bought a 30" mac hd display for my 1.8 dual core g5 power mac running osx 10.4.11. The card in my computer only allowed me to get 1280x800 resolution. I upgraded to the ATI Radeon 9800 xt mac to power the display to get the optimal resolution of 2560x1600. I bought the following on ebay: http://cgi.ebay.com/ws/eBayISAPI.dll...MEWN:IT&ih=017 Product description is: Mac ATI Radeon 9800 XT 256MB Video Card G4/G5 Edition I put the card into my computer and still only got 1280x800. So I installed the following software updates: ati-mac-rom-update-aug-2005.dmg ati-radeon-10-3-6-jan2005.dmg macosx-ati-displays-4-5-7.dmg I am still only getting 1280x800. Furthermore both my system profiler and Ati control panel info profile seem to think the 9800 Pro with 128 ram is installed -- rather than the 9800 XT with 256 ram. System profiler says: ATI Radeon 9800 Pro: Chipset Model: ATY,R350 Type: Display Bus: AGP Slot: SLOT-1 VRAM (Total): 128 MB Vendor: ATI (0x1002) Device ID: 0x4e48 Revision ID: 0x0000 ROM Revision: 113-A07525-130 Displays: Cinema HD: Display Type: LCD Resolution: 1280 x 800 Depth: 32-bit Color Core Image: Supported Main Display: Yes Mirror: Off Online: Yes Quartz Extreme: Supported Display: Status: No display connected Did I install the wrong ROM update? So now the computer thinks its a different card? How do I reverse that? The card looks like the XT not the PRO -- when I compared it to pictures on the web. It looks like this: http://www.technewsworld.com/images/...ti9800xt_1.jpg QUESTIONS: Is the 9800xt the same as the x800xt? Why does my machine say I have the PRO installed? Is there newer software that I need? How can I get the 2560x1600 resolution? Help please.