Hi
By dual do you mean two Nvidia cards? If yes did both die?
You cannot use 1 Nvidia and 1 ATi cards together, you have to use 2 Nvidia or 2 ATi cards.
Also the motherboard needs to support SLI for Nvidia and Crossfire for ATi.
Hi
As long as the motherboard has got 1 PCI Express 16X, 1 card should work.
If the motherboard has 2 PCI Express 16X slots it will work if the motherboard supports SLI.
What is the model no of your Packard Bell or Name of the computer.
Hi
I was just wondering if you were gonna change the graphics card also, but it should be ok for now.
What PSU do you have now?
You'll have to setup a dual boot setup with XP and Windows 7.
Hi
I am more of an Intel fan myself but AMD is cheaper. That looks ok. Are you gonna upgrade the graphics card also? Asus is always a good choice.
Whatever you get post here if you need any help installing the components.
Hi
I don't know if this will make a difference, but try installing updated motherboard chipset drivers.
My first thoughts were a failing motherboard, since you changed RAM and HDD already, but you say it works fine in safe mode.