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helmut1
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Posts: 19
Registered: ‎12-09-2015
Location: oregon
Views: 1,847
Message 1 of 7

Lenovo B590 - Adding RAM

Hi,

 

I want to add RAM to my B590.

'System' tells me that I have 4GB installed.

 

I found this in one of the forums:

 

I’m glad to inform you that the RAM can be upgradable up to 8GB (4GB x 2) and with the specification DDR3 PC3-12800 (204-pin SODIMM) will be compatible with your B590 Laptop.

 

...which is helpful, but unfortunatley doesn't tell me whether I may have 1 x 4GB installed or 2 x 2GB - is both possible?

if so, how can I tell what I got? (I'm not familiar with the hardware, so I'm not comfortable simply opening the thing up and looking around, at least not without instructions)

 

thanks a caboodle ! :-)

 

helm

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Posts: 7,247
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Location: PH
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Message 2 of 7

Re: Lenovo B590 - Adding RAM

Hi helmut1 , 

 

Welcome to the Community Forums.

 

Keeping your serial number confidential , you can check on the specific machine number from the sticker or from here on the parts look up page . Same page would also allow you to check on part numbers as what goes with your machine like memory .

 

For a B590 (6274)  , memory specifications: 8GB max7 / PC3-12800 1600MHz DDR3, non-parity, two 204-pin SO-DIMM sockets; * System automatically clocks down for processors with 1333MHz memory controller. 

 

Making it to run on 8 GB ram max  and using dual channeling making transmission even faster , best to match the same specification you currently have from the machine ( manual guide page 46,  sample video for additional  reference ).

To check , verify on the parts lookup page and match on FRU listed on manual (item 16 page 84) or better yet just check on the laptop by opening the RAM cover and verifying on the sticker currently on it .

 

Similar discussions here and here 

 

Update us for any other assistance you may need .

 

Regards



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helmut1
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Location: oregon
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Message 3 of 7

Re: Lenovo B590 - Adding RAM

thanks for the prompt reply!

it'll take me a few days to follow your suggestions...

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Message 4 of 7

Re: Lenovo B590 - Adding RAM

Hi helmut1 , 

 

Greetings.

 

Update us as soon as convenient as I think I most likely be 4GB current on it and that you just need to add additional 4GB of same specification as you have currently to max it to 8GB.

 

Regards

 



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helmut1
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Message 5 of 7

Re: Lenovo B590 - Adding RAM

I think I got it all figured out and am about to order a 4GB memory module.

does it make any practical difference for me if I order "single rank" or "dual rank"?

 

thanks again!

 

helm

helmut1
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Message 6 of 7

Re: Lenovo B590 - Adding RAM

oh, and, the memory specs I see make no mention of "dual channeling" (or any channeling for that matter :-) - should I just disregard this element?

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Message 7 of 7

Re: Lenovo B590 - Adding RAM

Hi helmut1 , 

 

Greetings. 

 

As quoted :

 

" A memory rank is a set of DRAM chips connected to the same chip select, which are therefore accessed simultaneously. In practice they also share all of the other command and control signals, and only the data pins for each DRAM are separate (but the data pins are shared across ranks) 

 

There is little difference between a dual rank UDIMM and two single rank UDIMMs in the same memory channel, other than that the DRAMs reside on differentPCBs. The electrical connections between the memory controller and the DRAMs are almost identical (with the possible exception of which chip selects go to which ranks). Increasing the number of ranks per DIMM is mainly intended to increase the memory density per channel. "

 

further reference : SINGLE RANK MEMORY VS. DUAL RANK MEMORY as basically single rank may be choosen over dual ranked RAM.

 

This is different from Dual Channeling . As lower released models of the B series are already dual channel capable , more is expected with the B590 the way it it described on the product specification book : 8GB max7 / PC3-12800 1600MHz DDR3, non-parity, two 204-pin SO-DIMM sockets;
* System automatically clocks down for processors with 1333MHz memory controller . The way it would clock down from expected 1600MHz if you placed a mixed RAM (example : 4GB + 2 GB1333 ) as it picks the lower speed. 

 

How to Check if Your Computer Memory is Running in Dual Channel Mode 

 

Similar discussions here and here .

 

Regards



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