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Let's discuss Burst length of DDR or SDR

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heartfree

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For DDR, let's compare burst length = 2 and burst length =4, what's the shortcoming and merit.
 

I think burst size four is common. Intel Pentiums II and III had cache blocks of length 32 bytes. Since the system (memory) bus is 8 bytes, a burst of 4 yields 4x8=32 bytes, exactly enough to fill a cache block.
 

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