I need some help, All of a sudden my 4 card (1070 + 3 x 1060) rig changed to a 3 card rig (1070 + 2 x 1060)

Strange thing is, lspci shows :

00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-V (rev 31)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1b81 (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
02:00.0 VGA compatible controller: NVIDIA Corporation Device 1b84 (rev a1)
02:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
03:00.0 VGA compatible controller: NVIDIA Corporation Device 1b84 (rev a1)
03:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
04:00.0 VGA compatible controller: NVIDIA Corporation Device 1b84 (rev a1)
04:00.1 Audio device: NVIDIA Corporation Device 10f0 (rev a1)
06:00.0 PCI bridge: ASMedia Technology Inc. Device 1187

but nvidia-smi shows :

Mon May 28 21:17:22 2018
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 384.59                 Driver Version: 384.59                    |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GTX 1070    On   | 00000000:01:00.0 Off |                  N/A |
|  0%   60C    P2   115W / 115W |    937MiB /  8112MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+
|   1  GeForce GTX 106...  On   | 00000000:02:00.0 Off |                  N/A |
| 25%   47C    P2    85W /  60W |    907MiB /  3013MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+
|   2  GeForce GTX 106...  On   | 00000000:03:00.0 Off |                  N/A |
| 27%   50C    P2    84W /  60W |    907MiB /  3013MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|    0      2757    C   /root/miner/dstm-v0.6.1/zm                     927MiB |
|    1      2757    C   /root/miner/dstm-v0.6.1/zm                     897MiB |
|    2      2757    C   /root/miner/dstm-v0.6.1/zm                     897MiB |
+-----------------------------------------------------------------------------+

any idea what this might be ?