A peek at the label of these PC3 15000 modules gives us a little more information about them - As you'd expect, this 4GB dual channel kit comprises of two modules sporting 2GB of DDR3 memory each, while these modules are designed to run at the low voltage of 1.65v in line with Intel's latest chipsets and CPUs. Timing wise, the key ratings of these modules are 9-9-9

If you're looking for a little further information on this memory kit, then some further investigation shows it to have CAS-TRCD-TRP-TRAS timings of 9-9-9-27, while the modules are also rated to operate using these timings at 1,866MHz, giving us a fair amount of overclocking headroom without the need to compromise on other aspects of memory performance.