Should I Add Up Gtx 660 Graphics Card with Xeon X566p Processor

[BIlal khan]

I Am Planning To Buy A GTX 660 2gb
I Have These Specs:
Hp Z400 Workstation
Xeon X5660
8gb Ddr3 1033 mhz ram
475 watts psu
Will There Be Any Bottleneckin problem or It will work just fine?

 

[LTC8K6]

PSU might be a little weak, especially if it's the original one?