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What is the reasonable choice of memory for DZ77GA-70K + Intel 3770K nowadays? this MB supports for DDR3 1066 MHz to +2400 MHz.

  • Is it worth to buy memory faster 1600MHz?
  • Should it support XMP?
  • should it be dual channel?
  • should it be the same model (I have 16Gb and need additional 16Gb but ready to buy 32 if answer is Yes)?

"Should" here means - is it worth? Because three years ago I encountered posts that say Intel processors do not leverage increase of frequency according to price differences. Is it true for nowadays?

  • Memory these days is dual channel, you don't have a choice. see the Intel page for tested memory for that board Yes 1600 mhz will be faster than 1300. – Moab Jul 4 '15 at 0:10
  • "XMP version 1.3 performance profile support for memory speeds above 1600 MHz" from the link i posted. – Moab Jul 4 '15 at 0:14
  • "Worth" can only be determined by you. – Moab Jul 4 '15 at 0:15
  • Not sure how this question was interpreted as merely a shopping recommendation? Surely the dot points imply it is looking for analysis on how to choose suitable RAM? "Reasonable choice" doesn't necessarily mean "tell me an exact model". – Ash Jul 4 '15 at 8:59
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It depends on a number of factors, but in general: no, RAM faster than 1600MHz doesn't give you much of a boost. If the price was the same and you were interested in RAM overclocking, sure grab a 2400MHz kit, but otherwise 1600MHz will likely be just as good.

Some of the factors are:

  • What tasks are you running (rendering? gaming? office stuff?);
  • If gaming, is the game CPU-bound or GPU-bound (the former may benefit from faster RAM, but even then most don't);
  • Are you using onboard graphics or a dedicated GPU? Intel onboard doesn't seem to scale like AMD APUs with RAM speeds, but may make a difference.

A couple of articles using the 3770K that show 1600 more or less the same as 2400 except in some specialised cases:

On expansion: Try and run in dual-channel. If using existing RAM, try and match the specs as closely as possible with any new RAM you buy. Keep the paired sticks running in corresponding dual-channel slots. While DDR3 incompatibility seems relatively rare, there is no guarantee separately purchased sticks will work together -- you'd need a manufacturer-tested 4x8GB kit to get that guarantee.

When looking for RAM compatibility, Intel's list is pretty limited. RAM suppliers often have their own lists. (As an example, the listing for G-Skill Ares has your motherboard in the QVL).

  • This is as good an answer as you can get. – misha256 Jul 4 '15 at 1:04

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