Are you using the recommended driver (18.1.1) with CrossFire off?
The log file is in %AppData%.
18.1.1 freshly installed (had 17.12.2 but removed with DDU)
I don't even have the CrossFire option in Global Gaming
I don't see anything in the log that's tellling. This is the last few entries before the last blue screen....there is nothing. Anyway to increase the logging?
2018-01-23 18:52:48.6626 [13] Received new job: 6d8f
2018-01-23 18:52:49.0245 [14] Device #1: 591.57 Kh/s (NeoScrypt)
2018-01-23 18:52:52.6321 [7] Device #0: 562.71 Kh/s (NeoScrypt)
2018-01-23 18:52:53.6751 [13] Received new job: 6d94
2018-01-23 18:52:58.6864 [13] Received new job: 6d9a
2018-01-23 18:52:59.0392 [14] Device #1: 607.39 Kh/s (NeoScrypt)
2018-01-23 18:53:02.6478 [7] Device #0: 590.15 Kh/s (NeoScrypt)
2018-01-23 18:53:03.6985 [13] Received new job: 6d9f