Ironhide

okay so im looking at: SAPPHIRE 100287VGAL Radeon HD 5670 (Redwood) 512MB 128-bit DDR5 PCI Express 2.1 x16 HDCP Ready Video Card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102871&nm_mc=OTC-pr1c3grabb3r&cm_mmc=OTC-pr1c3grabb3r-_-Video+Cards-_-Sapphire+Tech-_-14102871ne and a psu with 700w http://www.newegg.com/Product/Product.aspx?Item=N82E16817182173&cm_sp=Cat_Power_Supplies-_-Weekly_Deals-_-17-182-173 is this all i need will it work with my specs

Thank you and my PSU^

Power AC 120/230 V ( 50/60 Hz ) Power Provided 300.0 Watt

I am wanting to get a new graphics card because mines a little out of date(07) i've been pc gaming since 2007 but i know little about computers and if a graphics card is compatible with my computer any help on a good gaming graphics card? I normally play COD: MW2 but Mw3 is coming out in nov. System Man.: Dell Inc. System Model: Inspiron 530 Processor: Intel® Core2 Duo CPU E7400 @ 2.80GHz(2 CPUs), ~2.8GHz Memory: 3326MB RAM Graphics Card: ATI Radeon HD 3400 Series