rx 460 ugly color and resolution issue

I just bought a Gigabyte Radeon™ RX460 WINDFORCE OC 2G. I decided to reinstall my OS (Windows 10 64bit), everything looks ok before I install the RX460 drivers here (same problem happen when i use the drivers on Gigabyte link).

 

Im using:
AMD A8 7600

Gigabyte F2A68HM-S1

HyperX 8GB DDR3 1866

Thermaltake TT-450NL2NK

 

Ive been using that unit(without videocard) for months using vga to vga on my HDTV. Now that I use rx460 using HDMI to HDMI on the same tv, im having some problems after I install the drivers

 

Problems:

1: Ugly color

2: Resolution become larger

 

Color became unpleasant, you will know that somethings not right.

My tv has 1080p resolution but after I install the drivers, the 1080p become larger than my tv.

 

Sorry for my bad English.