High Quality Content by WIKIPEDIA articles! Write combining (WC) is a computer bus technique for allowing data to be combined and temporarily stored in a buffer -- the write combine buffer (WCB) -- to be released together later in burst mode instead of writing (immediately) as single bits or small chunks. Write combining cannot be used for general memory access (data or code regions) due to the 'weak ordering'. Write-combining does not guarantee that the combination of writes and reads is done in the correct order. For example, a Write/Read/Write combination to a specific address would lead to the write combining order of Read/Write/Write which can lead to obtaining wrong values with the first read (which potentially relies on the write before).

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