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Radeon HD 6450 gives me black screen and reboot, cant see installation screen

Joined
May 29, 2014
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Classic Mac
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I used UniBeast to make a Sierra Stick. But everytime the apple logo shows up, my screen flickers after the loading bar is halfway through and reboots. My radeon hd 6450 should work oob so I dont know whats the issue here. I‘ve tried everything. Lilu and whatevergreen doesnt do anything.

My pc is a hp compaq 8200 elite with an i7 2600 and 8gb of ram.

Please help.
 
Joined
May 29, 2014
Messages
8
Mac
Classic Mac
Mobile Phone
It seems theres no kernel panic.

I checked those boxes you said but it restarts. The last line I could read is the same last line I can read with my other GT710. But the GT shows the login screen, the 6450 restarts.

My clover graphics menu looks like this, theres always bulrush automatic. Normal? I leaved it blank but same result:
 

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Joined
Aug 2, 2013
Messages
82
Motherboard
Gigabyte Z97X-UD5H-BK
CPU
i7-4790K
Graphics
Nvidia Geforce GTX 980 TI 6GB
Mac
iMac, MacBook Air, Mac Pro
Mobile Phone
iOS
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