ASUS Maximus V Gene & Asus Radeon 7870 HDMI Problem

ivan_j4u

Honorable
Mar 13, 2013
4
0
10,510
Hi
Hoping for some help here please.. I have just built a new Gaming PC and I cant wait to get it all running.. although I am having a problem and think it is the graphics card.
System:

CPU: i5-3570K
RAM: 8GB Corsair
Mobo: Asus Maximus V Gene
VGA: Asus Radeon 7870 Direct CU II
PSU: SilverStone 600W
TV : Samsung LED 32"

Can someone explain to me,
when i plug the hdmi cable into the mobo, but the pictures come out vga intel detected is not asus radeon 7870. This may be due to the hdmi cable is plugged into the mobo, not hdmi asus radeon 7870.
but when i plug the hdmi cable into asus radeon 7870, picture did not appear. (because the source is not found by the tv hdmi)

why can happen like that?
What should I do?
please help ..

Thanks