Is the hp pavillion elite 9220f desktop, which only has 1 16X pci slot but extra 3 X1 pci slots( should be enough actual room), able to use Zotac Geforce GTS 450 (1Gb GDDR5) which requires 2 16X pci slots. i do know about power supply upgrade. i have this desktop im just not at home for thanksgiving. thanks for help. just need to know if there is enough room and it will actually work.