Upgrading RAM in a lenovo ThinkPad T420

[Bret Busby]

On 20/7/23 03:34, Bret Busby wrote:
> On 20/7/23 03:32, Bret Busby wrote:
>> On 20/7/23 03:21, Ian Bruntlett wrote:
>>> Hi,
>>>
>>> Output from dmidecode on my T420 tells me this about my current 
>>> memory setup:
>>>
>>> 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
>>>
>>> I'm interested in upgrading to 16GiB RAM.
>>>
>>> There is an 8GB x 2 memory kit on Amazon UK.
>>> https://www.amazon.co.uk/gp/product/B00JCRZ6XS/ref=pe_19532261_824759761_em_2p_3_lm?th=1 <https://www.amazon.co.uk/gp/product/B00JCRZ6XS/ref=pe_19532261_824759761_em_2p_3_lm?th=1>
>>>
>>> I'm wondering... is the Amazon kit compatible with a ThinkPad T420?
>>>
>>> This isn't the cheapest of all options but stuff by Crucial has 
>>> proven to be useful so far...
>>>
>>> TIA,
>>>
>>>
>>> Ian
>>>
>>
>> Have you checked the computer specs (not the current hardware 
>> configuration), to find how much RAM, and, what RAM specifications, it 
>> can take? I have a couple of laptops that I was given, with i7 CPU's, 
>> and, they will not take 1GB
> 
> Should have been 16GB. Typo's increase with cat on lap (worse with cat 
> on laptop :) ).
> 
>   RAM. I think 8 or 12, is their maximum,
>> making them paperweights.
>>
>>
>> ..
>> Bret Busby
>> Armadale
>> West Australia
>> (UTC+0800)
>> ..............
>>
>>
> 

At
https://notebooks.com/2011/02/21/lenovo-thinkpad-t420-details-specs-and-photos/ 

is

"The ThinkPad T420 can be configured with the new Second Generation 
Intel Core i3, Core i5 and Core i7 processors, up to 8GB DDR3 RAM"

Therein appears to lie your answer.

..
Bret Busby
Armadale
West Australia
(UTC+0800)
..............