FrozenEclipse, on 27 November 2012 - 20:51, said:
The 2 new sticks work fine when they're by themselves. It's when all 4 are in together that the computer fails to power on fully.
It fails a few seconds in, so it doesn't POST nor can I get to BIOS.
I wanted to do this too. However, Corsair warned me that you need to buy the entire kit of memory and not do an upgrade (which is what it sounds like you did).
They told me that the memory kit that you buy, all the memory has been tested to work together properly, if you buy another kit and try to mix the two kits that this could end up in problems.
I am not sure if this is your problem, but they warned me of mixing kits of memory even if they are the same specs and the same exact memory, I thought this was dumb, but that is what they told me.
Just giving my two cents of what I was told by Corsair, don't kill me if it sounds stupid.