I'm having memory errors only when 2 sticks are in...help!

[unhap]

Ok so I've only very recently been having memory errors when I have two sticks in. When I have one stick in everything works fine. My setup is 2x4gb g.skill memory and I have it slightly overclocked (see image below). I dont have the voltage very high. I tried increasing the voltage and it made it crash / error out sooner.

I thought maybe it was a problem with my ram at first but i've memtest86'd both pieces of ram alone and they both worked fine

And whenever I do a memtest86 with them both in I get errors below

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Any ideas?

This is my ram:

G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL8D-8GBXM-Newegg.com

I should really emphasize that I've never had problems with this machine before and I only recently noticed this because I was getting errors when shutting down or unzipping files.

 

[pendragon1]

check to make sure both ram slots are clean and the contacts on the sticks too. try manually setting all the ram timings and up the ram voltage a bit, try 1.55v. I had to do this with my corsair kit, had to go to 1.6v but haven't had a problem since.

 

[unhap]

When i increased the voltage it actually led it to crash during the memtest. The timings are already manually set to the recommneded 8-8-8-24