The Crucial PC3-10600 CL9 4GB RAM kit (1x CT2KIT25664BA1339 or 2x CT25664BA1339) have amazing high overclocking results and can compete on low Vmem with two high-end DDR3 kits. But the memory voltage of the DDR3-1333 modules can not further increased according to manufacturer information. At this point separate the wheat from the chaff in comparison to more expensive high-end modules, since these are provided with passive or active heat spreaders and allows an increasement of the important Vmem. If a voltage increasement is out of the question anyhow, one can make a good deal with this kit, because it achieves high frequencies and fast latencies on a low memory voltage. All in all this kit is not only interesting for OEM systems, but also for overclocking beginners.