Hey Todxx
I quickly installed 18.40 driver and now it seems to work. All 12 GPUs initialized & started mining.
The bad news: the hashrate is lower than on xmr-stak with 16.60 driver. For RX 550 the best driver is by far the 16.60 drivers.
Could you maybe look into this, to make it work with 16.60 driver?
On the other hand: with the 18.40 driver xmr-stak instantly crashes the driver upon starting.
Also tested with 17.40 drivers which is reasonably comparable with 16.60 drivers.
xmr-stak: ~5100 H/s for 12 RX 550 Sapphire Lexa
teamredminer: ~5000 H/s for 12 RX 550 Sapphire Lexa
Same settings.
Not running this at max settings, if I really push it I can reach 480-500 H/s but the bad silicon ones (1-2 in each rig will crash).
Could you guys finetune RX 550/560 a little more? I could also provide some RX 550/560 + SSH connection if you need to test. I got various models.
I'm afraid you hit a bit of a short coming of our tuning with the RX 550s/560s

. We only got a couple 550s and 560s to test with about a week ago, and we haven't been able to do much tuning for them yet.
Thank you for the kind offer of ssh access, we might just take you up on it

I'll sync up with kerney tomorrow and we'll make a game plan for addressing the RX 550/560 tuning.
Btw, which cn_config setting did you use for the 550s?