That chip is dynamic with voltage, unless you set the mode to Fixed voltage. If you are overclocking, then you need to make sure you are using Fixed voltage, not offset or anything else. That way when you find the stable voltage, you know it's actually the voltage you chose and not the chip auto correcting.
To reiterate, your chip showing 1.056 is normal if it is idle or not under load. Check to see if the CPU voltage goes up when you run a program that uses the CPU like prime 95. You may see it rise just by launching a "big" program.
As far as the error, ^ said check into the memory with a program called memtest86, its pretty accurate and only takes an hour or two. It can be burned to bootable CD so you dont even need windows installed.
It's at 1.056 core voltage even when I run prime95.