Z87-G45 Memory Placement

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scole of TSBT
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#21 Re: Z87-G45 Memory Placement

Post by scole of TSBT »

Looks like it's all running at 1600Mhz then.

In case anyone was curious why it's reported at 800Mhz instead of 1600Mhz, like me, this is from tomshardware.com....

"DDR" means Double Data Rate".

CPU-Z reports the raw DRAM frequency x 2 = effective data rate.

What you're seeing is simply a difference in nomenclature.

"DRAM Frequency" in CPU-Z means one thing; "DRAM Frequency" in your BIOS means TWICE that!

If you were viewing the memory clock as a sine wave, you would have 1 peak and 1 trough for every cycle: that's how DDR works: it transmits data once for each rise in voltage and once again for every drop in voltage.

Of course, the sine wave analogy is "analog" --whereas DRAM is digital -- more like a "step function" as opposed to a smooth undulating "wave".

Because CPU-Z has become a de facto standard, get used to the tables produced with the "Memory" and "SPD" tabs in that fine program.
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leecarver
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#22 Re: Z87-G45 Memory Placement

Post by leecarver »

Thanks for the reply, scole! I'm going to keep my fingers cross these two will play nice with each other going forward.

And am certainly glad to have CPU-Z as a new tool to understand and utilize.
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