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OCZ PC3-12800 OCZ3X1600LV4GK Intel XMP 2x2GB Review

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Many people believe that memory modules all perform the same, but this is not true. Every module overclocks and performs differently. You want to get the best for your money and there are many ways to test what memory performs best. In order to test the OCX XMP modules, I will be running them through the OverclockersClub suite of benchmarks to see how the performance compares to that of modules that are rated at both a lower and higher rated speed, but with similar timings of 8-8-8-24. The CPU is run at a clock speed of 200 x 16 on the Patriot modules, while the Corsair and Kingston modules are run with the CPU at 160 x 20 with the memory multiplier of 10 to keep the modules at their rated 1600MHz speed. For the overclocking test, I will use a combination of voltages and increasing the bclock on the CPU to increase the clock speed of the OCZ XMP modules to see if they are capable of reaching higher speeds.

Testing Setup:

Comparison Modules:

CPU-Z: This application shows us the settings that we have chosen in the BIOS. Items shown in this application include CPU speed and bus settings, motherboard manufacturer, BIOS revisions, memory timings, and SPD chip information.




Task Manager: We use this utility to show physical memory, kernel memory, page file, and processor usage.


Overclocked settings:

  • Processor: Intel Core i5 750 175x20
  • Memory: OCZ Intel XMP 8-8-8-24 877MHz

Overclocking the OCZ modules was, to be honest, a bit difficult since they really did not want to play nice to far above the rated 1600MHz. Overclocking on any piece of hardware does not come with guarantees. The only guarantees you get are that a product will perform as advertised. The OCZ modules are meant to be used with Intel socket 1156 Core i5/i7 processors and feature two XMP(Extreme Memory Profile) profiles, one that operates at 1600MHz, and the other for 1800 MHz, and the memory would work when either profiles were invoked in the BIOS. However, change one setting and you were in for a failure in MemTest version 4.0. After trying to manually duplicate all of the timings that are set with the XMP profile, I could not manually get the modules to 1800MHz, but could get to 1750MHz, a 150MHz (75MHz) improvement over the stock 1600MHz speeds. Voltages, timings, the latest BIOS for the Maximus III Formula, nothing helped. However, back at the 1600MHz level, I could run the timings at 7-7-7 without any issues up to 1622MHz. These modules did not give up a lot of headroom for overclocking, but they at least allow you to tighten the latencies for increased performance. This is the second set of 1600MHz modules that I have tested, that has not broken the 2000MHz barrier on the P55 platform, although the other was two modules out of triple channel kit.



The benchmarks used in this review include the following:


  • CPU-Z Version 1.52
  • Windows Task Manager
  • PCMark Vantage
  • SiSoft Sandra 2009
  • Left 4 Dead


  1. Introduction & Closer Look
  2. Specifications & Features
  3. Testing: Setup & Overclocking
  4. Testing: PCMarks Vantage, Sandra
  5. Testing: Left 4 Dead
  6. Conclusion
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