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-   -   Choosing RAM frequency vs latency ? (http://www.cfd-online.com/Forums/hardware/120685-choosing-ram-frequency-vs-latency.html)

TMC July 12, 2013 04:53

Choosing RAM frequency vs latency ?
 
Hello,

Building a workstation, I'm wondering whether I should go for higher frequency memory or lower latency memory. I mean, most often, these are in contradiction.

Example: Which is faster?
  • 1600 Mhz CL9-9-9-24
  • 2133 Mhz CL11-11-11-27 (XMP)
Are there ways to estimate the speed ratio based on frequency and CL?


Lastly, I read somewhere that one shouldn't choose Corsair Vengeance memories. Any justified reason for it?


Thanks a lot!

evcelica July 12, 2013 16:39

The 2133 has higher speed and should also have lower latency since those 11 clock cycles are at 2133 MHz.
2133 is definately faster and has more bandwidth.

CPUpassmark.com has a lot of RAM benchmarks to check out.

TMC July 12, 2013 19:02

Quote:

Originally Posted by evcelica (Post 439439)
should also have lower latency since those 11 clock cycles are at 2133 MHz.

Many thanks Erik!
I did not remember these figures are clock cycles (was thinking about actual time)...

Well...
11/9 = 1.222..
2133/1600 = 1.333..
So, theoretically, 2133's latency should be ~10% lower than that of 1600. :)


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