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05-28-2010, 07:23 PM
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Join Date: Jul 2009
Location: Germany
Posts: 779
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No problem if your mainboard has a second PCIe16 lane. 
Also be sure to set the second card / the one for use with OS X, to be initial PEG in BIOS setup.
If your second card will be nvidia use EFI String for inject, if you're going to get an ATI 4XXX for second card, use GraphicsEnabler and edit ATIRadeonX2000.kext & the Controller kext corresponding to your card, to match your second card's Device ID only.
AMD Phenom II X4 955 - ASRock AM3A770DE - 8GB DDR3-1333 - Radeon HD 5570 1GB passiv - BCM4318 802.11b/g - Snow Leopard Retail
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AMD Phenom X3 8450 - ASRock AM2NF6G-VSTA (BIOS L2.39) - 4GB DDR2-800 - Radeon HD 4650 512MB - Snow Leopard Retail (retired) / OpenBSD
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