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Source :
http://www.hardmac.com/news/2009/12/14/a-test-where-the-mac-pro-wins-out-against-the-imac-core-i7[/SIZE]
Rob Art has made a strange observation. The iMac Core i7 is faster in its basic configuration of 4 GB than with 8,12 or 16 GB. The difference is not enormous, approximately 6 to 7% under After Effects, but sufficient to be noted. Other memory tests confirm that the memory bandwidth is higher with the memory banks filled in a homogeneous way (either two identical bars, or 4 identical). But all cases, beyond two bars, the memory bandwidth drops a little. …
