The latter error is not related to crash, the first is, either lower your memory clock or bump voltage.
Memory is running at stock clock. No OC only underclock,
I confirm second error is when gpu is recovering. After 40min running at 1373Mhz and 800mv, only 90Mh one the pool, miner report 142,87..
*** 0:41 *** 5/1 12:08 **************************************
Eth: Mining ETH on solo-eth.2miners.com:6060 for 0:41
Eth speed: 142.958 MH/s, shares: 15/0/0, time: 0:41
GPUs: 1: 71.495 MH/s (6) 2: 71.462 MH/s (9)
Eth: Accepted shares 15 (0 stales), rejected shares 0 (0 stales)
Eth: Incorrect shares 0 (0.00%), est. stales percentage 0.00%
Eth: Maximum difficulty of found share: 367.3 GH (!)
Eth: Average speed (5 min): 142.939 MH/s
Eth: Effective speed: 96.85 MH/s; at pool: 96.85 MH/s