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4gb card stopped working today, fix?

Try to restart miner, it should work fine.

And check the GitHub, there is new version Team Red Miner v0.7.12

nothing, all my 4gb rig stopped working with eth

Maybe some extra info would help, driver version? windows performance settings (visual effects and virtual memory)? system env settings added?

using the blockchain driver 22.19.656.0, windows 10 with visual effect off, virtual memory 50gb, all the env thats come in the start eth

the miner start all good but only 1 gpu 8gb are hashing good, the 4gb are hashing at 1mh

Have you tried driver 19.4.3? claymore did most of the testing with that. How much you got system ram? sometimes it helps to have more than 4gb.

And this might help

Code:

Changes in v0.7.10

Release notes:

Ethash 4GB rigs, especially on win, should use --eth_alloc_epoch=N with N being the max epoch that the gpus can allocate. This will avoid DAG reallocation issues.

Same problem here.
Just install v0.7.13, followed instructions, but no result. Hashrate is still 7 Mh/s on the whole 6 GPU rig Huh

Last thing i can do to help is ask you to read the ETHASH_4GB_HOWTO.txt from that teamredminer-v0.7.13-win.zip ,

Code:

- This guide and testing applies to gpus _without_ monitor(s)
connected. At this point, there simply isn't enough vram on the gpu
to both store the DAG and drive graphics.

but i think you have to have one card with over 4gb ram or use igpu...