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<blockquote data-quote="SimonPB" data-source="post: 1025953" data-attributes="member: 149106">Hi AllI have a MacPro 2x2.66 Ghz Dual Core Intel Zeon with 4Gb 667 Mhz DDR2 FB-DIMM running 10.5.6I have a 20&quot; ACD and a HP L1702 screen attached being driven by a NVIDIA GeForce 7300 GT.Occasionally the HP screen flickers with a purple colour cast, it seems to happen more when viewing java intensive web sites or if I am editing in Photoshop CS3, although it does happen on other occasions, just I have never related it to other apps. I have not noticed any issues with the 20&quot;ACD which is regularly colour balanced.When Snow Leopard was released, I upgraded my two MacBooks without issues, but on trying to upgrade the MacPro all went well until the final reboot and the screen(s) just cycled through showing the working desktop, then dark blue, then black and back to the desktop for a few seconds. I went through all the possible update combinations including a clean install. The problem still persisted.In the end I decided to revert back - it was possibly linked to issues with the graphics card and resolution.I am now in the situation where I need to upgrade to Snow Leopard and the purple casting on the HP screen is getting worse.Are the two problems linked (ie. the colour casting &amp; SL upgrade issues)?What is the recommended replacement card and will this cure both issues?I have posted the relevent info below.Many thanks for all advice etc.SimonHardware Overview:Model Name:&nbsp; &nbsp; Mac ProModel Identifier:&nbsp; &nbsp; MacPro1,1Processor Name:&nbsp; &nbsp; Dual-Core Intel XeonProcessor Speed:&nbsp; &nbsp; 2.66 GHzNumber Of Processors:&nbsp; &nbsp; 2Total Number Of Cores:&nbsp; &nbsp; 4L2 Cache (per processor):&nbsp; &nbsp; 4 MBMemory:&nbsp; &nbsp; 4 GBBus Speed:&nbsp; &nbsp; 1.33 GHzBoot ROM Version:&nbsp; &nbsp; MP11.005C.B08SMC Version:&nbsp; &nbsp; 1.7f10Serial Number:&nbsp; &nbsp; CK71609ZUPZNVIDIA GeForce 7300 GT:Chipset Model:&nbsp; &nbsp; NVIDIA GeForce 7300 GTType:&nbsp; &nbsp; DisplayBus:&nbsp; &nbsp; PCIeSlot:&nbsp; &nbsp; Slot-1PCIe Lane Width:&nbsp; &nbsp; x16VRAM (Total):&nbsp; &nbsp; 256 MBVendor:&nbsp; &nbsp; NVIDIA (0x10de)Device ID:&nbsp; &nbsp; 0x0393Revision ID:&nbsp; &nbsp; 0x00a1ROM Revision:&nbsp; &nbsp; 3008Displays:Cinema:Resolution:&nbsp; &nbsp; 1680 x 1050Depth:&nbsp; &nbsp; 32-bit ColorCore Image:&nbsp; &nbsp; Hardware AcceleratedMain Display:&nbsp; &nbsp; YesMirror:&nbsp; &nbsp; OffOnline:&nbsp; &nbsp; YesQuartz Extreme:&nbsp; &nbsp; SupportedRotation:&nbsp; &nbsp; Supportedhp L1702:Resolution:&nbsp; &nbsp; 1280 x 1024 @ 75 HzDepth:&nbsp; &nbsp; 32-bit ColorCore Image:&nbsp; &nbsp; Hardware AcceleratedMirror:&nbsp; &nbsp; OffOnline:&nbsp; &nbsp; YesQuartz Extreme:&nbsp; &nbsp; SupportedRotation:&nbsp; &nbsp; Supported</blockquote>

[QUOTE="SimonPB, post: 1025953, member: 149106"] Hi All I have a MacPro 2x2.66 Ghz Dual Core Intel Zeon with 4Gb 667 Mhz DDR2 FB-DIMM running 10.5.6 I have a 20" ACD and a HP L1702 screen attached being driven by a NVIDIA GeForce 7300 GT. Occasionally the HP screen flickers with a purple colour cast, it seems to happen more when viewing java intensive web sites or if I am editing in Photoshop CS3, although it does happen on other occasions, just I have never related it to other apps. I have not noticed any issues with the 20"ACD which is regularly colour balanced. When Snow Leopard was released, I upgraded my two MacBooks without issues, but on trying to upgrade the MacPro all went well until the final reboot and the screen(s) just cycled through showing the working desktop, then dark blue, then black and back to the desktop for a few seconds. I went through all the possible update combinations including a clean install. The problem still persisted. In the end I decided to revert back - it was possibly linked to issues with the graphics card and resolution. I am now in the situation where I need to upgrade to Snow Leopard and the purple casting on the HP screen is getting worse. Are the two problems linked (ie. the colour casting & SL upgrade issues)? What is the recommended replacement card and will this cure both issues? I have posted the relevent info below. Many thanks for all advice etc. Simon Hardware Overview: Model Name: Mac Pro Model Identifier: MacPro1,1 Processor Name: Dual-Core Intel Xeon Processor Speed: 2.66 GHz Number Of Processors: 2 Total Number Of Cores: 4 L2 Cache (per processor): 4 MB Memory: 4 GB Bus Speed: 1.33 GHz Boot ROM Version: MP11.005C.B08 SMC Version: 1.7f10 Serial Number: CK71609ZUPZ NVIDIA GeForce 7300 GT: Chipset Model: NVIDIA GeForce 7300 GT Type: Display Bus: PCIe Slot: Slot-1 PCIe Lane Width: x16 VRAM (Total): 256 MB Vendor: NVIDIA (0x10de) Device ID: 0x0393 Revision ID: 0x00a1 ROM Revision: 3008 Displays: Cinema: Resolution: 1680 x 1050 Depth: 32-bit Color Core Image: Hardware Accelerated Main Display: Yes Mirror: Off Online: Yes Quartz Extreme: Supported Rotation: Supported hp L1702: Resolution: 1280 x 1024 @ 75 Hz Depth: 32-bit Color Core Image: Hardware Accelerated Mirror: Off Online: Yes Quartz Extreme: Supported Rotation: Supported [/QUOTE]

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