My office workstation is running an nForce 430 motherboard which has an onboard GeForce 6100 GPU. I also have a PCIe GeForce 6200, so I haven't previously used the onboard GPU. I have had two identical 19" LCDs (Viewsonic Optiquest Q97) connected to the PCIe card for a long time, both running at their native resolution of 1280x1024.
We recently got a few extra 19" wide (Acer P191w) monitors, and one was given to me, so I decided to hook up a third monitor. I removed one of the Optiquests from the PCIe card's DVI port and connected the Acer in its place, then plugged the Optiquest into the onboard VGA port and enabled the onboard GPU in the BIOS. Booted back up, Windows XP detected the Geforce 6100 GPU correctly, and I successfully extended my desktop to the third monitor. The Optiquest monitor on the onboard GPU defaulted to 640x480, so I put it back up to its native 1280x1024 - and then it displayed nothing. However, if I bring it down one notch to 1280x960, it will display again, but it looks "off" since it's not the native resolution.
So, I have a monitor which is known to work just fine at its native 1280x1024, however with it connected to the onboard Geforce 6100, I cannot run it any higher than 1280x960. At 1280x1024, I have a blank screen but the monitor never goes into standby mode, so it is obviously still getting some kind of VGA signal.
According to NVIDIA, the GeForce 6100 has a 300MHz RAMDAC, thus it should be able to display up to 1920x1440@75Hz (link). So, this has me stumped. Any thoughts?
We recently got a few extra 19" wide (Acer P191w) monitors, and one was given to me, so I decided to hook up a third monitor. I removed one of the Optiquests from the PCIe card's DVI port and connected the Acer in its place, then plugged the Optiquest into the onboard VGA port and enabled the onboard GPU in the BIOS. Booted back up, Windows XP detected the Geforce 6100 GPU correctly, and I successfully extended my desktop to the third monitor. The Optiquest monitor on the onboard GPU defaulted to 640x480, so I put it back up to its native 1280x1024 - and then it displayed nothing. However, if I bring it down one notch to 1280x960, it will display again, but it looks "off" since it's not the native resolution.
So, I have a monitor which is known to work just fine at its native 1280x1024, however with it connected to the onboard Geforce 6100, I cannot run it any higher than 1280x960. At 1280x1024, I have a blank screen but the monitor never goes into standby mode, so it is obviously still getting some kind of VGA signal.
According to NVIDIA, the GeForce 6100 has a 300MHz RAMDAC, thus it should be able to display up to 1920x1440@75Hz (link). So, this has me stumped. Any thoughts?
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