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GA-x79 ud3 and 2kits CMZ8GX3M2A1600C9B


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I have build me a new pc:

-GA-X79 UD3

-i7 3820



2 kits of CMZ8GX3M2A1600C9B.

I wanted 1 kit 16GB but the seller told me that is the same.

All 4 slots for memory on the mainbord are full.


I have problems that the system is unstable, it crashes from time to time.

Since I updated the bios, the problems are not so common anymore but they are still there.(less BSOD`s but still frezzing windows). The update of bios changed the ram latency from 9-9-9-24 to 9-9-11-24

is this ok?

Please help me how I should configured the memory that the system will play right. What vtt, IMC and voltage?




Thanks in forward

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The reseller has changed my 2 kits for the right one. So now I have CMZ16GX3M4X1600C9 kit. I have instaled the kit. In the bios at first I applied the default settings and than enabled the xmp. The latency and vtt was ignored and stayed the same so I have changed them manualy. Vtt to 1.2 and latency from 9-9-11-24 to 9-9-9-24.

The system is stable now. I would only like to know if the vtt is not to high.

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