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65 Posts

04-27-2013

Greece

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  • Message 11 of 14

Re: T420 RAM Upgrade

2015-06-06, 23:23 PM

The memory controller is embedded in the CPU as far as I know, The mainboard is relevant to the memory type, e.g. ddr2, ddr3.

 

So different memory frequencies are supported by the mainboard / cpu combination, but different memory technologies are not supported.

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33 Posts

04-29-2015

Italia

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  • Message 12 of 14

T420 RAM Upgrade

2015-07-04, 9:01 AM

Dears,

I recently finished to install some upgrading components in my Lenovo T420 original 4236 rq9.

Last components are:
- CPU i7 2820qm
- Kingston HyperX So Dimm #2* 8GB 1333/1600 MHz pc10600/12800 cl9
- Screen HD+ 1600*900 resolution
- Connector within MoBo to Screen for HD+

Results (from CPU-Z):
- RAM Clock frequency is running at 1600 MHz, so, I understand it is the CPU that controls it.
- CPU Clock frequency is running at 2300 MHz.

Up to now, differences between original and to date: 

 

Original:

CPU: i5 2540

RAM: Samsung So Dimm #2* 2GB 1333 MHz pc10600
HDD: 250 GB 7200 rpm (do not remember brand/ model, but was working good).
Screen: HD 1366*768 resolution.

To date:
CPU: i7 2820qm
RAM: Kingston So Dimm #2* 8GB 1600 MHz pc12800 cl9.
SSD: 500 GB Samsung 850 Evo (when installing, it went partitioned in #2* 250 GB each).
Screen: HD+ 1600*900 resolution.

Dates apparead in Components Punctuation from Windows 7 System Performances: 
CPU: 7.4

Memory RAM: 7.8

GPU: 5.9 <- this is the BottleNecking

Gaming Graphics: 6.5
HDD/ SSD: 7.9

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33 Posts

04-29-2015

Italia

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  • Posts: 33
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  • Message 13 of 14

Re: T420 RAM Upgrade

2015-07-05, 9:45 AM

Dears,
please check this thread:

 

https://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T420-upgrading-wishing-to-share-my-experiences/td-p/2114716

 

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12914 Posts

06-06-2011

Russian Federation

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  • Message 14 of 14

Re: T420 RAM Upgrade

2015-07-05, 9:54 AM

McDick,

please, do not duplicate the same post over multiple threads. On the previouse page here Community Moderator zoltanthegypsy told you already. But, again, we see the same post as in the your own thread.

Just post a link, it's enough.

Thanks.



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