My video card is HIGHLY unstable. I can barely type this message. Lines are across my computer right now. FYi: I have owned this x1900 XT since March 07. Today while simply viewing a few 5 min HD videos in a row, + 30 minutes of Call of Duty 4 the screen became scrambled with Tiles of R G B. I know this error VERY WELL. This is my second ATi Card that has this problem and I do NOT want another one. When I owned a Sapphire Radeon 9700pro on my old PC only a year later it started to cough out on me. Turns out it over heated, yet I did not tamper its settings. My other friend is also getting Direct3D errors in the video card, x1600XT. I reinstalled the OS for him, updated the drivers and motherboards and windows update, but still games are causing problems. This brings me to my conversation with the Mac Genius today: Me: My x1900 xt video card is going out. I understand these type of failures, I've dealt with the same ones before. I'd like to get this video card repaired so I can make use of it by selling it and also would like to buy an 8800 GT in the meantime. Young Girl: I'm sorry we don't have any 8800 GT's in stock but let me go check with the Mac Techs. ...(pause) Yes the cards will not be available til after the new mac pro 2008's arrive, and thats some time after the Mac Pro 2008s have sold (Is it just me or does it sound like they just want us to buy a new machine, and leave our upgrade options dead?) Me: Thats too bad, can I go pick up or order the Cable Quadro fx part no. http://www.welovemacs.com/9227128.html Young girl: I'm sorry we don't have that, but let me check again: Tech intervenes: Sir, sorry i can guarantee you that we don't carry misc. cables for video cards here. Young Girl: Ok, you can bring your video card in since its still under warranty. Also the 8800 GTs will not work for 2007 or 2006 Mac Pros, as of RIGHT NOW . Its possible Apple may or may not fix this error. ME: When can i get it fixed? I can't go too many days without the computer here. Young Girl: You can bring it in next on Saturday afternoon to be looked at. Me: Grumbles to my self.. thats a 2 days from now to look at it and how long to fix it? Young girl: I have no idea. .... Crap. As you can see, I can barely use my computer. It won't be long til I have to shut the thing down because of video card errors. What do I do now? I'm ordering that cable and hope it arrives soon. I live in the same state as the place for ordering. i will try to buy an off shelf 8800 GT by Evga and try to to get it working in Windows. If Apple does not comply to fix the EFi Problem I'm unsure about sticking to Apple for my main machine. [ QUESTIONS: Will I be able to login to windows with my user name and password or will the screen not show? Is the cable I listed Above the RIGHT CABLE for 8800 GT PC to work in MAC ? As far as I know, scrambled images and lines, and tiling is all part of Graphics card sending itself to an early retirement. What are you thoughts on fixing this card on your own? Can I fix it myself? FYI, the fans work fine.