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Graphic: display 4 mb only problem

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Hey folks,

So everything works fine except the sound and the graphics. for some reason it shows that im use only 4 mb display although my monitor is connected to the graphics card.


/ Hardware specs/


Motherboard: GiGABYTE H87-HD3

CPU: intel i5-4590 3.5ghz

Ram: 12gb

Audio:Realtek ALC892(according to the motherboard book)

WIFI: TP-LINK TL-WN881ND wifi adapter

Hard disk:samsung HD103SI SATA 1TB

Graphics: sapphire r9-280x vaporx 3gb gddr5

Misc: microsoft keyboard and mouse


/Software specs/


OS X: mavericks 10.9

install method: N iresh usb

boot loader:chimera

install method: legacy

DSDT: standard unmodified

SDST: i don't know

Boot Flags: CPIUserRoot=1 and 1080P

boot.plist: i don't know where to find it, where can I find it?

please help me

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