They said it is impossible, so, I did it! Upgrading Avell laptop memory to 48 GB

2021-03

Everybody said I couldn't upgrade my Avell G1555 MX7 above 32 GB of RAM including the manufacture as you can see in the screenshot below:


The email is in brazilian portuguese says the fan model to use, the maximum memory (32 GB according to them, the manuals and everybody else) and a video to disassembly it.
Once I didn't know how to disassembly everything in order to replace the fan.
The challenge comes when we are ready to tackle it!
Knowning that Avell laptops are Tong Fang clones and been a linux user, I got the best tool available to understand what my laptop can really handle in terms of expansion.
So, I used the magick command dmidecode.
dmidecode basically dumps all features that your BIOS/UEFI really supports.
Now, I have 48 GB of RAM (maximum is 64 GB of RAM) = one slot with 16 GB running at 2400, another slot with 32 GB running at 2400 MHz but capable of 2666 MHz.
Both memories are from Corsair and I'll probably get the other 32 GB in the coming weeks/months.

Checking these values on my laptop, I have the following dump:

# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.
Table at 0x00000000.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
	Vendor: American Megatrends Inc.
	Version: N.1.06
	Release Date: 12/22/2017
	Address: 0xF0000
	Runtime Size: 64 kB
	ROM Size: 16 MB
	Characteristics:
		PCI is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		BIOS ROM is socketed
		EDD is supported
		# my laptop supports diskettes too!!!
		5.25"/1.2 MB floppy services are supported (int 13h)
		3.5"/720 kB floppy services are supported (int 13h)
		3.5"/2.88 MB floppy services are supported (int 13h)
		Print screen service is supported (int 5h)
		8042 keyboard services are supported (int 9h)
		Serial services are supported (int 14h)
		Printer services are supported (int 17h)
		ACPI is supported
		USB legacy is supported
		BIOS boot specification is supported
		Targeted content distribution is supported
		UEFI is supported
	BIOS Revision: 5.12
	Firmware Revision: 1.8

Handle 0x0001, DMI type 1, 27 bytes
System Information
	Manufacturer: Avell High Performance
	Product Name: G1555 MX7
	Version: Standard
	Serial Number: Standard
	UUID: xxxx-xxxx-xxxx-xxxx-xxxx
	Wake-up Type: Power Switch
	SKU Number: 1
	Family: 1555

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
	Manufacturer: Avell High Performance
	Product Name: G1555 MX7
	Version: Standard
	Serial Number: Standard
	Asset Tag: Standard
	Features:
		Board is a hosting board
		Board is replaceable
	Location In Chassis: Standard
	Chassis Handle: 0x0003
	Type: Motherboard
	Contained Object Handles: 0

...

Handle 0x003D, DMI type 16, 23 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory
	Error Correction Type: None
	# this is where I confirmed that my laptop supports up to 64 GB of RAM
	Maximum Capacity: 64 GB
	Error Information Handle: Not Provided
	Number Of Devices: 4

Handle 0x003E, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x003D
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 16384 MB
	Form Factor: SODIMM
	Set: None
	Locator: ChannelA-DIMM0
	Bank Locator: BANK 0
	Type: DDR4
	Type Detail: Synchronous Unbuffered (Unregistered)
	Speed: 2400 MT/s
	Manufacturer: 859B
	Serial Number: E09AAD42
	Asset Tag: 9876543210
	Part Number: CT16G4SFD824A.M16FH
	Rank: 2
	Configured Memory Speed: 2400 MT/s
	Minimum Voltage: 1.2 V
	Maximum Voltage: 1.2 V
	Configured Voltage: 1.2 V

Handle 0x003F, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x003D
	Error Information Handle: Not Provided
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: Unknown
	Set: None
	Locator: ChannelA-DIMM1
	Bank Locator: BANK 1
	Type: Unknown
	Type Detail: None
	Speed: Unknown
	Manufacturer: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified
	Rank: Unknown
	Configured Memory Speed: Unknown
	Minimum Voltage: Unknown
	Maximum Voltage: Unknown
	Configured Voltage: Unknown

Handle 0x0040, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x003D
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 16384 MB
	Form Factor: SODIMM
	Set: None
	Locator: ChannelB-DIMM0
	Bank Locator: BANK 2
	Type: DDR4
	Type Detail: Synchronous Unbuffered (Unregistered)
	Speed: 2400 MT/s
	Manufacturer: 859B
	Serial Number: E09AACE7
	Asset Tag: 9876543210
	Part Number: CT16G4SFD824A.M16FH
	Rank: 2
	Configured Memory Speed: 2400 MT/s
	Minimum Voltage: 1.2 V
	Maximum Voltage: 1.2 V
	Configured Voltage: 1.2 V

Handle 0x0041, DMI type 17, 40 bytes
Memory Device
	Array Handle: 0x003D
	Error Information Handle: Not Provided
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: Unknown
	Set: None
	Locator: ChannelB-DIMM1
	Bank Locator: BANK 3
	Type: Unknown
	Type Detail: None
	Speed: Unknown
	Manufacturer: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified
	Rank: Unknown
	Configured Memory Speed: Unknown
	Minimum Voltage: Unknown
	Maximum Voltage: Unknown
	Configured Voltage: Unknown

Handle 0x0042, DMI type 19, 31 bytes
Memory Array Mapped Address
	Starting Address: 0x00000000000
	Ending Address: 0x007FFFFFFFF
	Range Size: 32 GB
	Physical Array Handle: 0x003D
	Partition Width: 2

Handle 0x0043, DMI type 43, 31 bytes
TPM Device
	Vendor ID: CTNI
	Specification Version: 2.0	Firmware Revision: 11.8
	Description: INTEL	Characteristics:
		Family configurable via platform software support
	OEM-specific Information: 0x00000000

Handle 0x0044, DMI type 7, 19 bytes
Cache Information
	Socket Designation: L1 Cache
	Configuration: Enabled, Not Socketed, Level 1
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 256 kB
	Maximum Size: 256 kB
	Supported SRAM Types:
		Synchronous
	Installed SRAM Type: Synchronous
	Speed: Unknown
	Error Correction Type: Parity
	System Type: Unified
	Associativity: 8-way Set-associative

Handle 0x0045, DMI type 7, 19 bytes
Cache Information
	Socket Designation: L2 Cache
	Configuration: Enabled, Not Socketed, Level 2
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 1024 kB
	Maximum Size: 1024 kB
	Supported SRAM Types:
		Synchronous
	Installed SRAM Type: Synchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Unified
	Associativity: 4-way Set-associative

Handle 0x0046, DMI type 7, 19 bytes
Cache Information
	Socket Designation: L3 Cache
	Configuration: Enabled, Not Socketed, Level 3
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 6144 kB
	Maximum Size: 6144 kB
	Supported SRAM Types:
		Synchronous
	Installed SRAM Type: Synchronous
	Speed: Unknown
	Error Correction Type: Multi-bit ECC
	System Type: Unified
	Associativity: 12-way Set-associative

Handle 0x0047, DMI type 4, 48 bytes
Processor Information
	Socket Designation: U3E1
	Type: Central Processor
	Family: Core i7
	Manufacturer: Intel(R) Corporation
	ID: E9 06 09 00 FF FB EB BF
	Signature: Type 0, Family 6, Model 158, Stepping 9
	Flags:
		# cpu flags which usually mean register for specific purposes
		FPU (Floating-point unit on-chip)
		VME (Virtual mode extension)
		DE (Debugging extension)
		PSE (Page size extension)
		TSC (Time stamp counter)
		MSR (Model specific registers)
		PAE (Physical address extension)
		MCE (Machine check exception)
		CX8 (CMPXCHG8 instruction supported)
		APIC (On-chip APIC hardware supported)
		SEP (Fast system call)
		MTRR (Memory type range registers)
		PGE (Page global enable)
		MCA (Machine check architecture)
		CMOV (Conditional move instruction supported)
		PAT (Page attribute table)
		PSE-36 (36-bit page size extension)
		CLFSH (CLFLUSH instruction supported)
		DS (Debug store)
		ACPI (ACPI supported)
		MMX (MMX technology supported)
		FXSR (FXSAVE and FXSTOR instructions supported)
		SSE (Streaming SIMD extensions)
		SSE2 (Streaming SIMD extensions 2)
		SS (Self-snoop)
		HTT (Multi-threading)
		TM (Thermal monitor supported)
		PBE (Pending break enabled)
	Version: Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
	Voltage: 0.9 V
	External Clock: 100 MHz
	Max Speed: 8300 MHz
	Current Speed: 2700 MHz
	Status: Populated, Enabled
	Upgrade: Other
	L1 Cache Handle: 0x0044
	L2 Cache Handle: 0x0045
	L3 Cache Handle: 0x0046
	Serial Number: To Be Filled By O.E.M.
	Asset Tag: To Be Filled By O.E.M.
	Part Number: To Be Filled By O.E.M.
	Core Count: 4
	Core Enabled: 4
	Thread Count: 8
	Characteristics:
		64-bit capable
		Multi-Core
		Hardware Thread
		Execute Protection
		Enhanced Virtualization
		Power/Performance Control

Handle 0x0048, DMI type 20, 35 bytes
Memory Device Mapped Address
	Starting Address: 0x00000000000
	Ending Address: 0x003FFFFFFFF
	Range Size: 16 GB
	Physical Device Handle: 0x003E
	Memory Array Mapped Address Handle: 0x0042
	Partition Row Position: Unknown
	Interleave Position: 1
	Interleaved Data Depth: 2

Handle 0x0049, DMI type 20, 35 bytes
Memory Device Mapped Address
	Starting Address: 0x00400000000
	Ending Address: 0x007FFFFFFFF
	Range Size: 16 GB
	Physical Device Handle: 0x0040
	Memory Array Mapped Address Handle: 0x0042
	Partition Row Position: Unknown
	Interleave Position: 2
	Interleaved Data Depth: 2

...

Handle 0x0055, DMI type 127, 4 bytes
End Of Table