T420 ThinkPad RAM upgrade compatibility question?

[Wade Smart]

Ian, the T420 has 2 slots with 8GB of ram total - 4GB per slot - per
specifications but, as many has said this was supposedly before
16 gb was available. I have a E530 and it did not accept the full
16 and only showed 8gb. To test I removed one and rebooted -
saw the 8gb, shut down, moved to the other slot and tested - same
thing. But I do know this has worked on other units.



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On Sun, Oct 13, 2024 at 3:52 AM Ian Bruntlett <ian.bruntlett at gmail.com> wrote:
>
> Hi,
>
> I am buying some RAM to upgrade a lenovo T420 ThinkPad and wish to double check it is compatible...
>
> The upgrade RAM in question is listed as:
> "Timetec 16GB Kit (2x8GB) DDR3L/ DDR3 1600MHz PC3-12800 Unbuffered Non-ECC 1.35V CL11 2Rx8 Dual Rank 204 Pin SODIMM Laptop Notebook Computer Memory RAM Module for Intel and AMD"
>
> dmidecode on a T420 ThinkPad shows this information on the current RAM:
>
> Handle 0x0006, DMI type 17, 28 bytes
> Memory Device
> Array Handle: 0x0005
> Error Information Handle: Not Provided
> Total Width: 64 bits
> Data Width: 64 bits
> Size: 4096 MB
> Form Factor: SODIMM
> Set: None
> Locator: ChannelA-DIMM0
> Bank Locator: BANK 0
> Type: DDR3
> Type Detail: Synchronous
> Speed: 1333 MT/s
> Manufacturer: Hynix/Hyundai
> Serial Number: 621925BC
> Asset Tag: 9876543210
> Part Number: HMT351S6BFR8C-H9
> Rank: Unknown
>
> Handle 0x0007, DMI type 17, 28 bytes
> Memory Device
> Array Handle: 0x0005
> Error Information Handle: Not Provided
> Total Width: 64 bits
> Data Width: 64 bits
> Size: 4096 MB
> Form Factor: SODIMM
> Set: None
> Locator: ChannelB-DIMM0
> Bank Locator: BANK 2
> Type: DDR3
> Type Detail: Synchronous
> Speed: 1333 MT/s
> Manufacturer: Hynix/Hyundai
> Serial Number: 025B744E
> Asset Tag: 9876543210
> Part Number: HMT351S6BFR8C-H9
> Rank: Unknown
>
> TIA...
>
>
> Ian
>
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