I just installed a GeForce7600, along with a AMD Hammer dual core 2.2 Ghz processor and 1 Gb RAM upgrade.I'm using ActiveSky 6x as my weather engine with FS2k4.The clouds and lights in FS are now pretty funky. The clouds appear in 2D have have a greenish psychodelic pattern to them. Similarly, my landing lights appear out of the cockpit window like greenish lines. Other objects, etc. appear fine. I'm not super computer literate, any ideas out there? All help is appreciated!Ian

Install new drivers. But I would also first install the latest version of the DX9.0c update from the MS websiteOther cause could be that you didn't plug the extra molex connector in that the card requires. It needs a clean power source direct from the PSU.Allcott

Alcott:Will go get DX9.0c and new drivers first. Thanks for the advice, I'll post results if you're interested.Appreciate your expertise.Ian