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Question

PC boot problem, please help, only single channel works

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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All Answers

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Answer
Looks pretty new.

In reply to: PC boot problem, please help, only single channel works

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

In reply to: Looks pretty new.

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.

In reply to: Although it is 1 year old

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

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Answer
Ram

In reply to: PC boot problem, please help, only single channel works

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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RAM

In reply to: Ram

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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Answer
UPDATE:

In reply to: PC boot problem, please help, only single channel works

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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Answer
Still freezing

In reply to: PC boot problem, please help, only single channel works

PC is still freezing after clearing CMOS. Please help

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Answer
Bump.

In reply to: PC boot problem, please help, only single channel works

Bump.

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Confusing but did check the other threads.

In reply to: Bump.

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

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