|I've tried installing a new GeForce FX 5200 PCI card (not PCI-E) into my XP computer that previously only had motherboard on-board graphics capability. I have installed all relevant software and disabled the old graphics adapter through Device Manager > Display Devices. The computer appears to be recognising the graphics card just fine, however when I try plugging the monitor into the graphics card and turning the computer on a monitor message appears saying "Mode not supported - H:45KHz V:85.7Hz".|
So I'm guessing that the graphics card has defaulted to an 85Hz refresh rate, which my monitor doesn't support.
The strange thing is that even after disabling the original graphics adapter, I can still plug the monitor into the old socket and it continues to work, though only on the lowest resolution and colour depth. Also, if I check Display > Properties > Settings, it shows as though I have a dual monitor setup, though indicates that one of the monitors is unplugged.
I've tried going into the graphics card settings and changing the refresh rate down (I've checked the setup through the original graphics adapter and it was True Colour, 1152x864, 75Hz), but it doesn't seem to make any difference, and in fact half the time when I go back to the settings to check them they have automatically reverted to the 85 Hz refresh rate.
What else can I do?