining. A cpu has 1-16 cores, and a search can be aborted quickly.

The rtx 3090 has 10496 cuda cores. This meens 10500 processors. When a pool ask the miner to do a seach, all the 10500 cores are used. TBMiner is letting the 10500 cores complete their task before starting on a new job. Some pools send out a job, and then another job just a few ms after. and then declining the work of the first job. This pool fuck is forcing the modern gpu to run at "cpu style" speeds. loosing 10-20%