GTX 1070ti No Display

Jan 20, 2019
2
0
10
Hello guys, i have a little problem with my GPU. It's an ASUS Strix gtx 1070ti, brand new.
My Computer:
X470 Aorus Ultra Gaming
Ryzen 5 2600x
16GB Corsair Vengeance DDR4 ( 8x2 )
Samsung 860 Evo Internal 1TB
PSU be quiet Straight Power 580W
GeForce GTX 1050ti.

When i try to switch to 1070ti, i get no Display from the card. i tried to uninstall the nvidia driver for 1050 and install the 1070 ones but no luck. the card it's connected to the 6+2 power cable from the PSU and the white led is showing. The computer works, but the monitor power led blinks for 20-30 seconds and the it stays open, but still no display.

PS: the box says it's a GTX 1070ti, but the small label on the card says it's GTX 1070. don't know if it's a typo or not.