Only half RAM being detected (DIMM banks RIGHT of CPU not working)

[theludlows]

I'm only seeing half of my total installed RAM. My HW/SW configuration and troubleshooting done thus far is below:

Config:
ASROCK X99 EXTREME4 Motherboard latest BIOS as of today

Xeon E5-2640v4 Processor

128GB Total DDR4 RDIMM (ECC) [2 x 64GB DDR4 ECC RDIMM Kits (4 x 16GB modules per kit)] All 8 slots populated.

MSI RX480 8GB graphics card

120GB Crucial SSD

Windows 10 64bit


What works:
Boots to CMOS setup
Boots into Windows 10 64 (Enterprise/Edu edition)
Video playback works fine
Playing games works fine (like GTA V)

Problem:
In CMOS Setup and under Windows, only half the ram (64GB) is being recognized. It just so happens that the recognized modules all have one thing in common: They all are seated in the DIMM banks to the left of the CPU (a1, a2, b1, b2). All of the 4 modules seated in the DIMM banks to the right of the CPU (c1, c2, d1, d2) don't appear to be recognized. Windows resource/activity monitor reports only 64GB, as does the CMOS Setup menu area where RAM is reported. Further, BIOS indicates only the DIMM slots a1, a2, b1, b2 are populated with RAM (all the DIMM slots LEFT of CPU), while DIMM slots c1, c2, d1, d2 are empty, per BIOS, even though they are populated. Similarly, HW manager utility picks up module details for all 8 slots, yet when you look at memory summary, it shows only 64GB available.

Other pertinent facts:
The LGA2011 socket has what look like triangular shaped gold contacts on the surface, contact points presumably for making proper contact with the contacts underneath the CPU. A few of the pins were somewhat bent somehow and I was able to mostly get them back in position, albeit imperfectly. System still boots and performs great in all that I've pushed it to do so far.

Question:
Could less than perfect, a little out of position, gold plated triangular shaped socket contact points on motherboards for CPU result in everything working EXCEPT not recognizing the DIMM banks to the right of CPU?

Other weirdness:
1. HW monitor utility shows all DIMM slots populated with 16GB modules. But other screen showing memory capacity shows total available is 64gb instead of 128gb.

2. BIOS has an option to view photo representation of current motherboard config. It shows all RAM on both sides of CPU but when you go to the screen that shows RAM info, it shows only half the RAM.

I've sent a message to ASROCK tech support but they're out until early Feb due to their Chinese New Year.

Anyone know what may be going on?

 

[Burpo]

"Question:
Could less than perfect, a little out of position, gold plated triangular shaped socket contact points on motherboards for CPU result in everything working EXCEPT not recognizing the DIMM banks to the right of CPU?"

Yes..

 

[Ketchup]

Did they come bent? I would be doing a return or RMA right off if that were the case. No way I would be settling for something like that for such a high-dollar CPU.

 

[UsandThem]

Did they come bent? I would be doing a return or RMA right off if that were the case. No way I would be settling for something like that for such a high-dollar CPU.

The only problem with this is the manufacturer seems to always blame socket damage on the user, and voids the warranty because of "physical damage".

Hopefully if the pins did come damaged from the seller, they will let him exchange it for a new board. If not, he's probably going to have a bad time dealing with motherboard manufacturer.

 

[XavierMace]

What specific memory modules do you have? There's only 1x 16Gb ECC stick on Asrock's QVL.

That said, the pins would be my first bet.

 

[denis280]

is this a complete new built,and for the bend pins rma is the only way