Hello, all the searching I did couldn't find a problem similar to mine, nor did their solutions help anyway, so thanks for taking the time to read my problem :) Related Components: Geforce 9800 GTX+ with two NEC LCD1912 attached via DVI to VGA adapter GA-MA785HM-US2H Motherboard with onboard Raedon HD 4200 with an old CRT Attached via VGA Windows 7 64bit Ultimate All Drivers updated yesterday, both WDDM 1.1 The problem I'm having is: When both display adapters are enabled in windows, windows makes the "device connect" and "device disconnect" noise in a loop, while all 3 monitors blink as if they are having their resolutions adjusted constantly. This stops when I log off. During the loop, If I have device manager open, my displays (for which there are vista/7 drivers, all are "Generic pnp monitor") will show a yellow exclamation point for a random combination of 1-3 of the monitors (the ones with the exclamation point change every cycle). I've managed to see the exclamation point error once, it was: "Windows cannot load the device driver for this hardware because a previous instance of the device driver is still in memory. (Code 38)" Once when logging off, my primary display switched to one of the monitors attached to the Nvidia card (where I want it, anyway, and where it is when the Raedon is disabled). When I logged back on, the problem had fixed itself- until I opened the screen resolution control panel. Whenever I enable the Raedon in device manager, the primary display changes back to it, and the problem resumes. My BIOS is set to initalize the raedon first, otherwise windows will not see the card at all (solved from another thread). My motherboard also has a DVI port, but for some reason, it is missing some holes in the female connector (useless pins by the flat piece, but it is preventing me from using an adapter on that port to try it) Very strange and the whole thing seems rather haunted! Thanks for any help! :)

Your situation is not helped by having two different brands of video cards/chips. The mix of two different brand drivers is not recommended in any discussions I have ever read on multiple dispalys.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

That certianly seems like it would be a problem, and probably isn't making things easier- but is supposedly technically possible. I can't find where, but i do remember reading posts about people having BETTER luck with two different card manufacturers when attempting a triple monitor display without SLI/Crossfire (not possible across manufacturers anyway) This whitepaper on page 87 mentions windows 7's capability of "Heterogeneous multi-adapter". I've read elsewhere the only requirement of this is that all drivers use WDDM 1.1, and according to my dxdiag, they are. http://www.microsoft.com/whdc/device/display/GraphicsGuideWin7.mspx Unfortunately most of that document is beyond my understanding =\

OK, it appears I have solved the problem- I can only adjust display settings (windows screen resolution) with the CRT connected to the Onboard Raedon turned OFF. Once the setting has been applied, I can turn it back on. Maybe monitor is not pnp? Anyway, Turning the monitor off stops the loop. I'm going to go with the monitor as the problem, thanks for listening, internet.