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Got this error on one Sapphire RX 480 Nitro+ 4GB

GPU #1 got incorrect share. If you see this warning often, make sure you did not overclock it too much!

Tried down-clock and stock settings on three different bios-es, tried single and dual mining. Every single ETH share is incorrect. On dual mining all ETH shares are incorrect and the other coin shares are submitted without any problem.

Someone else got this or solved it? Any input is appreciated, thanks.

what is your setting in claymore (cmdline would be helpful) it may be related to a wrong configuration.

Just the pool and the wallet address in the command line, no settings at all. Changing AMD drivers now with no success so far. (Win10 64bit)

yes but i wanted to see your config, to see your pool, port, and so on. you replace your wallet adress with anything, just to see the structure & pools

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -epool eu2.ethermine.org:4444 -ewal wallet -epsw x -allpools 1

here.

edit: I have now tried 16.9.2 16.11.2 16.11.3 16.11.5 and nothing helps. This is getting so annoying. Someone to help?

Open GPU-Z and see what gpu and RAM speeds it shows for default and current. It may be still keeping higher setting that causes your card to misbehave.

Thanks for the input, checked and shows correct values, still it does not accept a single ETH (nor ZEC for that matter) share. Frustrating.

Can you try the card in a different rig ?

That will be done tomorrow, only that and fresh windows install are the things that are not tried.