Why my DRAM frequency is less than ram speed

parth007

Reputable
Jul 10, 2015
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According to cpu-z My dram frequency is just 399MHz but i am having ddr3 pc3-10700(667Mhz) , i.e my maximum speed should be 1333MHz , Please explain why my dram frequency is much less than maximum speed . I know it should be equal .And also explain how to fix it , if it can be ,
And also tell if 1600Mhz ram will work in my pc , i am having dell inspiron 560s

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Solution
You are running at the mobos default of 800, need to manually set the DRAM data rate, timings and voltage in the BIOS to take it to it's native 1333
because cpu-z is reporting the real clockrate. it doesn't need fixing (unless you're facing instability or any other pc problems). the data rate is twice as the clockrate which is what get's advertised.

the DDR in the DDR2 means double data rate. this means that the data is sent twice per clock signal which as a result doubles the data rate. if the clock rate is 400 mhz, then the data rate is 800 MT/s, for 667 MHz, 1333 MT/s. ddr3, ddr3, ddr4 are the later iteration of ddr sdram.

you can read more on it here:
DDR SDRAM
https://en.wikipedia.org/wiki/DDR_SDRAM