I tried many different values with the --4g-alloc-size but my 4GB gpus don't want to start mining

I have in my first slot an 8GB r9 390 and on the rest a fury 4gb and some r9 290 4gb. The fury for some reason starts mining in slow mode but the other r9 290's fail.
This is what I get when the miner starts:
GPU 2: insufficient memory for DAG epoch 382.
GPU 2: will be in Zombie mode with reduced hashrate.
GPU 3: insufficient memory for DAG epoch 382.
GPU 3: will be paused.
Start DAG gen on GPU 2 (slow mode)
GPU 1: insufficient memory for DAG epoch 382.
GPU 1: will be paused.
Which OS and which Driver version?. You can try --4g-alloc-size 4068 and steps of 2 until it doesn't work....