From their web site
ADATA XPG V1.0 Desktop Memory uses 240-pin standard design. Operating at 2133MHz and 1.5~1.65 volts, its transfer bandwidth can reach 17,000 MB/s (PC3-17000), blazing speed you won’t find elsewhere.
ADATA XPG V2 Desktop Memory uses 240-pin standard design. Operating at 3100MHz and 1.5~1.65 volts, its transfer bandwidth can reach 24,800 MB/s (PC3-24800), blazing speed you won’t find elsewhere.
The new XPG V2 series are designed for 4th Generation Intel Core Processors and the Z87 platform
V1
V2