Question about HD 6770

Why does it says it has a memory of 2.7gb on dxdiag and on canyourunit site? It was only 1gb when my OS was still XP then when I installed windows 7 it changed into that.

another question Is the 600w atx PSU that is included in the casing that i bought enough for this card or should I buy a better PSU?
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More about question 6770
  1. dxdiag is reporting wrong in win vista and 7. ignore it.

    600w is plenty. unless you have a dozen HDD or some other excess.
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