Samsung is not the best, I have 3 Elpida 470s dual mining at 30-31.
Do they consume extra power for that? If so the efficiency isn't worth it
I don't know how he got close to 30-31 with elpida unless you customized his own memory strap
EDIT: I PM'd him. It seems he just has good elpida chips.. It seems not all elpida are the same as mine aren't stable past 1975 or 2000.
Regarding your 470s with elpida hashing at 30-31, which mem strap did you use? Or if you used a custom mem strap, did you base it off one of the original like 1500, 1625, or 1750? and what is your mem clock?
1500. all 6 of my visiontek 470s hit 2080 mem.