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macrumors newbie
Original poster
Oct 28, 2009

I had an issue with my mac starting which I resolved by replacing the graphics card. The mac now starts without issue BUT!
In display preferences there is only one display resolution, no detect display button and if I try to calibrate the sliders have no effect

I have tried resetting PRAM and SMC with no effect and also tried a different monitor

Hardware Overview:

Model Name: Mac Pro
Model Identifier: MacPro3,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 3 GHz
Number Of Processors: 2
Total Number Of Cores: 8
L2 Cache (per processor): 12 MB
Memory: 8 GB
Bus Speed: 1.6 GHz
Boot ROM Version: MP31.006C.B05
SMC Version (system): 1.25f4
Serial Number (system): CK825060XYL
Hardware UUID: A29789E4-70BB-5D36-892E-DB48125FBB79

ATI Radeon HD 5770: (Previously ATI Radeon HD 2600 XT)

Chipset Model: ATI Radeon HD 5770
Type: Display
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 1024 MB
Vendor: ATI (0x1002)
Device ID: 0x68b8
Revision ID: 0x0000
ROM Revision: 113-C0160C-155
EFI Driver Version: 01.00.436
Resolution: 1920 x 1200
Depth: 32-Bit Color
Core Image: Software
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Not Supported
Display Connector:
Display Connector:

This is a brand new Graphics card (delivered today)
*NOTE* also tried DVI and VGA cable

Does it look like the new card has issues or perhaps a firmware issue?


macrumors 68020
Jun 22, 2010
It sounds like the driver isn't working properly (no Quartz Extreme). Make sure you're using the version of the 5770 designed for use with a Mac.


macrumors newbie
Original poster
Oct 28, 2009
Brand new card bought direct from Apple

thats what made me wonder about firmware
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