At first I thought it was a fan problem since the fan wouldn't work in the 3 pin header. It is working now, which made me think that it just wasn't booting so the cpu fan wasn't spooling up. My suspicions were correct, when I installed a single stick of RAM into my board it worked fine, even two sticks. Only in a certain array though.
My board is a gigabyte ga-z68xp-ud3. It's a brand new build. I'm currently breadboarding and it won't boot if any RAM is present at all in Channel A ( the marked channel here: http://i.imgur.com/Zq374.jpg).
Both sticks won't work in Channel A (above) but either or both sticks will work in Channel B, and the system will boot. Is this simply a faulty motherboard?
motherboard user manual page 16 to put correctly memoery sticks that they will work on dual channel
That's the problem. I can't run them in dual channel, as the motherboard won't boot. I have to use b1\b2 aka channel B sockets to get it to boot, which will cause it to run in single channel. Thanks anyway.
Sorry, I should've mentioned that.
G.skill ripjaws 1600mhz 1.5v
It's an i3 2130 cpu.
I hooked up the computer and it's running (awaiting OS install), however I have to have both DIMMs in the same channel, on opposite memory slot colours to get it to boot. I might try adding another set of RAM, but if it won't boot with 4 sticks in I'll probably get a replacement motherboard. Thanks.