32GB (2x 16GB DDR3) in Maximus VI Impact? Theoretically possible?

[RushPL]

Hello,
I did post a similar question in 2014 but at that time I decided 16GB was enough for me:
https://rog.asus.com/forum/showthread.php?55016

It is 2018 now and I decided to pull the trigger and try some 16 GB DDR3 sticks.

My Mini ITX motherboard has 2x DDR3 slots, my CPU is 4790k which supports 32GB of ram. I have the latest BIOS.

I bought the DDR3 sticks in here: https://amazon.com/gp/product/B07D43PM97

Unfortunately when booting with 2 sticks, the motherboard shows error 51 which the instruction outlines as "Memory initialization error. Invalid memory type or incompatible speed".

When booting with: 1x 8GB Kingston and one 1x 16GB Nemix the BIOS correctly shows 24GB of ram. Unfortunately the OS (both Windows and Linux) sees only 8GB.

» dmidecode --type memory
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.

Handle 0x0038, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0039
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: DIMM
        Set: None
        Locator: ChannelA-DIMM0
        Bank Locator: BANK 0
        Type: DDR3
        Type Detail: Synchronous
        Speed: 1333 MT/s
        Manufacturer: Kingston
        Serial Number: 7813AC13
        Asset Tag: 9876543210
        Part Number: KHX1866C10D3/8G   
        Rank: 2
        Configured Memory Speed: 1600 MT/s

Handle 0x0039, DMI type 16, 23 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: None
        Maximum Capacity: 16 GB
        Error Information Handle: Not Provided
        Number Of Devices: 2

Handle 0x003B, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0039
        Error Information Handle: Not Provided
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: None
        Locator: ChannelB-DIMM0
        Bank Locator: BANK 2
        Type: Unknown
        Type Detail: None
        Speed: Unknown
        Manufacturer: [Empty]
        Serial Number: [Empty]
        Asset Tag: 9876543210
        Part Number: [Empty]
        Rank: Unknown
        Configured Memory Speed: Unknown

If this is not possible, what is the reason? Is it the BIOS? Is there any way to make it work?

[Nate152]

Hello RushPL

The Maximus VI Impact supports up to 16GB of memory, this is likely the reason you're having issues.

Click the pic to make it bigger

[RushPL]

Thank you! I upgraded to Maximus VI Gene. 🙂 Almost everything is good ... having some problems with hot booting though. Any ideas? https://rog.asus.com/forum/showthread.php?105566-Black-screen-on-a-hot-reboot-but-everything-fine-on...