My new graphics card would not work, my old one does!

[ZaYoOoD]

Hello,
this is my first time trying the hackintosh method, i'm using the iBoot and multibeast.
So here is what i did,
first i installed snow leopard through iBoot,
reboot,
did the configuration of Apple,
updated to 10.6.6,
installed "EasyBeast & System Stilities" from MultiBeast,
reboot..

"i did the previous 3 times, for the following reason"
now when i boot "from either iBoot or HDD" it gives me a blank screen and my moniter goes stand by..
so i figured my "New" graphics card may not be supported,
The Graphic Card is Sapphire Radeon HD 5670..
I switched to my old graphics card "GeForce Nvidia GT 6400"
and it worked, Snow Leopard showed up,

then i did the kexts and post installation files..
reboot..

The question is:
Is it possible to -by any way- to make my New Graphics Card 'Sapphire Radeon HD 5670' working with the system?
using any kext or whatever?

 

[sfrv]

I have this one SAPPHIRE 100287VGAL Radeon HD 5670 (Redwood) 512 MB ddr5.

Worked OOB with GraphicsEnabler=No to boot after install, and was recognized and full res after 10.6.8 update but still no hdmi audio, and only video thru DVI I can connect a second monitor with the hdmi but only mirror, have not tried vga.

ATI Radeon HD 5600 Series:

Chipset Model: ATI Radeon HD 5600 Series
Type: GPU
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 512 MB
Vendor: ATI (0x1002)
Device ID: 0x68d8
Revision ID: 0x0000
Displays:
SyncMaster:
Resolution: 1920 x 1080 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: HVLQA00320
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Display Connector:
Status: No Display Connected
Display Connector:
Status: No Display Connected