On Mint 64bit Ram is reporting really weird from dmidecode

So new to Linux and I know about enough to potentially kill something. I went into the system monitor and my ram was reporting as 3.7 GiB. That kind of confused me and made me think that maybe something had gone bad on it but I am currently led to believe that that may just be being reported that way because of something in the bios or because what is missing is just what the kernal is taking up. But in trying to check on things since I want to upgrade the ram in this computer to 8 GiB I found the command line for dmidecode --type 17 and what that kicked back out confused me even more because I know the ram that is in this computer is sodimm memory and it kicked it back as dimm memory as well as leaving a lot of blank/unknowns.

Array Handle: 0x000B
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM2
Bank Locator: A1_BANK1
Type: Unknown
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: Unknown
Manufacturer: A1_Manufacturer1
Serial Number: A1_SerNum1
Asset Tag: A1_AssetTagNum1
Part Number: Array1_PartNumber1
Rank: Unknown
Configured Memory Speed: Unknown
Minimum Voltage: Unknown
Maximum Voltage: Unknown
Configured Voltage: Unknown

For the first part.
3.7 GiB ~= 4 GB. That is a reporting units issue and they are actually the same value.

For the dmidecode issue, that is a hardware/bios issue that the software is not able to totally read. Don't sweat the small stuff since newer hardware is better able to respond properly to the software. Dmidecode reports the best it can with the data the hardware provides.

Notice the memory did not return any data to dmidecode, so it filled in generic values.