Yep definitely lower - I'm getting 3.95 sol using 64w with my 1060 in my deeplearning rig using the forums zec nvidia docker image on ubuntu
Temp: GPU0: 48C
GPU0: 253 Sol/s
Total speed: 253 Sol/s
+-----+-------------+--------------+
| GPU | Power usage | Efficiency |
+-----+-------------+--------------+
| 0 | 64W | 3.95 Sol/W |
+-----+-------------+--------------+
Temp: GPU0: 48C
GPU0: 253 Sol/s
Total speed: 253 Sol/s
+-----+-------------+--------------+
| GPU | Power usage | Efficiency |
+-----+-------------+--------------+
| 0 | 64W | 3.95 Sol/W |
+-----+-------------+--------------+