as the OEM license lives and dies with the computer and the motherboard is the component that defines the computer.
Additionally, the system would likely not even boot as the old drivers would not support the new board.
If you want to upgrade board and components you will need to invest in another copy of the OS.
If you only need better graphics, what expansion slots are available on your current motherboard? If it has available expansions slots you should easily find a graphic card that you can use with the existing system. If not being used by other paddle cards that board should have:
1 x PCI Express x16 slot (also runs in x8 mode)
1 x PCI Express x1 slot
2 x PCI slots
I have an emachines t5234 which has an ECS MCP61pm-am motherboard running an athlon 64 x2 4000+ processor with Windows Vista Home Premium. I want to upgrade my motherboard mostly for the sake of running a media center and I would need newer better graphical capability. Iwas never given system disks when I purchased the computer. I figured I could Simply swap mbs, plug everything back in and it would run off my old harddrive just the same??? I have since heard that this is not possible. So i have no disk of windows. Does that mean I would have to buy windows thus making this too expensive to be worth it??? In hope someone can tell me this is not true or that there is indeed a way! If it matters my hd is sata.