100% incorrect shares

[MADM1k3]

I've recently encountered a very interesting problem. One of my cards (Asus RX470 Mining edition) started giving me 100% incorrect shares on ETH, while giving correct shares on any of dual-mining algos at the same time. I've flashed original bios, lowered clocks, but the situation remained the same. I tried moving it to another AMD farm, with different everything (new risers, mobo, psu, os, driver version) but it gives 100% incorrect ETH shares (even with no dual mining). I then tried moving it to nvidia farm, where it was the only amd card - and it worked! The card was now giving correct ETH shares. But as soon as i added secong RX 470 to that farm - the first one started giving incorrect shares again I've never encountered such a behaviour, any ideas would be greatly appreciated!

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[manji]

1. The original bios on your card or you download the same type bios from somewhere?.
2. Check Memory error using HWinfo.
3 . Check your PSU Power. After checking your PSU power and you feel enough, try to underclock from default bios stock setting. If still get an incorect share, it may Memory on your card has been broken.

[rysioslaw]

I had similar problem when I was different bios on one card. After changing BIOS everything worked good. Check do you have the same BIOS on all cards.

[MADM1k3]

1. The original bios on your card or you download the same type bios from somewhere?.
2. Check Memory error using HWinfo.
3 . Check your PSU Power. After checking your PSU power and you feel enough, try to underclock from default bios stock setting. If still get an incorect share, it may Memory on your card has been broken.

1. Tried 3 different bioses from internet + the original one.
2. No errors
3. As i said - i checked it on 3 different machines with 3 different PSUs. The card works fine when it's the only AMD card in the system - if i add another, it stops working properly.

[manji]

I have a different series in every my own rig, but I always put them like this, "red on red, green on green". So sorry I didn't have much experience to combine Red and Green. If "red on red, green on green" scheme didn't give you any problems, why not.

[Turkish88]

This problem can be in 2 reasons:
1st using not compatible with algo miner
2nd very high overclock
and of course corrupted hardware, but i am expect this

[MADM1k3]

Found the problem - the card gives 100% incorrect shares when i switch drivers to "Compute", if i use "Gaming" it works fine, but with lower hashrate. Anyone experienced this?

[baga105]

Install the blockchain drivers... from August

[MADM1k3]

Install the blockchain drivers... from August

That's exactly the problem - with blockchain drivers i get 100% incorrect shares. With normal drivers i get 30% reduction in hashrate, but all shares are valid.