CPUZ-DRAM says 800mhz SPD max bandwidth says 667

I'm pretty new to building computers. In my Asrock mobo, everything was set to 1600 in the BIOS. It still reads 1600 in bios after i went in there multiple of times. In CPU-Z, the DRAM is 800mhz which seems correct (800x2=1600). What I am confused about is that my SPD max bandwidth says 667mhz. I really don't know what SPD max bandwidth is but I feel like its saying the max my memory can go to is (667mhz X 2)when everything else is registered 1600 (bios/cpu-z DRAM). is SPD bandwidth something i should not be concerned about since both the DRAM frequency is 800mhz and my bios says 1600 for both my corsair vengeance(4gigx2)
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More about cpuz dram 800mhz bandwidth
  1. No need for concern. If cpuz timings match your ram, then you're fine.
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