I started with this :
CPU AMD PNENOM 8450 (X3)
Motheboard GIGABYTE GA-MA78GM-S2H AM2+ ATX
Realtek ALC889A codec + High Definition Audio
ATI Radeon 451 3200 graphics card
Hauppauge WinTV-HVR 1800 MCE Kit 1128 PCI-Express x1 Interface
Gigabyte has an x1 and x16 PCIE. First card went into x1
Got this one on ebay (Nationwide Surplus) for 16.49 + free shipping. Its an OEM version of the above with only antennae inputs
Hauppauge WinTV-HVR 1800 PCI-Express x1
But this card into the PCIE x16 slot, windows 7 recognized it and installed the driver.
went into MCE and tasks , setup and reran TV configuration
Tested recording 2 HD shows at once
With PCI-E, you can put a x1 into an x4, x8 or x16 slot!