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R9 280X won't get to Bootloader. Stuck on Loading Operating System....

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Jun 12, 2011
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Motherboard
Mavericks
CPU
i7-2600k
Graphics
Radeon R9 280x
Mac
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Classic Mac
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Mobile Phone
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Hey guys,

I just got myself a new R9 280x (the Asus DCU2), upgraded from a Sapphire 6850.

After some research, I followed Tony's guide for moving Chimera to the EFI partition which seemed to work fine when I did it.

When I rebooted my computer, I was welcomed with a Loading Operating System ... that basically lasts forever, as if the system cannot find the boot loader.

I followed the instructions to the letter and did it many times in case I had made a mistake.
Card works beautifully with Windows 7 (which is on another SSD), problem is only with OS X. (Fresh install, 10.9)

Here are my specs:
Gigabyte Z68X-UD5-B3 (No integrated graphics)
ASUS Radeon R9 280X OC 1070MHZ 3GB
i7-2600k

What do you think?
Thanks guys!
 
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