Weird results on 3dMark test

Dec 3, 2017
22
0
510
Hi.
This is my config:

i5-8600k
MSI z370 tomahawk
Gigabyte gtx 1070 g1 gaming 8G
Windows 10

The problem is: I run 3dMark free test and had a result of about 6500 points.
Then I overclocked my GPU with AORUS graphic engine and reloaded 3dMark Test. I expeced higher number but I had almost the same...

Any explaination?

Many thanks