Question Are my two 2gb ram sticks fake

[Luger1945]

I have downloaded CPU-Z And check that both of my rams have 667mhz each , and when I check bios or Task manager it says I have frequency of 1333mhz

Can those rams have been modified so they can show 1333mhz of frequency instead of 667mhz?

Here image for refference
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Image x hosted in ImgBB

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[USAFRet]

DDR = Double Data Rate.
https://en.wikipedia.org/wiki/Double_data_rate

667 * 2 = 1333

All is at it should be.