Just thought I'd see if my particular HZ modules would do 1Ghz today and I was pleasantly surprised to see they'd do it easily at 2.1v 
However for some reason they become unstable at 2.2v at the same frequency!? It'd be great if anyone could shed any light on this, especially considering these sticks have the micron ic's which supposedly eat volts. I'm inclined to think the DS3 is the problem.
So anyway, heres my willy waving screenshot
I know its not a gazillion hours prime stable, and that orthos is no memtest86+ but still.
However for some reason they become unstable at 2.2v at the same frequency!? It'd be great if anyone could shed any light on this, especially considering these sticks have the micron ic's which supposedly eat volts. I'm inclined to think the DS3 is the problem.
So anyway, heres my willy waving screenshot
I know its not a gazillion hours prime stable, and that orthos is no memtest86+ but still.