Matrox G450 DualHead DVI PCI does't work properly for multiple monitors

[neil22]

I have a AGP dual head Nvidia GEForce FX 5200 driving a DVI monitor and a VGA monitor. But I want to add a 3rd and 4th Monitor, so bought the PCI Matrox G450 DualHead DVI PCI



The PCI card seems to require it boots first in the bios, so I set that. I plugged in a 3rd monitor to the new card, and that’s where the display shows when booting.



Using Windows XP I can see and align all 3 monitors. But the new card is only showing max resolution of 4 colors at 800*600 whereas obviously I want 1280*1024 at 32-bit colors. It also seems to cause some downgrade of resolution on existing monitors (i.e other graphics card – mainly showing each of the screen icons in a black background around each icon.



I’ve updated drivers, but that did not solve problem. Any ideas ? I suspect if screen resolution problem can be solved, then icons will be correct also.

[Kruzin]

Try removing the Nvidia card, all Nvidia drivers, get the G450 running right, then put the NV back in.

[neil22]

Okay, guess that's an idea, but I worry about screwing my entire system. Any other ideas - must be a clue that the matrox card actually works & displays; but only allows 800*600 in 4 colors. However, I have updated the drivers, so don't see that as problem

[Mikko]

You should try what Kruzin already suggested...
Also, re-install chipset drivers for your motherboard.