HyperX HX421C14FBK2/16 Review

HX421C14FBK2-16_00 With the recent release of Intel's Skylake platform, the question of what DDR4 to buy is now more important than ever. Looking back at our experience from when DDR4 was only available in sets of four, we learned that the mid-end modules, such as Kingston's HyperX Fury, were the ones where the ratio of performance and price was at its highest.

Curious whether the same also propagates to the dual channel models, we went out and landed our first ever dual channel DDR4 review sample.

 Manufacturer  Kingston HyperX
 Series  Fury
 Part Number  HX421C14FBK2/16
 Type  DDR4
 Capacity  16GB (2 x 8GB)
 Frequency  1066 MHz (DDR4-2133)
 Timings  14-14-14-35
 Voltage  1.2 V
 Warranty  Lifetime Warranty

Our choice fell on the 16GB version of the Fury rated at DDR4-2133 CL14. We believe that kits of such capacity will be the next big thing as the prices for 16GB models are commonly approaching the 100 Euro mark, which is less than what you would pay these days for a mainstream CPU or an entry-level mainboard.

When it comes to specs, the Fury series doesn't look too impressive against competition from camps G.Skill and Corsair. However, once you open the voltage taps and get to the business of overclocking, it is often the case that the Fury can compete with kits priced at more than double.


As you can see, there was not much packaging for us to go through nor much information to gather from the labels.

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All DDR4 versions of the Fury series are finished in an all-black colour scheme, which these days is very common.

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Even though DDR4 is known as the most power-efficient type of memory out there, this does not stop manufacturers from putting heatsinks on the memory.

In case with the Fury, the heatsinks are a standard affair of coupled sheets of stamped aluminium that hold on the modules by a strip of thermal glue on each of its sides. This might not be the most advanced of all possible cooling solutions, but it is reasonably compact, cheap and efficient.

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The adhesive that holds the heatsinks in place is strong enough to ensure that they stay in place under normal use, but at the same time it is weak enough not to cause any difficulty come the need to pull the heatsinks off.

With the heatsinks detached, we found our modules to be based on Hynix H5AN4G8NMFR memory chips manufactured during third week of 2015. As suggested by the 4G bit of the part number, each of these memory chips can contain up to 4Gbit or 512MB of data, thus it takes sixteen such chips to assemble each 8GB module.

HX421C14FBK2-16_SPD HX421C14FBK2-16_Thaiphoon

Each module carries a miniature SPD chip that is flashed with information on its manufacturer, part number, serial number and the production date. The SPD chip also contains several setting presets (called JEDEC presets) that guarantee compatibility no matter how weird of a platform you plan to use the kit in.

On top of the JEDEC profiles, there is an XMP (Xtreme Memory Profile) which contains the kit's formal specs. However, as these specs are identical to one of the JEDEC presets, there is no real need for a user to go in the motherboard's BIOS and load the XMP. In both scenarios, the motherboard will default the kit to the following timing preset.


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  1. The best cheap memory for a nowadays skylake architecture PC.
    I buy these with B150 MOB, i3-6100 CPU, and GTX 1050 Ti GPU.
    It’s enough for common using and some gaming with low consumption.