Which one!? MSI N460GTX Hawk VS Galaxy GeForce GTX560 GC 1GB

[stan19949]

I have a Dell XPS8100 wanting to upgrade them to either one of them. (willing to buy another PSU)
My PC has 350Watt PSU, 8GB DDR3 RAM, i5 CPU

http://www.dell.com/us/p/studio-xps-8100/pd

Which one will perform better? and Will they even work for my XPS8100?
Any one got any other better suggestions??

 

[omnisome]

You really need a new power supply unit before you can get one of those cards.