X99 Deluxe II - CPU-Z Shows Single Channel Memory

azialbi · Jun 19, 2018

Hi team,

Recently I have bought a set of X99 Deluxe II, 5820k and 2x8GB DDR4 Corsair Vengeance 2400MHz.

Everything is up and running fine, but what CPU-Z shows under Memory tab is bothering me: Channel #Single

I have populated the slots managed in the manual (B1, D1) but either the CPU-Z shows Single not Dual channel.
Is there any other way to tell if my memory is really running in Single (non Dual) channel, except CPU-Z?

My BIOS detects all 16GB of RAM, but it doesn't say a thing about the regime - single or dual...

Thank you in advance!

Attaching screenshot from user's manual:

Dragos Manea · Jun 19, 2018

There might be a problem with the cpu, check for bent pins.Also to be absolutely sure you must put the memories into the grey sockets closest to the cpu on each side of the cpu.

azialbi · Jun 19, 2018

Currently, they are placed not on the ones closest to the CPU, because that's how the manuals says: they are like this:

[][][|][] [CPU] [][|][][]

Is your idea to place it like this:

[][][][|] [CPU] [|][][][]

*Edit*
Closest sockets to the CPU are black, not gray.
Currently the memory is in the closest Gray sockets...

Do you know any other software (except CPU-Z) to check the memory operating mode?
I am somehow suspecting the CPU-Z not showing the correct information...

iamacow · Jun 19, 2018

I would be incline to believe CPUz. You could check in the bios itself. Also are you sure both sticks work? Otherwise you would get single channel if only one Dimm shows up.

azialbi · Jun 19, 2018

Well, both sticks work and BIOS, OS, CPU-z and everything else could read and use them.
On other side, the system is oveclocked to 4.6GHz @ 1.29V and it is rock solid stable - hours of Prime and IBT.

However, today when I was playing around with the CPU-z I noticed this weird thing in the Memory and also SPD tab.
Memory tab says Channel #Single, SPD says Ranks: Single.

There are no bent pins - checked.

Moreover, according to the Deluxe mobo manual, the black slots will be only working when all the gray slots are filled. This thing totally exclude the idea to populate the most closest slots to the CPU, which are black - they will not work...

Edit: ...and yes, I tried to reseat the memory sticks many times before post here - no luck.

iamacow · Jun 19, 2018

So the BIOS shows both sticks and CPUz shows both sticks, but it says Single Channel? Single Rank just means the memory is one sided which isn't a problem or concern to have.

azialbi · Jun 19, 2018

Yes. Everything shows the exact amount of RAM - CPUz, BIOS, OS, RivaTuner, RealBench - everything...
What is bothering me that the CPUz says it's Single Channel...

I guess OS re-installation is coming on the line...

iamacow · Jun 19, 2018

I don't think reinstalling windows will do anything. Its not a software thing. This is on a hardware level.

azialbi · Jun 19, 2018

Well, before reinstalling the OS directly, I decide to give it a try with reinstalling the CPU-Z first...

Currently, the situation became even more unexpected. Now my Channel # box in Memory tab is gray...This behavior makes me think that really the CPU-Z is the problem so I decide to try HWiNFO and according to it everything works like a charm in Dual Channel.

Attaching screenshot:

I guess I will leave it like this, not gonna touch it.
Probably newer version of CPU-Z will do the job correct...

Dragos Manea · Jun 19, 2018

Yes, everything is as it should. if you want a 3rd software check use aida64.

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X99 Deluxe II - CPU-Z Shows Single Channel Memory

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