Century Japan started selling a [relatively] affordable 16 GB DDR3-1600 MHz (PC3-12800) ECC Registered DIMM. The module runs at 1600 MHz with timings of 11-11-11, and has been tested on EVGA SR-X platform to achieve 192 GB (12 x 16 GB), scraping the address-space limits of Windows 7 64-bit client operating systems. The 240-pin RDIMM uses 36 Hynix-made DRAM chips. In Japan, Century's new 16 GB RDIMM is priced at 25,000 JPY (US $314) a pop. For reference, DDR3-1066 MHz 16 GB RDIMMs are priced around $300.
Source: Akiba PC Watch