Hello miners and Happy New Year !

I decided to start a topic as I couldn't even imagine the keywords for such issue. Very very weird

I've got a brand new RX VEGA 64 - SAPPHIRE ED. And it simply refuse to mine "calculate" monero shares. I've tried XMRCAST, Claymore AMD GPU miner. It just refuses.

http://imgshare.free.fr/uploads/ab177341a0.png

But no issues with ETH on Claymore Dual v10. Not a single one !

I have 16 of them and only one single card does it.

What was tried :

-with or without risers
-different risers, mobo brands
-stockclock / overclock-undervolting
-tried to flash uefi but it sais to be same

If you 've got any idea it is totaly wellcome.

One small tiny stuff though : it was sold as a brand new buy a huge online french reseller but when i powered it the LEDs were switched to blue while by default its red. A bricked gpu by a "former user" ?

Thank you a lot for your attention

Very best wishes for the next year

and Great Mining