Eight 8 GB (2 x 4 GB) Memory Kits For P67 Express, Rounded Up

Intel’s newest platform lineup has the same memory requirements as P55 Express, yet some of the modules available for it are rated differently. We discuss those differences on our quest to find the best performance/price in an 8 GB dual-channel kit.

We started getting email announcements of a new generation of LGA 1155-compatible RAM right around the same time as details of Intel's second-gen Core processors surfaced. The funny thing was that Intel’s memory requirements didn't change from Nehalem/Westmere to Sandy Bridge.

The former platform’s documented maximum 1.575 V limit remains, with the same wink-and-a-nod from engineers that up to 1.65 V is safe. Indeed, the memory controller built into Intel's new processors remained substantially similar to that of its predecessor. But as it turns out, the introduction of new kits wasn't entirely marketing hype!

All of Intel’s DDR3 memory ratios correspond to data rate multiples of 266.6 MHz, including officially-supported data rates (DDR3-800, DDR3-1066, and DDR3-1333) as well as unofficial overclocked ratios (DDR3-1600, DDR3-1866, and DDR3-2133). Yet, many of the memory kits designed for LGA 1156-based platforms included oddball ratings like DDR3-2000 and DDR3-2200. In order to achieve DDR3-2000 without overclocking the CPU core, the builder had to set the appropriate ratio for DDR3-1866, raise the base clock by 7.2%, and then reduce the CPU multiplier by 7.2%. With 7.2% multipliers and non-integer base clocks unavailable, an approximation had to be made. Some memory manufacturers even abused Intel’s XMP technology in an effort to tell motherboards how to set these approximations automatically, though the builder still had to choose the appropriate XMP profile in the BIOS.

Intel’s new platform does allow fractional base clock increases, but, as we all know by now, does not support the aggressive base clock adjustments enabled by previous platforms. An increase of 7.2%, for example, is easy to set, but it's usually unstable. By significantly limiting the range of accessible base clock adjustments, Intel invalidated memory ratings that didn’t correspond to appropriate ratios. We interviewed several memory manufacturers at CES and confirmed that transforming LGA 1156-specific memory kits into LGA 1155-oriented models required nothing more than a proper name, and proper SPD and XMP values.

For instance, yesterday's DDR3-2000 becomes DDR3-1866, occasionally at lower latency ratings to help offset the sacrificed data rate. Later, as many builders reported no performance gains or even compromises in stability from increasing the controller's voltage from 1.60 to 1.65 Vs, at least one manufacturer responded by dropping its maximum rating to 1.60 V.

The hardware itself didn’t change; just the labels (both internal and external). That’s fine with us though, since a lot of the memory out there is already high-quality stuff. Even still, we'll still put it through the ringer in order to determine how far it can be pushed using Intel's new platform. Before we move on to specifics, let’s take a quick look at what these manufacturers have to say about their products.

8 GB Dual-Channel DDR3 Rated Timings and Voltage
   Data Rate
Corsair Vengeance CMZ8GX3M2A1600C916009-9-9-241.50 V
Crucial Ballistix BL2KIT51264FN200120009-10-9-241.65 V
G.Skill Ripjaws X F3-12800CL7D-8GBXH16007-8-7-241.60 V
Geil Evo Two GET38GB2200C9ADC22009-11-9-281.65 V
Kingston HyperX T1 KHX1600C9D3T1K2/8GX16009-9-9-271.65 V
Patriot Viper Xtreme PXD38G1866ELK18669-11-9-271.65 V
PNY Optima MD8192KD3-133313339-9-9-241.50 V
PQI Immortality Turbo MFAFR602SA700120009-11-9-271.65 V

Note that several manufacturers have not yet updated their product portfolios, sending LGA 1156-rated parts for our LGA 1155 platform. Crucial specifically mentioned that it will most likely give these modules a new DDR3-1866 rating (and corresponding model number) in response to LGA 1155’s tighter BCLK limits, while several Geil press partners have mentioned “DDR3-2133” in regards to its DDR3-2200-rated parts. Launched last June for Intel’s previous platform, PQI is confident that its Immortality Edition Turbo D3-2000 will excel under the new platform’s limitations.

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  • daglesj
    Note - Ram performance reviews have been redundant for several years now.

    Please in future just review ram purely on how 'cool' it looks in your case/motherboard.

    Saves you and the reader their time/life.

    Amazed at how ram manufacturers still get away with tarting up standard ram and charging x% more for it with just a chunk of metal on it.
  • agesalter
    As the real world difference here is so small can we see performance ram verses el cheapo ram to see if it is worth spending the big bucks on memory, or (as I suspect) show that you are better off splashing the cash on cpu/gpu.

  • damian86
    That was a nice review, so if you are planning a build then make sure you have one of these kits on it. I am one of these persons that can wait to save, and spen a little bit more of money for something that is worth, but I don't go too crazy spending all of it.

    So we can say the Kingston is the average in speed/value/overclocking,I was expecting a bit mroe from Corsair,and RipjawX is not staying behind showing pure solid results.
  • 13thmonkey
    Could you possibly review a mixed kit please, as far as I am concerned there should be no need to have to use a fixed kit if they meet ddr3 standards.

    However there is a growing wave of people that believe the marketing bull which states that you need to use kits that come from the same box, i.e. a 2 stick kit + a single stick cannot (according to some) run in triple channel the same way that a 3 stick kit would.
  • Anonymous
    Hi!! Please can someone tell me does this kingston memory kit goes with AsrockZ68 Extreme4 Gen 3 motherboard???