Looking to upgrade my graphics card needs some help

Whats the difference between these cards SAPPHIRE Radeon HD 6670 1GB 128-bit DDR3 PCI Express 2.1 x16 HDCP Ready Video Card and SAPPHIRE Radeon HD 6570 GB DDR3 PCI Express 2.1 x16 HDCP Ready Video Card which one is the better card?

my PC specs

Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz
Ram 3GB
OS Microsoft Windows XP Professional Service Pack 3 (build 2600)
Video Card ATI Radeon HD5450
4 answers Last reply Best Answer
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  1. Best answer
    SAPPHIRE Radeon HD 6670 is a little better. Take a look
  2. The Saphire HD 6670 is better.
    But it you're buying it, get the GDDR5 version and not the GDDR3.
    A GDDR3 card is a bit slower than GDDR5 card, considering the bandwidth.
  3. You can spend little extra and get the top line 7750 which does not require external power.

    and this is how better it is over 6670
  4. Best answer selected by bullock31.
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