Let me begin by saying that I am not very computer savy. My friend gave me a practically brand new ATI radeon 5770. I currently have this computer

http://reviews.cnet.com/desktops/gateway-dx-4720-03/4507-3118_7-33317067.html

the only reason I have not installed the graphics card yet is because of the power supply. My current computer has only 350w while the graphics card needs a minimum of 450w. Can I buy this power supply and install it in my computer to use the ATI radeon 5770? Are there any problems with this plan of action? Thanks.

http://www.amazon.com/Antec-VP-450-Energy-Certified-Supply/dp/B004IZN3K2/ref=cm_cr_pr_product_top

http://www.gamesas.com/topic/1368710-the-community-tech-thread-no-114/

That's the proper place for this.