My daughter is running WOW on an iMac core 2 duo with 4 gigs of ram. After doing the latest game update, she is getting a frame rate of 13 with the graphics turned down. Has she about reached the end of the line with that set up or would adding more memory help. The machine is at least 2 years old and I forgot to ask what video card she has.
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May the (mass times acceleration) be with you.