Tensorflow 1.8.0 wheel built for Python 2.7 without GPU on a Ubuntu 16.04 VM running on a Xeon X5650 CPU that does not support AVX instructions (it's older than Sandy Bridge).
Usage:
pip install tensorflow-1.8.0-cp27-cp27mu-linux_x86_64.whl
This could be useful if your CPU is too old for the official Tensorflow package on PyPI.