Ive been looking into this problem for a couple of days now and this perticular forum came up alot in my searching so I figured I'd join to see if someone can help me out here.
I have an old Gateway 700s LTD That I've kept around so the kids dont mess up my laptop for the third time. (still got one sitting around with a broken connection on the motherboard from being dropped lol) They use it for web browsing and school projects. It does well enough on those the only problem is with video playback and flash based sites with games they visit.
When I uninstall the correct drivers and use the default microsoft standard vga driver the computer boots up fine.
This old computer is running Windows 7 Ultimate
80gb hard drive
450w 35 dollar special power supply
Intel board D850GB
1.8ghz pentium 4 proccessor
According to Gateway site my Bios is up to date, but looking at the intel site my bios is several steps behind. I cannot update to the newest bios intel has for the D850GB board because in windows it keeps saying there is an install error and the bios is not the correct version for my system.
According to Intel my chipset drivers are up to date.
After alot more reading online including this forum I found the fix. It was as "simple" as updating the BIOS.
See this was an old gateway computer so the intel BIOS files did not want to load. I sumply put the computer into recovery BIOS mode by taking out the bios jumper on the board to make it take the BIOS update from intel.
I installed the oldest intel BIOS file first followed by the latest. After that the card works fine.