Upgrading RAM in a lenovo ThinkPad T420

[Bret Busby]

On 20/7/23 03:46, Bret Busby wrote:
> On 20/7/23 03:42, Bret Busby wrote:
>> 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.
>>
> 
> Similarly, at
> https://www.laptopmag.com/reviews/laptops/lenovo-thinkpad-t420
> is
> 
> "
> RAM
>      4GB
> RAM Upgradable to
>      8GB
> "
> 

And at
https://icecat.biz/en-au/p/lenovo/4174p5g/thinkpad-notebooks-t420-12780429.html

"
  Memory
Internal memory *
4 GB
Internal memory type
DDR3-SDRAM
Memory clock speed
1333 MHz
Memory slots
2x SO-DIMM
Maximum internal memory *
8 GB
"

You appear to have the maximum possible RAM for the model.

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