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Downclocking my RAM

  • Corsair
  • DDR3
  • Memory
Last response: in Memory
August 16, 2012 9:27:17 PM

Hello everyone, If I were to get...

CORSAIR Vengeance 16GB (2 x 8GB)
-DDR3 2133
-Timing 10-11-11-31
-Cas Latency 10
-Voltage 1.5V

and then downclock that to DDR3 1600, would it have better results than getting...

CORSAIR Vengeance 16GB (2 x 8GB)
-DDR3 1600
-Timing 9-9-9-24
-Cas Latency 9
-Voltage 1.5V

Your help would be much appriciated as I am still not sure what RAM I should be getting ASUS Maximus V FORMULA MOBO and Intel Core i7-3770K Ivy Bridge 3.5GHz (3.9GHz Turbo) CPU.

More about : downclocking ram

August 16, 2012 9:35:19 PM

maybe theoretically; but practically no.

You may be able to manually squeeze out different timings, but if your"results" are practical benchmarks; then no matter what you pick for timings you get at best 1-2% difference in real-world applications.

read anandtech article:

save your money and spend it elsewhere
a c 252 } Memory
August 16, 2012 9:38:06 PM

no it will not.

The Corsair Vengeance 2133 memory modules usually contain standard JEDEC profiles for DDR3-800, DDR3-1066, and DDR3-1333, as well as XMP profiles for DDR3-1600, DDR3-1866, and DDR3-2133.

For information on what the standard JEDEC profiles are, see this wiki page

Since DDR3-1600 is natively supported on all modern processors it may be written as a JEDEC profile on some memory module rather than an XMP profile. Similarly, it is very common for DDR3-1600+ modules to put the DDR3-1600+ profiles in XMP even if they conform to the JEDEC standard.

The difference between the two is that the highest natively supported JEDEC profile will be selected automatically. XMP profiles will never be selected automatically and must be enabled manually in BIOS/EFI setup. XMP profiles may use non-standard timings and voltages, JEDEC profiles will always use standard timings and voltages.

Anyway, your DDR3-2133 modules will most likely contain the profile necessary to run at DDR3-1600 speeds which will make it identical to the second one that you listed.
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a b } Memory
August 16, 2012 9:44:45 PM

Having higher clock capable RAM ensures that when you overclock, you have some room to play with on memory dividers and frequencies. Running it at 2133 even with an over clocked Ivy Bridge doesn't yield a lot of gains (very very small gains), see Tomshardware review:

August 16, 2012 9:48:29 PM

Ok, just what I needed to hear. Thanks a bunch for the info!