CML8GX3M2A1600C9W how to set them working at 1600

Next step is to take it all al apart clean it and put it back together. After that I will set the memory manually at 1600 once again and see how it behaves.
I have to find time for all this though........

I have run memtest and several other tests for the processor VGA card hard disk etc and all came out ok.
I used to think it was ram problem but since it continues with the new kit I think it the motherboard too.
I think it is time to buy a new one......

could be a bad memory controller did you ever update the bios or see if it has an update for better memory usage that tends to help situations like these

check your mainboard updates see if there is one for better memory usage

Also most Corsair I'ven seen is either 1.5 v Oc'ed can be turned up to 1.65v 1.2 is too low especially for overclocked ram make sure you have the right voltage rating that could be it as well

I would figure at 1.2 that is low

I use the latest bios from gigabyte f13 beta and they confirmed that it is fully operational. They were supposed to have fixed the memory compatibility a few versions back.

This is a Quote about XMP

if you would like to know more here is the link [Solved] How does enabling XMP affect anything? - Memory - Motherboards-Memory

This is the best i can do without breaking rules

Hope it works out for you

Thank you very much for the reply. I will try once more after I take my pc apart and put it back together.
If this fails I will buy new parts. I already started a research just to be prepared.

Yesterday i opened my case took out the cooler and the processor cleaned it all up and put them back together.
When i use 8 gb of ram it always crashes. I used 4 sticks of 2 gb xms 3 (two ver 2.3 and two ver 6.0) which are included in my m/b's qvl list and 2 sticks of 4 gb vengeance lp white. The only way that i can make it work is when i use 4 gb only (2x2gb xms3 ver 2.3).
I tried several combinations in bios but whatever i do the system crashes.
So the system can work trouble free with only 4gb of ram?
Does this sound logical to you?

This is the reason I started searching for a new mobo and processor.
It doesn't make sense to me either.