I just recently placed my old hard drive from an older mobo onto a new one to save time and money from backing up all of my files and buying a new OS, so i did basically everything that i thought i needed to do for my HD to recognize the mobo and boot. Like set all of my bus controllers back to standard so it could recieve the new ones. My old mobo had an AGP 4x/8x interface and my new one is PCIe 16x. So i uninstalled all of my peripheral drivers, and then reinstalled them after i had booted it with the new mobo. The only thing that the software from the mobo manufacturer recognized is that it needed to install the LAN drivers. it didnt ask to install and PCI controllers. So, new hardware manager is telling me that its finding a PCI device and that it needs to install drivers for it, but if it doesnt know what it is then it cant search for it..i've tried looking for nForce PCI System Management drivers, but no luck. my computer recognizes my video card. but its still telling me that there's a PCI device found. i noticed that it had something to do with the PCI controller when i couldnt change the aperture size of my PCI bus. If there's anything any of you would understand about this. it would be very helpful.