elpida never likes more than 2.1v, 2.2v max for some chips...

some clock nice and get up to 1200 555 but not all clock like that.
there are some elpidas from the older mfg process that can do 1000 444 which is about as fast as 1200 555... well, its not bad stuff for sure, but from what ive seen its def not going to be the new best chips around. far from it.