cryptonight algorithm problem for sapphire graphics card

[canavarcafer]

i have three rig rx 570 and 580 and mining cryptonight algorithm. İ am taking 800-1000 for cards but sapphire 570 and 580 cards taking only 50-200. İ am using cast xmr miner. What is problem this algorithm with sapphire cards. İ cant solve this problem. Any idea can you give ?

[OgNasty]

i have three rig rx 570 and 580 and mining cryptonight algorithm. İ am taking 800-1000 for cards but sapphire 570 and 580 cards taking only 50-200. İ am using cast xmr miner. What is problem this algorithm with sapphire cards. İ cant solve this problem. Any idea can you give ?

Have you tried switching the problem GPUs to another rig to see if they have the same issue and if the working cards are able to perform full speed in the problem rig?  That's where I would start.  Once you've confirmed it's an issue with the GPUs, you should then monitor their temperatures to make sure it isn't a heat problem.  If they don't work properly in a confirmed working rig and the temps aren't the issue, you might be looking at a GPU BIOS flash or an RMA.

[Geraldo]

Seems like this issue isn't related to the brand.
So you have three rigs, may you can tell us how much Sapphire on those three rigs that were troubled? All of Sapphire?

The best way to check it may as OgNasty said, switch it. Fine cards to the troubled rig and Troubled card to the fine rig.

Sometimes AMD's cards need to read output, may you can plug dummy output to the troubled cards.

[RIGED]

we are using all variations of the Vega 64-56 including Saphire and never had Saphire specific problems

https://vegatoken.org/

[marcrblevins]

Monero did a hardfork on April 6th

https://monero.org/forks/

A lot of miner software updated for CryptoNight v7 protocol.