If I stay with the single 4890, how much would a 5 series card run that had equal or greater performance? I know they haven't said much about them, but can someone guess?
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CPU| Unlocked Phenom II B50 Quad Core GPU| OC Sapphire 4890 RAM| 4GB DDR2 PSU| OCZ 700w Case| Antec 900 Monitor| 22'' Asus 1080p
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