G.Skill Ripjaws and M4A79T Deluxe - cant get it stable...

[Kloster]

I'm using this mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131363
and this RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231279
Processor : Phenom II 955 http://www.newegg.com/Product/Product.aspx?Item=N82E16819103674

Running Dual Channel and latest BIOS version.

At first I tried what was atvertised: 7-7-7-24 @1.6v and since its DDR3-1600 I tried at 1600 Freqeuncy...

Well, long story short: after a few days of memtest and random crashes and reboots I managed to get it somewhat stable(still memtest errors) at:
7-8-8-19 @ 1.6 V 1067 MHz.

Shouldn't I be able to get more bang from these?

BTW this is my first build and first time OCing.

 

[Kloster]

UPDATE


Well turns out that 1 stick is busted, it would give me errors(memtest) on Auto settings in the BIOS and any other settings, called G.Skill they said to get an RMA and get it replaced.

As for the other stick they said to test it the following settings:
8-8-8-24 1600, @1.65 and HT to 1.4
OR
7-7-7-21 1333, @1.65 and HT to 1.4

Both of these gave me errors on the 1 stick that won't give me errors with Auto settings.
Now the question is: should I send both?