Mine RX 570/580 4GB rigs stop working this morning (cannot allocate big buffer for DAG).
Runing Claymore's Miner v12 on Windows 10 v1709
Driver Crimson ReLive Edition Beta for Blockchain 

Other mining software works fine for me.

I wanna to point out that the last message is not related to me.
Those are mutual relations between these two forum members who both purchased coupons from me.

Guys, i replied to your inquiry via email.
Will gladly use escrow if you cover the fee.

Hello folks i have over $63000 in bitmain coupons
I sell them from 1% to 33% of the value.

SOLD OUT

You can pay using BTC, BCH, ETH, LTC or PayPal.

Let me know any questions you might have - I'm here to help.
Leave comment below or send me PM.