TechPowerUp posted a review on the MSI GTX 1070 Gaming Z 8 GB
A quote from the article:
MSI's GTX 1070 Gaming Z is the bigger brother of the Gaming X, with higher GPU overclock and a memory OC, too. The backplate has also been pimped, featuring an RGB-illuminated MSI logo. Thermal performance is identical, which means the card is whisper-quiet and running low temperatures at the same time.MSI GTX 1070 Gaming Z 8 GB @ techPowerUp