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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No need for concern. If cpuz timings match your ram, then you're fine.