I've recently taken the plunge and upgraded from an agp/ddr mobo to the one mentioned above with pci-e/ddr2/dual core capabilities.
Specs are as follows: Asus p5nsli p4 530 - until i can afford to upgrade further 2x512 matched pair OCZ gold ddr5400 xfx 7600Gt hyper type r 580w psu
After installing/checking connections etc i proceeded to boot up, with the intention of reinstalling windows, i left it with the xp cd in the drive & boot order set and went to make a cuppa. When i returned it had somehow booted into windows and was having difficulty finding drivers.
I rebooted and this time loaded into the xp setup menu, but the screen dissolved into lines and i wasn't able to proceed further, this occurred with both outputs on the gpu.
Further attempts met with all the fans spinning up but no display and no bios beeps no matter the pc configuration.
So far i have tried different psu, 1 stick of ram/no ram, a pci graphics card, minimal configuration etc to no avail. The one thing i have noticed is if i power up with the ide cable to my hdrive disconnected, it spins up, with it connected it doesn't, also it refuses to shut down via the case power button i have to use the psu switch.
AM i looking at a dead motherboard? I have no real way atm of testing the gpu or the ram.