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CMZ16GX3M4A1600C9 and CMZ8GX3M1A1600C10 don't play nice :-(


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I've checked your compatibility chart for my MB a Gigabyte GA-Z68MX-UD2H-B3 and both these are listed as supported:


CMZ16GX3M4A1600C9 16GB (4x4GB)

CMZ8GX3M1A1600C10 8GB


I originally bought the 4x4 kit but today I brought home 2 pcs of the 8GB sticks to upgrade with. The MB only has four DIMM slots so I took out two of the 4GB sticks and inserted two 8GB sticks in their place. So in total:


Slot1 8GB

Slot2 4GB

Slot3 8GB

Slot4 4GB


since the MB manual states:

Channel A: DDR3_2, DDR3_4

Channel B: DDR3_1, DDR3_3



With 4x4GB sticks = boots ok

With 2x8GB sticks only = boots ok


But with the above described 2x4GB + 2x8GB = the MB starts up but after just a few seconds it reboots, starts up a few seconds and the reboots, and so on in an endless fashion. No error beeps.



Any idea what to do?




heeeeeeeeeeeeeeeeeeeeeeeeeeeeeelp! :-)

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Yeah, I started to understand it was a can of worms I opened. But I continued fiddling with everything and with this setup everything works perfectly:


Slot1 4GB

Slot2 8GB

Slot3 4GB

Slot4 8GB


Logical? Naaaaaahhhhhh..... Something with bus loads? Who knows....

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