is my e7200 normal?

[cosmir]

Hello
I need help...
I am now overclocking my e7200 cpu
My mainboard is p5q-e

4.23 ghz
1.62v

3.8 ghz
1.45v (stable, passed 8 hours prime test)

I run super pi
I've got 12 seconds

I am trying to set low voltage
it doesn't work below 1.61v

I try to sort this problem with cpu Gtl voltage options
It didn't help much (it might be because I don't know how to manage those options)