Boot problem with my computer

[Rockside]

Hi here,

 

Firstly here is my configuration:
GA-Z77X-UD3H
I5-3570K
AMD Radeon 7870HD by ASUS
8GB DDR3


I come to you because I have problems with my installation.
In fact I prepared a USB key of Mac Os 10.8.4 with the application dignity purchased.


The installation went smoothly, although I can adjust the white screen problem on boot, Now my computer load to the desktop without using the standby mode.


I just can not boot if I leave my HD7870 connected, I get a black screen with a bunch bizare writing, without reaching the bootloader.
If I remove my HD7870 boot is perfectly fine with the HD4000 contained in my CPU.


I can start my machine if I boot with my usb key, and arrived in bootloader I select my hard drive and mac OS boot properly.


Thank you in advance for taking the time to consider my problem, I hope so get a solution.

 

Ps : This is the screen i got when i boot without my usb key :

[artur_pt]

hello

 

take a good read here

 

     AMD 7970 Working With Full QE !    

 

good hack

[redneck]

I had a simular problem 

I had to installed latest Chameleon bootloader on HD .

used champlist to modify the boot plist.

you need kext for HD7870

I never got my ATI1300 working.

[Rockside]

Good News the update of the boot loader works fine, but i have to do with chameleon wizard.

Thanks a lot you save me 200€ cause i was going to buy a new graphic card

my radeon appears as HD7XXX 2048Mo in the system information but at least i don't have the boot problem

 

Thanks you again i'm going to continue read the post you show me.