Im putting together a cheapo computer from parts that I have around to run a small router.  And it has onboard video, so I ran the driver test and it was ugly!  So installed a cheap ATI video card and looks like Mach will like this computer now.  It's a Celeron 1.1Ghz just enough to run Mach.

I have had the same problem in the past

Glad to hear that you got it working!

Some mobos with onboard video seem to work fine, but also had a few that like yours were horrific in the drive test. I think the ones I had that were OK had nForce chipsets but whether other mobos with the same chipsets would be OK is a case for trial and error
Hood