Intel optimization guides and presentations mention many types of memory access buffers. These include Fill Buffers (mentioned in therecent Optimization Manual), Write Combining Buffers (mentioned in the same document), Write Buffers (mentioned in the not-so-recent Optimization Manual), and Write-Back Buffers (mentioned in this Pentium 3 review by AnandTech). Are those just different names for the same buffers? If no, what is the difference between them?
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