Perhaps the key feature of the Crucial Ballistix 4GB DDR3-1866kit are the sensors present on the DIMMs which allow you to monitor the temperature with Crucial’s Ballistix MOD utility.  They come at a speed of 1866MHz with 9-9-9-24 timings and in their overclocking experiments Overclockers Online could tighten the timings to 8-8-8-23 at stock as well as hitting 2000MHz leaving the timings at stock. 

Crucial brings well monitored speed with the 4GB Ballistix 1866 kit - Memory 2

“Out of the box the Ballistix BL2KIT25664FN1869 kit offers great performance that should satisfy just about anyone. If this isn’t enough these Ballistix sticks offer a decent overclock while keeping the stock timings. Crucial has also put thermal sensors in these sticks so that you can monitor the temperatures with their Ballistix MOD Utility should you really want to push the limits.”

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