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Problems upgrading ATI X1900 Graphics Card to a GeForce 8800GT

1740 Views 3 Replies Latest reply: Aug 16, 2009 4:44 AM by Wingrove RSS
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Aug 14, 2009 12:11 PM
I have a 1st gen Mac Pro (2x2.66 - purchased Jan 07) with an ATI X1900 graphics card running OSX 10.5.8.

Have recently purchased a Nvidia GeForce 8800GT graphics card from a dealer on Ebay to replace the ATI X1900. Upon installation the Mac Pro refuses to Boot with five chimes being heard followed by a short silence and then a further five chimes. This continues in a loop. When switching back to the ATI X1900 card the Mac Pro works perfectly.

The GeForce 8800GT is Apple Part No MB560Z/A and the card itself has the number 630-9492 both of which lead me to believe that the card should work with my Mac Pro. Any ideas what could be wrong?
Mac Pro 2.66GHz 5GB RAM ATI X1900, Mac OS X (10.5.8)


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