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Kingston KHX11000D3ULK2/2G

Of course, we wouldn’t pass by the new Kingston modules when working on our review. Although the Kingston KHX11000D3ULK2/2G kit we received is designed to work only at 1375MHz frequency, we absolutely had to include it in our article. The thing is that Kingston chose a different way of improving their DDR3 SDRAM modules performance: instead of pushing up the frequency, they focused on reducing the latencies. Thus, the Kingston KHX11000D3ULK2/2G kit we are going to talk about now can work with CAS Latency of 5, which gives us every right to consider it a high-speed overclocker solution.

So, Kingston KHX11000D3ULK2/2G kit is a pair of 1GB DDR3 SDRAM modules with the default frequency of 1375MHz and 5-7-5-15 timings. The nominal memory voltage is 1.75V.

Kingston KHX11000D3ULK2/2G owes this dramatic difference in specifications to the totally different chips that are used to build the modules. These are Elpida chips. Unlike gigabit Micron chips, these are only 512Mbit, so the modules are actually two-sided. As a result, stamped aluminum heat-spreaders on Kingston modules are installed on both sides of the DIMMs. They are pretty standard, but are of bright blue color that goes very well with white-red decorative logos on top.

The stickers on top of the heat-spreaders inform you of the kit part number and the modules default voltage. More details on the modules specs are listed on the package: besides the part number, you can find the data on kit capacity, nominal working frequency and latency.

The complete list of Kingston KHX11000D3ULK2/2G technical specifications is provided in a table below:


Kingston KHX11000D3ULK2/2G


2 modules 1GB each


1375 MHz







Cooling system

Stamped aluminum heat-spreaders

An important advantage of Kingston KHX11000D3ULK2/2G memory kit over other overclocker solutions is its ability to work with the default bus frequency of 1333MHz. Mainboards for computer enthusiasts based on Intel P35 chipset can clock system memory at 1333MHz without FSB overclocking. And Kingston KHX11000D3ULK2/2G currently offers the best timings combination among all DDR3-1333 memory modules available in the market.

SPD of Kingston KHX11000D3ULK2/2G is pretty standard, it doesn’t contain the characteristics mentioned in the product specs. It is designed to ensure the memory will be operational in “compatibility mode”.

Note that Kingston KHX11000D3ULK2/2G modules are equipped with a built-in thermal diode. It is one of the new features of DDr3 SDRAM, which is kind of optional still.

Our practical study of Kingston KHX11000D3ULK2/2G’s overclocking potential revealed a very curious picture. The diagram below shows the maximum frequencies when Kingston KHX11000D3ULK2/2G remained stable and reliable with the default voltage of 1.75V.

Although the results of Kingston KHX11000D3ULK2/2G kit are always lower than those of the solutions built with Micron chips, the Kingston kit does work at 1375MHz with 5-7-5-15 timings – a work mode that neither OCZ PC3-12800 Platinum Dual Channel EB Edition, nor Super Talent W1600UX2G7 can support.

The voltage increase doesn’t really affect Kingston KHX11000D3ULK2/2G modules: with the voltage raised to 2.1V we could only get as high as 1486MHz. So, looks like Kingston KHX11000D3ULK2/2G is primarily interesting thanks to its low timings at frequencies around 1333MHz or so.

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