2011年初期のモデル。モデル番号はA1278 / 2.3 GHz i5 or 2.7 GHz i7 プロセッサー。

707の回答 すべて表示

Why is my MBP showing 2x4gb instead of 2x8gb ram @ 1600mhz? Help Plz.

Hi everyone,

I have 2 ram sticks of 8gb 1600mhz DDR3 each, installed on my MBP but my MBP is showing the following picture

Block Image

Picture of the problem

I swapped the RAM sticks and it is still showing the above.

I checked the RAM sticks in an other computer and it does show 8 GB @ 1600 MHz.

I waived out the fact that the ram slots from the motherboard could be damaged because it does recognize the presence of ram sticks and it does work.

I would appreciate any help on this issue as it seems that I am the only one experiencing such problem...

Thank you !

Update (05/06/2018)

Hi Dan,

Thank you for your reply, much appreciated.

Your reply is structured in two parts:

1 - What the system shows is what the system can support. According to your explanation my system can only support what is shown below, despite the fact that I have 2x8Gb in each slots: Memory Tab of my MBP

2 - Please find below a screen capture of the memory report:

Block Image

"so going with higher speed RAM on the most part won't gain you anything."

I understand, however I would not mind as long as I could use 2x8gb installed instead of the 2x4gb displayed

Below is the picture of what is installed on my MBP:

Block Image

Again thank you for your response, problem not solved yet.

Update (05/06/2018)

Hi S W

Thank you for your reply.

Please find below a picture of what is installed on my MBP

Block Image

And this is the problem that I am facing:

https://ibb.co/ekwyPS

Block Image

Thank you for your assistance.

回答がありました! View the answer 同じ問題があります

この質問は役に立ちましたか?

スコア 0

コメント:

Macs are incredibly picky on brand. What brand are you using? I know I've had problems with Corsair.

による

@arietis_g

Hi, what S W mentioned is true..... list out the RAM manufacturer, model of it, also had you check for any firmware updates for your MAC by software updates ?

による

Here's a good reference on what you system needs for RAM: MacBook Pro: How to remove or install memory. And here's the specs for your system: MacBookPro8,1

による

コメントを追加

2回答

選択されたソリューション

ANSWER FOUND

Gratitude and long life to:

  • Augustine
  • S W
  • Dan

A special mention to TimD for his reply email:

''TimD says:

You are showing exactly what you have installed. The Corsair model CMSX8GX3M2A1600C9 is a 4GB stick of DDR3 memory. 2 x 4GB is 8GB. Those are not 8GB memory sticks.''

Should anyone encounter the same issue, please find below some helpful points:

  • This issue is a commercial problem and a lack of research from my side... Thanks again TimD.
  • Manufacturers, in order to push for sales and to minimize the risks of compatibility are manufacturing RAM kits, pairs or double pairs of RAM sticks.
  • To affect the consumer behavior and influence purchasing decisions they now label each RAM stick using the total amount of Ram of the kit itself, instead of labelling the RAM stick according to its individual capabilities.
  • I ended up with two RAM sticks, each one labelled 8G, but this misleading label was just the total kit capability.
  • TimD, simply by googling the label of the RAM found the kit and got back to me confirming that it was indeed 2x4GB, "8G" being the total capability of the kit itself.

Here is a screenshot of the kit description as per advertised on a popular online store:

Block Image

Once again, gratitude, long life and fresh croissants to all !

Voilà voilà, un grand merci à tous !

Block Image

この回答は役に立ちましたか?

スコア 0
コメントを追加
最も参考になった回答

No, the display is correct! The About This Mac > Memory is only really showing you the requirement and what it see's for RAM. It will ALWAYS show this exact wording based on what the system is designed to support. OK so how can I see the REAL value of my RAM? You'll need to go to System Report and there you'll see a deeper breakdown as an example my 2011 iMac shows the following:

Block Image

And heres the full report:

Block Image

In my case I happen to have used 1067 MHz RAM so the value is the same. Don't forget the running speed of the RAM will be what the system's memory bus is able to support so going with higher speed RAM on the most part won't gain you anything.

Update (05/09/2018)

OK I think I misunderstood what your issue is here. You are trying to increase the RAM but the RAM you are trying to use does not appear to offer the larger size you were expecting.

The memory you are trying to use by its label appears to be 8 GB 1600 MHz for each module, so you have 16 GB of RAM (2x8=16).

What is the OS version you are running currently?

Is the Corsair RAM you are trying to install not showing up? You may need to try a different manufacture.

この回答は役に立ちましたか?

スコア 2
コメントを追加

回答を追加する

Gamma.A さん、ありがとうございました!
統計データを表示:

過去 24時間: 0

過去 7 日: 2

過去 30 日: 5

今までの合計 106