[SOLVED] Ati xfx 5550

[pell380]

hi guys i am looking for a entry level graphic card i play games on low-medium settings i am going to buy ati xfx 5550 1gb ddr3 but this card is pci 2.1 but my mother board has pci x16 my board is intel 955xcs with so this card will worj in my pc?

 

[pell380]

my other options could be 4670(core clock 650mhz) or 9500gt which of these would be better?