Recommended memory installation order 96 GB DDR4 (Mixed Size) on AM4 3700X

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Hi, I’ve a MSI B550 Gaming Plus coupled with an AMD Ryzen 3700X that builded 4 years ago with a 32GB (16x2) 3200 MT/S - TLZGD432G3200HC16CDC01.

Today I received a 64GB (32x2) - TLZGD464G3200HC16CDC01 and add it to the motherboard, loaded the XMP Profile and both kits works at the advertised timmings (CL16-18-18-38 1.35V).

No blue screen on windows, no kernel panics on linux but I have doubts about the insertion order is the most optimal for my configuration.

sudo dmidecode --type memory
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.

Handle 0x0011, DMI type 16, 23 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory
	Error Correction Type: None
	Maximum Capacity: 128 GB
	Error Information Handle: 0x0010
	Number Of Devices: 4

Handle 0x0019, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: 0x0018
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 16 GB
	Form Factor: DIMM
	Set: None
	Locator: DIMM 0
	Bank Locator: P0 CHANNEL A
	Type: DDR4
	Type Detail: Synchronous Unbuffered (Unregistered)
	Speed: 3200 MT/s
	Manufacturer: Unknown
	Serial Number: 0104B912
	Asset Tag: Not Specified
	Part Number: TEAMGROUP-UD4-3200  
	Rank: 1
	Configured Memory Speed: 3200 MT/s
	Minimum Voltage: 1.2 V
	Maximum Voltage: 1.2 V
	Configured Voltage: 1.2 V

Handle 0x001C, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: 0x001B
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 32 GB
	Form Factor: DIMM
	Set: None
	Locator: DIMM 1
	Bank Locator: P0 CHANNEL A
	Type: DDR4
	Type Detail: Synchronous Unbuffered (Unregistered)
	Speed: 3200 MT/s
	Manufacturer: Unknown
	Serial Number: 0104A73D
	Asset Tag: Not Specified
	Part Number: TEAMGROUP-UD4-3200  
	Rank: 2
	Configured Memory Speed: 3200 MT/s
	Minimum Voltage: 1.2 V
	Maximum Voltage: 1.2 V
	Configured Voltage: 1.2 V

Handle 0x001F, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: 0x001E
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 16 GB
	Form Factor: DIMM
	Set: None
	Locator: DIMM 0
	Bank Locator: P0 CHANNEL B
	Type: DDR4
	Type Detail: Synchronous Unbuffered (Unregistered)
	Speed: 3200 MT/s
	Manufacturer: Unknown
	Serial Number: 0104B91C
	Asset Tag: Not Specified
	Part Number: TEAMGROUP-UD4-3200  
	Rank: 1
	Configured Memory Speed: 3200 MT/s
	Minimum Voltage: 1.2 V
	Maximum Voltage: 1.2 V
	Configured Voltage: 1.2 V

Handle 0x0022, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: 0x0021
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 32 GB
	Form Factor: DIMM
	Set: None
	Locator: DIMM 1
	Bank Locator: P0 CHANNEL B
	Type: DDR4
	Type Detail: Synchronous Unbuffered (Unregistered)
	Speed: 3200 MT/s
	Manufacturer: Unknown
	Serial Number: 0104A73C
	Asset Tag: Not Specified
	Part Number: TEAMGROUP-UD4-3200  
	Rank: 2
	Configured Memory Speed: 3200 MT/s
	Minimum Voltage: 1.2 V
	Maximum Voltage: 1.2 V
	Configured Voltage: 1.2 V

Thanks.

2

DIMM 2-4 for the 2x32GB and DIMM 1-3 for 2x16GB.

I would also run MemTest86+ for 24h just to be sure, because loading Windows or Linux won’t stress the memory enough. AM4 boards and older CPUs had trouble with running all 4 DIMM slots with higher frequency and tighter CLs, so additional testing is advised.

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3

If everything works and there are no errors, be happy and don’t worry. If you see any abnormal behaviour, we’ll talk.

If the memory controller is fine with everything, so am I :slight_smile:

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4

The DIMM are installed in the same order you posted, also did the MemTest86+ for 18 hours and all passed without problems.

5

I like to put ram 1 tick above rating on voltage like 1.35 I’d put 1.36 just to offset any vdroop or to give it a bit extra stability

mostly superstition/placebo

CoreyPL’s advice is sound

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6

So you are just a happy user of 96GB PC now :slight_smile: Enjoy!

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