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Not quite so many. Each memory operation on modern CPUs is a minimum of 64 bytes, so on DDR4-3200 if you saturate a single 64-bit channel, you get 400 million IOPS.

On DDR5, channels are 32 bits wide, but there are two in a DIMM, so a normal desktop system is actually "quad-channel", with each channel doing up to that 400 million IOPS if the ram speed is DDR5-6400.

In practice, it's of course rare to completely saturate channels, just because of bank conflicts and refreshes, etc.




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