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Topics - gravitonfield

#1
Greetings.
I have a voodoo 4 mac/dvi that I finally got around to flashing for PC. I used the voodoo4 4500 pci 1.18 dvi bios available at:
http://www.tdfx.de/ger/dload_bios_v5.shtml
(same bios available at 3dfxbios.cl-rahden.de).

The card works perfectly in ALL aspects (glide, 2D through VGA port) except for 1 main issue- the DVI output begins to act up beyond a resolution of 800x600. The higher res I go, the more issues crop up. The colors look right though.
- At 1024x768 - the screen may flicker after several seconds, and there are slight reddish artifacts scattered about.
- At 1280x1024, the screen flickers more, the mouse cursor continually flickers and mouse cannot be moved.
- Eventually, at higher resolutions, it crashes.
I've tried several different DVI cables (dual-link, single-link DVI-D) with no difference.
Tried different versions of voodoo drivers (e.g. 1.04.01-beta, 3dhq 1.09 beta10) to no avail.
Ran every graphic card diagnostics software you can think of (memory test etc) which all checks out.

I am thinking either the bios or driver may be the culprit (as early DVI implementations were known to be problematic, see http://www.playtool.com/pages/dvicompat/dvi.html#pixelclock), but cannot confirm.

I suspect the voodoo 4500 PCI w/DVI bios that has circulated around is that of a prototype card. It is labeled as "Voodoo4 4500 LCD" when examining in Tdfx bios editor, something that is almost never seen for voodoo card (not even for v5 5500 dvi). Also as far as I know, only other time "LCD" was mentioned in bios string was prototype voodoo 4500:
http://www.3dfxzone.it/enboard/topic.asp?TOPIC_ID=377&whichpage=1
(bios screen here https://web.archive.org/web/20031119064033/sloomy.kolayweb.com/DSCN0061.JPG )

As I was hoping to try to keep the card closer to stock bios, I haven't tried that custom v4 dvi bios w/ editor screen (made by Rainbow, version 1.18B04).

I'm wondering if anybody with voodoo 4500 dvi has had similar issue with DVI output? If so any suggestion?
Should I have reason to believe there is a hardware issue in my card?
Thanks in advance.