I have a rig with 5 7970.
It works well in the last few months with various version of Claymore miners.
At present, after the miner is started and run for some time it shows
"Cannot get Overdrive capabilities for adapter 0 " and then stopped automatically.
How to solve this problem.
0:33:07:438 ed8 ZEC: Stratum - connecting to 'cn1-zcash.flypool.org' <120.55.168.103> port 3443 (SSL/TLS)
00:33:07:488 ed8 cert subject: /OU=Domain Control Validated/OU=PositiveSSL Wildcard/CN=*.flypool.org
00:33:07:498 ed8 cert issuer: /C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO RSA Domain Validation Secure Server CA
00:33:07:498 ed8 SSL/TLS encryption is enabled
00:33:07:498 ed8 send: {"id": 1, "method": "mining.subscribe", "params": ["equihashminer", null, "cn1-zcash.flypool.org", "3443"]}
00:33:07:508 ed8 send: {"id": 2, "method": "mining.authorize", "params": ["Zaddress.rig2","x"]}
00:33:07:508 ed8 send: {"id": 5, "method": "mining.extranonce.subscribe", "params": []}
00:33:07:508 ed8 ZEC: Stratum - Connected (cn1-zcash.flypool.org:3443) (SSL/TLS)
00:33:07:548 ed8 got 62 bytes
00:33:07:548 ed8 buf: {"id":1,"result":["31b1b848e3", "31b1b848e3"], "error": null}
00:33:07:548 ed8 parse packet: 58
00:33:07:548 ed8 new buf size: 0
00:33:07:558 ed8 got 38 bytes
00:33:07:558 ed8 buf: {"id":2,"result":true, "error": null}
00:33:07:558 ed8 parse packet: 35
00:33:07:558 ed8 ZEC: Authorized
00:33:07:568 ed8 new buf size: 0
00:33:07:568 ed8 got 119 bytes
00:33:07:568 ed8 buf: {"id":null,"method":"mining.set_target","params":["00083126e978d4fdf3b645a1cac083126e978d4fdf3b645a1cac083126e978d4"]}
00:33:07:568 ed8 parse packet: 118
00:33:07:578 ed8 Pool sets new share target: 0x00083126 (diff: 8000H)
00:33:07:578 ed8 new buf size: 0
00:33:08:408 87c Cannot get Overdrive capabilities for adapter 0
00:33:08:558 ed8 got 61 bytes
00:33:08:558 ed8 buf: {"id":2,"result": null,"error": [20, "Work not yet ready!"]}
00:33:08:558 ed8 parse packet: 54
00:33:08:568 ed8 ZEC: Authorization failed
: {"id":2,"result":null,"error":[20,"Worknotyetready!"]}
00:33:08:568 ed8 buf was cleared
00:33:09:988 6b0 recv: 51
00:33:09:988 6b0 srv pck: 50
00:33:10:008 6b0 Cannot get Overdrive capabilities for adapter 0
00:33:10:038 6b0 srv bs: 0
00:33:10:038 6b0 sent: 182
00:33:11:458 87c Cannot get Overdrive capabilities for adapter 0
00:33:14:508 87c Cannot get Overdrive capabilities for adapter 0
00:33:15:008 69c recv: 51
00:33:15:008 69c srv pck: 50
00:33:15:028 69c Cannot get Overdrive capabilities for adapter 0
00:33:15:058 69c srv bs: 0
00:33:15:058 69c sent: 170
00:33:17:558 87c Cannot get Overdrive capabilities for adapter 0
00:33:20:038 bc0 recv: 51
00:33:20:038 bc0 srv pck: 50
00:33:20:048 bc0 Cannot get Overdrive capabilities for adapter 0
00:33:20:078 bc0 srv bs: 0
00:33:20:088 bc0 sent: 168
00:33:20:608 87c Cannot get Overdrive capabilities for adapter 0
00:33:23:658 87c Cannot get Overdrive capabilities for adapter 0
00:33:25:068 728 recv: 51
00:33:25:068 728 srv pck: 50
00:33:25:088 728 Cannot get Overdrive capabilities for adapter 0
00:33:25:118 728 srv bs: 0
00:33:25:118 728 sent: 168
00:33:26:708 87c Cannot get Overdrive capabilities for adapter 0