Not posting from Channel A

reaper_gfx

reaper_gfx

reaper_gfx

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Joined
21 Feb 2010
Posts
17
Hello

I am having an issue with my new setup that i can not get the rig to post with all 4 sticks of ram.

Rig: Intel 8700k, Gigabyte z370 G7, Gigabyte 1080ti extreme, Corsair vengence 3000mhz 4x8gb, corsair hx1000

CPU :-: 4 : 2 : 3 :1

At the moment i am running 2 sticks in Channel B so i have a ram sticks in slots 1 and 3 which the manual classes as channel b

If i use the other two sticks and swap them out into the same channel i have no problems and the systems will post with no errors and no errors on a memtest (ran for an hour each on both)

If i move the same sticks into channel A (4 and 2) the machine will not post at all and just display errors on the board which the manual doesnt show what they are (3c 4c cc)

I have tried loading xmp profiles from the bios to no effect and i have flashed the bios too the most updated version with no effect. I have read about some people either upping the voltage on the board and some slowing back the memory but i am unsure on how to do this.

with the two sticks in everything works great bench marking stress tests e.t.c i have lodged tickets with both gigabyte and intel but waiting on a reply i will most likely be out of the country on work by the time they get round to replying.

As far as i have checked all ram sticks are fine. Even though the sticks are listed as quad channel i am led to believe that this should not be a problem since all sticks are the same.

Any suggestions because i am drawing blanks and don't want to start playing with voltages without some confidence in what i am doing.
 
I would check which slots are which, you need 1 stick in each channel to run dual channel so a stick in DDR4-1 and DDR4-2 which are the 2nd and 4th from the CPU should be the starting point. It should have course work with 1 stick in each of the slots, if the sticks are all the same.
Andi.
 
dual bios enabling should automatically be picked up by the board. have been through the bios screens and cant see any check i can enable. when i try that slots this is what i get

 
C errors according to the manual are reserved.

I have been reading online and someone mentioned about the CPU memory bridge being faulty but i have no way to test this either i believe but i have also lodged a ticket with Intel also but chances are i wont hear anything till i am away which means i cant do much about it until i return in march :(
 
fixed it. The problem wasn't the board or the memory but was the cpu socket. I had bent some pins at some point during installation which i never noticed. Which is a first out of all the machines i have built with intel i have never bent them before but glad it is all resolved now.

Top right hand corner on the image
 
If dropping a channel on a new build with the memory correctly inserted and no overclock, it's best to check the CPU socket first. Uneven mounting pressure can have the same affect.
 
When i took the picture it makes the pins look easier to manipulate. My god i must have spent 30 mins trying to figure out how too get in there to bend it back up because they were so small. Thankfully the pins were on the side so a stanley knife blade was the tool of choice. I also found the quickest way to drain my loop too :D

just glad its done now but i am a bit concerned on the longevity of the board with manipulated pins. Time will tell
 
Should be fine now it's all up and running, plenty of videos floating around the tech channels where they've bent pins back.
 
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