Heaven Benchmark results slow on Win 10 Pro 16179 Preview

Just installed a new Asus GTX 1070 DUAL o8g graphics card on my desktop. Desktop has 3 separate SSD's (each with its own OS) and the results of the Heaven bench mark in the new preview build 16179 are disappointing compared to Win 7 HP 64 bit and Win 10 Pro (not preview). The latest Nivida drivers are updated as well as all Windows drivers and updates. Have Run SFC /Scannow on all 3 drives. See results below:

Win 10 Pro (Creators Update)
FPS: 161.1
Score: 4058
Quality: High
Res: 1920 X 1200

Win 10 Pro 16179 Preview
FPS: 59.2
Score: 1491
Quality: High
Res: 1920 X 1200

Win 7 HP 62 bit
FPS: 164.3
Score: 4139
Quality: High
Res: 1920 X 1200

The GTX 1070 is ONLY factory over clocked. These results are weird for the 16179 build.

Any thoughts ?

It may be the new Game mode features installed in the preview. Looking at the framerate, it appears something may be enabling vsync on the run

Is there a way to disable the Vsync?

Update: I did find where to disable Vsync, in the settings,when the program starts. I disabled Vsync and the program crashed and was unable to open it again to re ingage Vsync. Had to uninstall and reinstall to Get Heaven running again.

Still have program running slower than Win 10 pro and Win 7.