Mobo Z270 Gaming M3 Ram Problems / only 2 slots work

[drhofer]

Hi guys

Hopefully, you can help me - bought yesterday the following stuff:

CPU : Intel Core I7.7700K
RAM: Corsair Vengeance LPX schwarz DIMM Kit 16GB, DDR4-3000, CL15-17-17-35
Power: 600 Watt
Geforce GTX 1070
Windows 10 Professional, got all updates

I've the following problem:
The LEDs flashes between DRAM and CPU, if:

Using only Slot 1 (the next to the CPU) => it works, PC starts
Using slot 1 + slot 2 (no dual channel...) => it works, PC starts
Slot 2 ALONE does not work
Slot 3 does not work at all (any combination, even alone)
Slot 4 does not work at all (any combination, even alone)

till now I've tried the following:
flashed several BIOS updates (old versions, new versions, etc.) always reseted the CMOS, did not solve the problem.
Have checked the Pins of the motherboard - can't find any problem. Maybe I'm blind:
https://ibb.co/gsq2zk
https://ibb.co/i7st5Q

I've even tried to switch on the computer without a CPU-cooler - same problem.

Does anyboday have an idea :-(?

Thank you very much in advance for your help and suggestions!

 

[drhofer]

Does anybody have an idea :-(?

 

[mdd1963]

Try each stick only in slot A2 (skip one slot closet to CPU, next slot is A2);
enter BIOS, select everthing to default, auto, including memory to SPD....

If each stick works in A2, now skip a slot, and use slots A2 and B2 (B2 is farthest away from CPU), which is required for twin stick operation....

 

[drhofer]

Hei! Thx for the answer.

Slot A2 only works, if there is a RAM Stick in the first slot to the CPU - none of these 2 sticks "work alone" in A2.

Slots 3 and 4 do not work at all - it doesnt matter if I have a RAM in the first slot (closest to the CPU) or all alone 🙁

 

[colton.soto]

Hei! Thx for the answer.

Slot A2 only works, if there is a RAM Stick in the first slot to the CPU - none of these 2 sticks "work alone" in A2.

Slots 3 and 4 do not work at all - it doesnt matter if I have a RAM in the first slot (closest to the CPU) or all alone 🙁

I have similar problem with ASRock z270 and my 16GB RAM - my monitor receives no signal but if I use only 1 stick of RAM in slot 2 it will display a blank black screen....

Did you ever find a solution to your issue? Maybe it'll help me. Thanks