What kind of power regulator will you recommend for an vintage Mac Pro tower with 2 displays?

What kind of power regulator will you recommend for an vintage Mac Pro tower with 2 displays?

Cyberpower 1500VA UPS ~$200

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    a
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    ---------- NOTES: ----------
    [1]: I can connect via SSH on the command line to the Mac. However, the GUI environment seems borked; opening apps or trying to gracefully quit them via AppleScript either does not work or really hard freezes everything, such that SSH no longer works either.
    [2]: A similar (but perhaps different) issue affecting notebooks is discussed here, and there are some people with Mac Pros, too: http://discussions.apple.com/thread.jspa?messageID=6786960
    [3]: The Folding @ Home client, which can be used to trigger this bug, can be gotten here: http://folding.stanford.edu/English/Download
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    Hello guys, thank you for the replies.
    I do have more data at this point.
    ujeezy: Those posts on MacNN and others like them did give some clues.
    Jon BWFC: I think you are (partly) right that it's (partly) an issue with the driver. But I have confirmed with a fair degree of certainty in my case that it is a hardware issue too, likely with the video card and not the Mac Pro itself.
    cmcom: I think it sounds like you problem is different than the one we're talking about (although who knows, the driver could be causing that too). The freeze we are seeing locks up the whole Mac, and no application crash report is produced.
    I had another GeForce 8800 card, so I went through some exhaustive troubleshooting. I tested each card, installed in each of the 16x slots, booting from either my normal 10.5.2 boot disk or a clone of the pristine virgin system disk that shipped with the Mac, and tried to see if the Mac would crash.
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    So the upshot is, all those times I was using Folding@home to test this issue were bogus, because Folding@home crashes any Mac Pro with the NVIDIA card, and crashes MacBook Pro machines with NVIDIA chips as well.
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    Whew! So, I concluded that indeed, there is a hardware defect in one of my GeForce 8800 cards which causes the machine to lock up. [2]
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    So, when there is a bona-fide hardware defect, it is really hard to isolate. (It took me like four days.)
    The thing is, the defective NVIDIA card that crashes the Mac[2] was a REPLACEMENT card for the 8800 card that shipped with my Mac. I called Apple about the video artifacts I was seeing and they replaced the card.
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    c.) a hardware defect in the Mac itself
    I strongly suspect A, but hopefully my buying a different card and testing with that will help further isolate what is wrong.
    I am marking this thread "solved" because the specific issue I originally posted about has been resolved: the GeForce 8800 card causing the crashes is defective, and using another card fixes that issue.
    [1]: The original GeForce 8800 card that shipped with my Mac Pro exhibited annoying-but-not-deadly video artifacts, which can be seen here: http://masonmark.com/wp-content/uploads/2008/04/bogusvideoartifacts.jpg
    [2]: Apple replaced the video card, and that is when my deadly video-corruption-plus-frozen-Mac crash problem began. A screenshot example of that problem can be seen here: http://masonmark.com/wp-content/uploads/2008/04/crashedmac_pro_akashitball.jpg
    [3]: The red herring in this case was the Mac OS X bug (seemingly specific to NVIDIA-equipped Macs including Mac Pro and MacBook Pro) that causes a very similar full system crash. This bug can easily be triggered by running the Folding@home version "6.10beta2" demo application. That is a serious bug, and since my employer is a Mac software company I reported this bug to Apple via the official channel. It is Apple bug number 5830772.
    [4]: The OpenGL fish tank simulator I found, which would trigger the system crash caused by my defective 8800 video card (but would not crash any other Mac, or crash my Mac Pro with the other 8800 video card installed) can be found at: http://uri.cat/software/Fish/

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