Leopard ATI Radeon X1900 XT Freezing Issue, fixed with 10.5.2?

Mac Pro (8-core) original 3.0Ghz 8 core. Purchased October 2007. Ran Tiger 10.4.10 from the box. updated to 10.4.11. ATI Firmware update was not required as it was pre-installed. Never had a crash. Installed Leopard 2 days after release. Installed 10.5.1 the day of release. No problems so far...
A week later watching the "Jelly" iTunes Visualizer, the Screen froze, but iTunes kept playing... The machine was reachable over SSH but very much useless as a reboot command hung. Hard reset, went about my business. A day later unit froze during iTunes Jelly Visualizer again. this time music also crashed. As I approached to reboot the unit noticed very loud video card fan noise. Extracted the burning hot card, later compress air removed some clogging dust bunnies. Reinstalled card and no more freezes for 2 weeks. Freezes again, this time watching youtube in Safari. Made sure data backup is up to date. Performed an Archive and Install of leopard, ran all updates to 10.5.1. This time Mac Pro was fine for a week .... *Freeze*.
Called apple care, after having to explain to a rep what itunes visualizer was, referred to iPod specialist, who transfered me to Mac Pro specialist, 1 hour later, thoroughly explain issues to rep, who after 45 minutes was convinced issue with HW and not SW . Apple sends Do It Yourself repair video card. I replaced it. 4 days later unit Froze again. This time watching movie on VLC...
A week later 10.5.2 was released, and shortly thereafter Leopard Graphics Update 1. So far **nervously knock on wood** no more freezes. I am hoping that whatever black magic was included in these recent updates fixes the Leopard crashes with ATI Radeon X1900 XT. Needless to say this is the last ATI Radeon I "buy".
I need to know and track other users findings issues and experience with Leopard and the ATI Radeon X1900 XT on a Mac Pro. Been reading about a lot of issues with Leopard and the ATI Radeon X1900 XT on the these boards. Google turns up info galore. ...
I am holding my breath

Spoke too soon. Today as I was leaving the house I set the Mac Pro to sleep. When I attempted to wake the machine upon return, display 1 became all garbled. Display 2 was still visible and the mouse moved, but I was not able to click any windows. I ssh'd in with my macbookpro and was able to do a "sudo reboot". In the process it got stuck and in a loop I received:
Feb 17 16:02:37 octagon kernel[0]: ** ASIC Hang Log End **
Feb 17 16:02:38 octagon kernel[0]: ATIRadeon::waitfor_rbspace: Overflowed block waiting for FIFO space. Have 0, need 5. RBBM_STATUS 0x9001c100
Feb 17 16:02:50 octagon kernel[0]: ** ASIC Hang Log Start **
Feb 17 16:02:35 octagon kernel[0]: 860:0x02090000
Feb 17 16:02:35 octagon kernel[0]: 861:0x00002808
Feb 17 16:02:35 octagon kernel[0]: 862:0x00020004
Feb 17 16:02:35 octagon kernel[0]: 863:0x00100000
Feb 17 16:02:35 octagon kernel[0]: 864:0x00840000
Feb 17 16:02:35 octagon kernel[0]: 865:0x00008020
Feb 17 16:02:35 octagon kernel[0]: 866:0x00100000
Feb 17 16:02:35 octagon kernel[0]: 867:0x0a040000
Feb 17 16:02:35 octagon kernel[0]: 868:0x00010000
Feb 17 16:02:35 octagon kernel[0]: 869:0x00002808
Feb 17 16:02:35 octagon kernel[0]: 870:0x00020004
Feb 17 16:02:35 octagon kernel[0]: 871:0x00100000
Feb 17 16:02:35 octagon kernel[0]: 872:0x00040000
Feb 17 16:02:35 octagon kernel[0]: 873:0x00008024
Feb 17 16:02:35 octagon kernel[0]: 874:0x00100100
Feb 17 16:02:35 octagon kernel[0]: 875:0x0a040000
Feb 17 16:02:35 octagon kernel[0]: 876:0x02090000
Feb 17 16:02:35 octagon kernel[0]: 877:0x00002808
Feb 17 16:02:35 octagon kernel[0]: 878:0x00020004
Feb 17 16:02:35 octagon kernel[0]: 879:0x00100000
Feb 17 16:02:35 octagon kernel[0]: 880:0x00840000
Feb 17 16:02:35 octagon kernel[0]: 881:0x00009020
Feb 17 16:02:35 octagon kernel[0]: 882:0x00100000
Feb 17 16:02:35 octagon kernel[0]: 883:0x0a040000
Feb 17 16:02:35 octagon kernel[0]: 884:0x02090000
Feb 17 16:02:36 octagon kernel[0]: 885:0x00002808
Feb 17 16:02:36 octagon kernel[0]: 886:0x00020004
Feb 17 16:02:36 octagon kernel[0]: 887:0x00100000
Feb 17 16:02:36 octagon kernel[0]: 888:0x00840100
Needless to say I had to hard reset....

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    NVIDIA GeForce GT 120 Graphics Upgrade Kit for Mac Pro (early 2009)
    View all Questions
    It as well as the much better 4870 both work with the Mac Pro 1,1 & 2,1
    NVIDIA GeForce GT 120 Graphics Upgrade Kit for Mac Pro (early 2009)
    The NVIDIA GeForce GT 120 includes 512MB of GDDR3 memory, uses the PCI Express 2.0 interface, and includes one Mini DisplayPort and one dual-link DVI port.
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    Overview
    The NVIDIA GeForce GT 120 with 512 MB of GDDR3 memory delivers excellent all-around performance whether your playing games or dealing with creative and scientific applications. With up to four NVIDIA GeForce GT 120 graphics cards installed, a Mac Pro can support up to eight displays simultaneously.
    NVIDIA GeForce GT 120 includes two video ports: one Mini DisplayPort and one dual-link DVI port. This allows you to connect both the 24-inch Apple LED Cinema Display or another Mini DisplayPort-based display, and a DVI-based display such as the 30-inch Apple Cinema HD Display. Display adapters are available to connect VGA displays.
    Good Luck man
    Thomas

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