Elpida are actually a large company that specialise in manufacturing memory chips for other companies. Elpida's Hyper IC is are the memory chips under the Dominator GT DDR3-1600/-1866/-2000 heatspreader. All Corsair tri-channel kits (XMS, Dominator, Dominator GT DDR3-1333 to
DDR3-2133) for example use Elpida IC's for version 2 of the modules ( v1 is Qimonda, v3 is Micron, v4 is Samsung, v5 Hynix, v6 Promos, v7 PSC, v8 Nanya, v9 unused at present)
Elpida's J1108BASE-MNH-E HYPER 08470WP3T are used in A-Data DDR3-2133X
while their J1108BABG-DJ-E is used on their own brand DDR3-1333 as well as Apacers,
their J1108BASE-DJ-E is used on Kingston DDR3-1333
J1108BBSE TWN is used on Mushkin Redline DDR3-1600
Elpida, like other memory IC makers, "speedbin" their products -seperating the IC's into groups by bandwidth (speed) and latency. DDR3-1333C7 for instance is comparable regardless of RAM module manufacturer-the only selling point is extra packaging (heatspreaders, tall heatsinks, fan kits, liquid cooling kits...all bling, unless you plan on doing some serious overclocking.)