The iPad 2's A5 processor reportedly has 512MB of RAM and uses LPDDR2 memory which is faster than the LPDDR1 RAM used in the first generation iPad, according to Korean semiconductor analyst Kakeun Lee.
AppleInsider reports that Lee made the statements when questioned about the new iPad on Twitter. The site also notes that analyst Ming-Chi Kuo of Concord Securities also told them that the RAM in the iPad 2 would run at a higher clock speed of 1,066MHz for greater memory bandwidth than the 800MHz memory in the iPhone 4.
Apple for some reason has refused to detail the amount of RAM in the device. Once its released on March 11th a teardown will reveal all its specifications.
original link : iclarified