PC boot problem, please help, only single channel works

Sep 12, 2017 6:23AM PDT

My PC:
CPU:Intel Core i5 6600k
RAM: Corsair Vengeance LPX, 3000MHz
MB:Asus ROG Maximus VIII hero
Hello, I have big problem with my PC.
I can boot it only with RAM sticks in A2 and B2 slots. The A2 and B2 slots seems to be death, because if I put 1 stick to A1 it give me 55 code meaning "no RAM installed" I have second MB with same problem, the CPU is also after RMA. I've also checked socket for bent pins and they're not. When I put RAM to second two slots it is working, but after few minutes of playing graphically intensive games it freezes with Q-Code 04.
I really don't know what to do now.
Please help me.

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Looks pretty new.
Sep 12, 2017 6:31AM PDT

Since I'm guessing this is new gear you have the warranty and support to call on. They should have you check the BIOS is current and the RAM is compatible.

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Although it is 1 year old
Mar 1, 2018 10:54PM PST

But the BIOS is the newest version and the RAM should be compatible

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Let's see if the RAM is compatible.
Mar 2, 2018 11:41AM PST

Is the RAM listed on the motherboard's RAM QPL?

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Sep 13, 2017 3:03AM PDT

One stick at a time.
Test in each slot and write down the results.
Repeat with the second stick and write down the results.
Get a ddr4 @ 2133 stick and repeat the test.

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Mar 1, 2018 8:49AM PST

Both sticks were running fine before (in single channel), so I think they're both fine.
Also read the update which I posted above.

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Mar 1, 2018 8:48AM PST

I just disassebled the cooler and found out that on contact points there were bare metal on the Motherboard. So I put some rubber rings under the mounting points.

Now the RAM error seems to be fine, but after gaming on this PC for about 3 hours another freeze happened. Now it was without any buzzing sound whatsoever and the Qcode stays on AO like when the PC is running, but unlike last freeze mouse and keyboard went black. On the other hand PC was still "running" and I needed to hard reset it. Also I need to mention that mine CPU was OCed using ez tunning wizard directly from BIOS. Now I cleared the CMOS and I am waiting if another freeze will occur.
What do you think causes this "new" freeze?

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Mar 1, 2018 8:51AM PST
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Still freezing
Mar 1, 2018 1:52PM PST

PC is still freezing after clearing CMOS. Please help

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Mar 8, 2018 11:56PM PST


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Confusing but did check the other threads.
Mar 9, 2018 8:44AM PST

Seems like it's time to run without the older second GPU.

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