RAMpedia - DDR2 Attibutes

Intel DDR2-400 chipset: E7320, E7520	AMD DDR2-533/667 Opteron Rev F
Separate memory controller chipset	Integrated, on-die memory controller optimizes memory performance and bandwidth per CPU. Memory bandwidth scales with the number of processors.
DDR2-400	DDR2-533/667
4 chip selects per channel	8 chip selects per channel
supports up to four registered 2-rank DIMMs	supports up to four unbuffered 2-rank DIMMs or eight registered 2-rank DIMMs
ECC single-bit correct	ECC checking with double-bit detect and single-bit correct
chipkill support using DIMMs with x4 DRAM	On-line spare feature provides single-rank DRAM redundancy
16GB per chipset using 4GB DIMMs	32GB per processor using 4GB DIMMs