Graphics Card/PSU Compatability

Okay, so I'm buying a new pre-built Desktop PC:
http://www.overstock.com/Electronics...5/product.html

I'd like to know if my current Graphics Card:
http://www.newegg.com/Product/Produc...82E16814102945

and Power Supply:
http://www.newegg.com/Product/Produc...82E16817371030

Would be compatible with this new PC(Essentially I'm pretty sure they are, but Will they fit?)
Thank you for any information you can provide :)