Can I Use this graphics card

Hi, i recently bought a new desktop, and the gpu is really bad its the amd radeon hd 7450, and i wanted to upgrade my graphics.So i want to get the amd radeon hd 6670 ,and i wanted to know if i could crossfire or if i need to replace the 7450. My pc has a 300watt psu though, and the rest of the specs are here: HP Pavilion HPE H8-1234 AMD FX-6120 3.5 GHz AMD Radeon HD 7450 1GB 10GB DDR3 RAM 1TB 7,200 RPM 300 Watt PSU http://www.tigerdirect.ca/applications/searchtools/item-details.asp?EdpNo=3907687&pagenumber=1&RSort=1&csid=ITD&recordsPerPage=5&body=REVIEWS#CustomerReviewsBlock Thanks
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  1. You can't crossfire the 7450 with the 6670, for a 300w psu either the 6670 or the 7750.
    In my opinion a decent upgrade will be for a 7750, which will run on a 300w psu, maximum tdp of the card is 55W, no auxiliary power needed.
  2. You cannot xfire those cards. Here is a 7750 as an option:

    SAPPHIRE Radeon HD 7750 1GB $104
    http://www.newegg.com/Product/Product.aspx?Item=N82E16814102985
  3. I'd go with the 7750, so you don't have to replace your PSU. Otherwise you'll need to upgrade your PSU and then get a different GPU. Just make sure you get a DDR5 version 7750, if you go that way.

    $100 shipped - $10 MIR = $90!!
    SAPPHIRE Radeon HD 7750 1GB 128-bit GDDR5 PCI Express 3.0 x16 HDCP Ready Video Card ( 11202-00-20G)
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