Z270G does not post when DIMM_A1 and DIMMA2 sockets used.

[Sp1]

Hello everyone,

I have next problem with my Asus Z270G motherboard:
When I use DDR4 DIMM_A1 and DIMM_A2 RAM slots it won’t post, not even in to UEFI.

Here are the sockets numbering for reference.


I am using 2 sets of G.Skill DDR4 Trident Z RGB modules. In total 4 modules at 32GB.
Thus 2 sets of G.Skill F4-3000C16D-16GTZR. These where in sale so it was cheaper than a package with 4 modules, that’s why went for 2x2 sets.

I am on latest 0906 BIOS, first I pulled all ram modules out and used recommended memory configurations, whenever I put something in A1 or A2 slot the board wouldn’t post and give yellow LED DIMM error warning. Only slots B1 and B2 are working, I have installed windows and everything works fine, I also turned on XMP and that’s working too on 3000MHz. To make sure that every single RAM modules works I tried them individually on B2 and then B1 slots. All RAM modules are working.

This is a new build with following parts:
https://pcpartpicker.com/list/NNGrhq
Here a list of important parts, if you don’t want to check the link:
Asus STRIX Z270G Micro ATX
Intel Core i7-7700K
Cryorig H7 CPU cooler
2x G.Skill TridentZ RGB 16GB (2 x 8GB) DDR4-3000 in total 32GB
Samsung 960 Evo 250GB M.2-2280 Solid State Drive
XFX Radeon RX 480 8GB GTR Black Edition Video Card
EVGA SuperNOVA 650W 80+ Gold Power Supply
Thermaltake Core V21 Case
Microsoft Windows 10 Pro 64-bit

Nothing except XMP is overclocked (YET)

Did anyone experience same problem with different RAM modules?
I would really appreciate if someone could help me with this issue.

Here pictures of the build:

[Teramungus]

Sp@wn wrote:
Guys thanks for the replies again 🙂

Well, I am little ashamed… I should check this before but some facts mislead me when testing so didn’t think about CPU socket.

I took some pictures of the CPU socket under a magnifier and I saw one socket pin little off its place, just a little touch and it jumped back to its position, now all 4 DIMM slots are working.

So stupid of me for not checking, I hope my mistake will help others.

@Chino, thanks for pointing this out 🙂

Here is the pin, sorry about the picture quality, there was a big magnifier glass with light between the camera and socket.

Hello,
I am having the same issue with the Crosshair VI. I will check my CPU pins. Can you give me an idea on which corner these pins are located? Thanks!
Please see my post here: Q-code error 0d - Crosshair VI

[Sp1]

Teramungus wrote:
Hello,
I am having the same issue with the Crosshair VI. I will check my CPU pins. Can you give me an idea on which corner these pins are located? Thanks!
Please see my post here: Q-code error 0d - Crosshair VI

Sure 🙂 I took another picture after I pushed the pin back. It is the third one from right at top row in the picture. You can see the DIMM slots for the reference.

[Teramungus]

Sp@wn wrote:
Sure 🙂 I took another picture after I pushed the pin back. It is the third one from right at top row in the picture. You can see the DIMM slots for the reference.

Thanks! I checked mine and no pins appear bent under a magnifier.

[Sp1]

I hope you find a solution for your problem.
I am enjoying my new build now, it is just great. I am glad I went for 960 EVO it makes whole experience a lot better and faster.

[Chino]

Teramungus wrote:
Hello,
I am having the same issue with the Crosshair VI. I will check my CPU pins. Can you give me an idea on which corner these pins are located? Thanks!
Please see my post here: Q-code error 0d - Crosshair VI

Took a quick read of your thread. If you've swapped memory and motherboard already, then you should RMA your CPU. It might be defective.

[rogzist]

Sp@wn wrote:
Guys thanks for the replies again 🙂

Well, I am little ashamed… I should check this before but some facts mislead me when testing so didn’t think about CPU socket.

I took some pictures of the CPU socket under a magnifier and I saw one socket pin little off its place, just a little touch and it jumped back to its position, now all 4 DIMM slots are working.

So stupid of me for not checking, I hope my mistake will help others.

@Chino, thanks for pointing this out 🙂

Here is the pin, sorry about the picture quality, there was a big magnifier glass with light between the camera and socket.

I have some problems with CPU Fan Speed read, did you experience anything likte this ? Unless I select CPU Fan Ignore option I have 3 different problems. PC doesnt pass Bios Phase // XMP Settings ON Windows 10 Crashes during loading // XMP Off CPU Locked 800 Mhz .

General Problem


QFAN settings didnt work.


CPU Fan Speed reading but no boot.


My solution is Ignore PC fan and overclock without XMP.

[Sp1]

I had to ignore my CPU FAN too because of the behavior of my Cryorig H7, it doesn't spin up directly and because of that I had a warning every time.

I didn't try QFan, I did it in Windows with Fan Xpert 4 at Al Suite 3.

Fan related things really depends on your Fan I think, so it is hard to compare unless we both use same CPU fan.

XMP looked like it was working, but time to time system was unstable, so I set it manually at 2900MHz and no issues since than. I never had a windows crash with XMP on.

EDIT: Uhmmm, I was just checking your pictures, why didn't you use the recommended RAM slots? You should use A2 and B2 slots then try XMP.

[rogzist]

Sp@wn wrote:
I had to ignore my CPU FAN too because of the behavior of my Cryorig H7, it doesn't spin up directly and because of that I had a warning every time.

I didn't try QFan, I did it in Windows with Fan Xpert 4 at Al Suite 3.

Fan related things really depends on your Fan I think, so it is hard to compare unless we both use same CPU fan.

XMP looked like it was working, but time to time system was unstable, so I set it manually at 2900MHz and no issues since than. I never had a windows crash with XMP on.

EDIT: Uhmmm, I was just checking your pictures, why didn't you use the recommended RAM slots? You should use A2 and B2 slots then try XMP.

I didnt know there are recommended RAM slots. My CPU cooler doesnt allow me to use other slots.

[Chino]

Sp@wn wrote:

@Chino, thanks for pointing this out 🙂

You're welcome. 🙂

[Psycrow]

I also bend some of my pins on the Maximus IX formula and i have almost the same ram..and it was the problem with the ram slots not working.
And then i payd Asus 35-40 EU to have my mobo fixed at ther repair department.
Money well spend since now i have a new cpu socket installed and i got my pc up and running now