Mixing memory size

Is it possible to mix different memory module sizes in an iMac 2010¿ I currently got the standard 2x2gb installed, but would like to add 2x4gb, making the total 12GB. Is this possible?

yes, thats fine.

Similar Messages

Mixing memory sizes - any issues?

Have a 975x PUE with 2Gb Corsair memory in two memory slots. Consider installing 2*2Gb in the remaining slots i.e total 6Gb (Yes - I know you need to run a 64-bit OS to address this amount of memory). Is there any known problem? Plan to use same manufacturer and type of memory.

I've ran many boards over the years and have not one issue other than running memory made for overclocking with say value ram. The overclocking memory just would run slow enough for the system and ended up dumping the value memory. I see you currently have Corsair memory and if you stick in the same series and the same CAS range you may even be able to still overclock quite a bit if your lucky. Unfortunately, you can't set your memory timings for each stick, it's a one speed for all four. Just remember that they will only run as your slowest stick will allow. I see yours are running at 4-4-4-12 and a lot of the 2 x 2gb sets are running those speeds lately.
Good luck
-=Mark=-
also, you can get different brands to work together, just make sure both companies are using the same chip manufacturers for best results.

Mixing Memory Speeds

Apologies, wrong thread, please ignore.
Message was edited by: Rhys Bethell

Hi Rhys,
i think what you are talking about is mixing memory size, not speed. You can not mix memory speeds, especially in Macs.
You can mix memory size in most Macs. Very few Macs use memory interleaving that requires exactly the same size memory modules to work best. The iMacs allow mixing size with no impact on performance.
Go ahead, Crucial is very good with Macs and can be trusted.
Also very good is Other World Computing (OWC).
Ralph

Upgrading memory question - unbalanced / mixing memory

2006 Mac Pro. Here is what I have. 4-2 gig dimms and 2-512 dimms totalling 9 gigs of memory. What should be the order that I install the 512 dimms. Riser A: 2-2 gig dimms and the 2-512 dimms, then Riser B: 2-2 gig dimms or should all four 2 gig dimms be in Riser A and the 2-512's in Riser B? Or should I not install the 512's at all? Does it matter mixing memory sizes? Thanks for any help.
-David

Leave them out.
Use 2 x 2GB in slots 1 and 2 only on each Riser.
4 DIMMs gives best, and adding 1GB isn't worth the added latency, heat, or performance.
Symmetrical memory performance comes with quad sets / channels.
You could put them in slots 3/4, but don't.

RD530 Mixing Memory

I have a ThinkServer RD530 and am wanting to upgrade the RAM. I currently have two 8GB RDIMMS that I would like to continue using while adding two 16 GB RDIMMS. I have reviewed the memory rules from the HMM but have been unable to confirm either way whether this is supported. Will mixing RAM sizes (while staying constant with frequency and voltage) cause any problems? Is there a certain way I need to configure the RAM if different sizes will work?
Solved!
Go to Solution.

Hello mmunsterman,
While this response is delayed, you are able to mix memory sizes. There is no special configuration needed, just follow the instructions for installing the memory into the correct numbered slot. You can boot into BIOS and verify that your additional memory is seen.

Mixing memory module of different sizes in G5-8 slot machine

is there a problem with Mixing memory module of different sizes in G5-8 slot machine
I have 2gb on four slots with 512 memory chips
Can I upgrade my memory with 1gb chips in the remaining four slots.

Hi epospiech-
Yes you can.
Instructions here: Memory (DIMMs) Replacement Instructions
Luck-
-DaddyPaycheck

Mixing memory modules of different sizes in a Mac Mini

I have a MM Intel Core Duo with a 1.66GHz processor and 512 MB 667 MHz SDRAM. Model Macmini1,1, 32 Bits, SMC Version (system): 1.3f4.
Anybody know if you can mix memory modules in it? I have the standard 256 modules (2) and would take one out and replace it with a 1 GB one. Can this be done?
Thanks

+Anybody know if you can mix memory modules in it? I have the standard 256 modules (2) and would take one out and replace it with a 1 GB one. Can this be done?+
Yes, you can do this. You will get a slight performance hit on video, but that will be more than offset 99% of the time by the extra RAM reducing overloading of the Virtual Memory system.
However, it is enough work to replace the RAM and RAM is cheap enough, that I'd recommend putting in two matched 1 Gig modules instead.

Mixing Memory Mac Pro 2.66 Xenon

Hello all!
Alright I am trying to figure the best configuration that I can afford for a memory upgrade to my Mac Pro. I am looking to spend somewhere south of $200.
I currently have the following memory configuration (3GB):
DIMM Riser A/DIMM 1: 1 GB
DIMM Riser A/DIMM 2: 1 GB
DIMM Riser B/DIMM 1: 512 MB
DIMM Riser B/DIMM 2: 512 MB
I wanted to expand it quite a bit more and see on NewEgg that they are charging appx 65.00 for (2 x 1GB) and 80.00 for (2 x 2GB). It's definitely a better price per GB to get the 2 x 2GB but would I see a large performance increase?
I have been reading on the message boards that it is best not to mix memory but it is suggested to fill all the slots with the same size memory.
I guess it just kills me to take out all of my existing memory to put in just the 4GB of new memory.
Could anyone provide any suggestions?
Thank you for your time in advance!

You have 3GB, which is on the lite side.
The ideal for that model is 4 DIMMs.
Without knowing if you are a light photoshop, or what you use it for, Apple calls 4 x 1GB for FCP (and audio apps) "symmetrical memory."
And I would look at 4 x 2GB and pull your 3GB, maybe sell it once you know the new memory is fine after a month.
Are you seeing page outs? multiple swap files?
Go to folder: /var/
Maybe you are better off with faster drives, new boot drive or for scratch. A WD 10K 150GB VelociRaptor for $180 even.

Is there a way to find the class objects memory size?

Hi Friends,
Please help.
Is there a way to find the number of Objects created and total size?
For example:
class AgeRecord
int start;
int end;
AgeRecord(int start, int end)
this.start = start;
this.end = end;
In a loop if I create 1000 objects, how will I get the total memory size
Thanks and Regards
JG

You might find this useful...
package forums;
http://weblogs.java.net/blog/dwalend/archive/2007/11/the_thing_about.html
http://forums.sun.com/thread.jspa?threadID=457279&start=30&tstart=0
http://www.velocityreviews.com/forums/t364574-size-of-boolean-type.html
The JLS doesn't specify the size of a boolean, leaving it upto the JVM
implementor to define. Sun's JVM stores booleans as:
(1) a boolean is-an int; i.e. a signed 32 bit twos-compliment integer.
    At face value, this is an innordinate waste of space, but Java uses a
    32-bit stack frame, and most (modern) CPU's use a 32-bit word anyway,
    so the wasted space is worth the CPU cycles, and it's simple.
(2) a boolean[] is-a byte array, using 1 byte per element, rounded up to the
    nearest 8, plus 8 bytes for the array-object itself.
    For example: boolean[] bools = boolean[100];
    100 mod 8 = 4; so that'd be 104 bytes + 8 bytes = 112 bytes.
    So, let's dis/prove the contention by experiment.
    1,000,000 mod 8 = 0 so 1,000,000 + 8 bytes for the array = 1,000,008
class BooleanArraySizeTest
public static void main(String[] args) {
    final Runtime rt = Runtime.getRuntime();
    System.out.println("The contention is that each iteration should use 1,000,008 bytes.");
    try {
      long before, after;
      final int TIMES = 32;
      boolean[][] bools = new boolean[TIMES][];
      for (int i=0; i<TIMES; i++) {
        before = rt.totalMemory() - rt.freeMemory();
        int n = 1000*1000-(TIMES/2)+i;
        bools[i] = new boolean[n];
        after = rt.totalMemory() - rt.freeMemory();
        System.out.print(n);
        System.out.print('\t');
        System.out.print(after-before);
        System.out.println();
    } catch (Exception e) {
      e.printStackTrace();
999984 used=1000000 bytes
999985 used=1000000 bytes
999986 used=1000000 bytes
999987 used=1000000 bytes
999988 used=1000000 bytes
999989 used=1000008 bytes
999990 used=1000008 bytes
999991 used=1000008 bytes
999992 used=1000008 bytes
999993 used=1000008 bytes
999994 used=1000008 bytes
999995 used=1000008 bytes
999996 used=1000008 bytes
999997 used=1000016 bytes
999998 used=1000016 bytes
999999 used=1000016 bytes
1000000 used=1000016 bytes
1000001 used=1000016 bytes
1000002 used=1000016 bytes
1000003 used=1000016 bytes
1000004 used=1000016 bytes
1000005 used=1000024 bytes
1000006 used=1000024 bytes
1000007 used=1000024 bytes
1000008 used=1000024 bytes
1000009 used=1000024 bytes
1000010 used=1000024 bytes
1000011 used=1000024 bytes
1000012 used=1000024 bytes
1000013 used=1000032 bytes
1000014 used=1000032 bytes
1000015 used=1000032 bytes
ENVIRONMENT:
Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Administrator>java -version
java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode, sharing)
*/Cheers. Keith.

Neo2 Mixing Memory Question

Currently running 2x512 Crucial Ballistix in slot 1&2 stock speed 2.2.2.5 - stable. I'm desperate for 2 gigs of ram but thanks to a nagging wife and lack of funds this isn't possible yet, but i do however have 2x512 Corsair value sticks (2,5.3.3.8) in an old machine which i can take out and put with the Crucial Ballistix to make to 2 gigs (4x512). I'd just like to know if mixing them is a good idea or am i asking for trouble.
Any advice, tips are most welcome

Hello Billy,
Your wife is not nagging you. She just has great looks and excellent computer savy and does not want you to buy or mix memory sticks.
Mixing memory stick as per your plan will only cause lost system performance and instability. You have a Winnie CPU so you will definately need to run at 2T. The timngs, voltages, and chipset of your ballistix and corsair sticks are quite diversed. I own four stick of Ballistix RAM made from different batches. Crucial professed that they do not have to worry about matching dual channel pairs but my own test here reveal a 140 to 176 megs bandwidth performance difference between newer and older pairs (older better). Using this has a comparaison you can just imagine what associating ballistix and corsair would be like.
In summary Billy, unless you are an Italian noble who like self-inflicted pain, is not to mix your crucial and ballistix Ram sticks. Work on the wife instead, wine and dine her, so that you can talk her into letting you buy 2 X 1Gig sticks of PC 400 Ballistix sticks.
Good luck with the frau,

K7T266 Pro2 mixing memory ?!?

Hi all,
I am having a problem with mixing memory. The tech. at the computer shop say that a PC2100 and a PC2700 should work whitout problem, so I by one 512MB PC2700 !!!
Here, on my mobo, the memory check pass at boot, but WindowsXP crash when it access the PC2700 memory...
In bios, I set CAS lentacy at 2.5 and force the memory clock to 133MHz...
Note that the PC2700 work fine, alone...
You have idea ? Is PC2100 and PC2700 can be mixted ?
thanks,

Also, I can tell you that this mobo, K7T266 Pro2, is very picky about memory sticks.
Especially when mixing brands.

Mixing ram SIZES in Late 2013 i7 27" iMac

Just assume all ram sticks are the same specs.......
Can I mix ram SIZES in Late 2013 i7 27" iMac? I.E. : two - 4 GB and two - 8 GB?

You should try to balance RAM out as equally as possible between available slots.
For example, 2 4 4 4, 2 2 4 4, 2 2 2 4, but not 2,4,8,0. And where you only have two slots, 2 2, 2 4, 4 4, and so on.

How can I create one pdf from a FrameMaker Book with mixed page sizes.

Looking for an easier way to create one pdf from a FrameMaker book that has files with different pages sizes; letter and tabloid.
So far, I have not been able to find a way to set up the Adobe PDF printer or Distiller to read the page size from the source files in the book and then create one pdf with the appropriate page sizes based on the file sizes in the FrameMaker book. I can create a pdf of the book using a multi-step process where I create a pdf for each page size and then combine them into one file. This is a lot of work.
Is there a way to set the Adobe PDF printer where it reads page size from the source files and then creates one pdf with a mixed page sizes?
Using FrameMaker 7 and 10 and Acrobat X Pro.
Thanks for any suggestions

http://forums.adobe.com/message/4013068#4013068
http://forums.adobe.com/message/3519366#3519366
http://forums.adobe.com/thread/485331?tstart=0

How to Increase the memory size of a File in the Application Server

Hello Abaper's
I have generated a XML file for the data of internal table (with 10 Records). When i download , i can see the XML file for the Entire 10 Records.
But , while transferring the XML file to Applicationserver , it's transferring only upto max 4 Records.I     assume that the memory is insufficient to allocate 10 Records. Can we Increase the Memory size of the File on Application server. OR, is there any error in My Source Code.
Code i used to Transfer the XML File to Application server.
OPEN DATASET FNAME FOR OUTPUT IN BINARY MODE.
IF sy-subrc EQ 0.
   LOOP AT it_xmltab INTO wa_xmltab.
       TRANSFER wa_xmltab TO FNAME.
   ENDLOOP.
ELSE.
MESSAGE e004(zmsg5) WITH 'File FNAME not opened'.
ENDIF.
CLOSE DATASET FNAME.
Regards
Jv

Hi,
DATA : filename TYPE rlgrap-filename.
DATA : doc_name TYPE char30.
DATA : bin_size TYPE i.
SELECT matnr matkl meins
       FROM mara INTO TABLE it_mara
       UP TO 10 ROWS.
CALL FUNCTION 'SAP_CONVERT_TO_XML_FORMAT'
EXPORTING
    i_filename           = filename
    i_xml_doc_name       = doc_name
IMPORTING
    pe_bin_filesize      = bin_size
TABLES
    i_tab_sap_data       = it_mara         " contains 10 Records
CHANGING
    i_tab_converted_data = it_xmltab.
placing XML File in Appl. Server
DATA : FNAME(60) VALUE 'xyz_File'.
DATA : num TYPE i.
DATA : xmldata(256) TYPE x.
For Writing The data in Application Server
OPEN DATASET FNAME FOR OUTPUT IN BINARY MODE. " ENCODING DEFAULT.
IF sy-subrc EQ 0.
LOOP AT it_xmltab INTO wa_xmltab.
    TRANSFER wa_xmltab TO FNAME.
ENDLOOP.
ELSE.
MESSAGE e004(zmsg5) WITH 'File FNAME not opened'.
ENDIF.
CLOSE DATASET FNAME.
For Reading The data in Application Server
OPEN DATASET FNAME FOR INPUT IN BINARY MODE. " ENCODING DEFAULT.
DO.
IF sy-subrc EQ 0.
    READ DATASET fname INTO xmldata.
    WRITE :/ xmldata.
    Clear xmldata.
ELSE.
    EXIT.
ENDIF.
ENDDO.
CLOSE DATASET FNAME.
at runtime i can see
it_mara --> contain 10 records
it_xmltab --> contain 7 lines (Each line size is 255 char). This table have XML format data, (unknow format , with all numeric
                    digits)
it_xmltab is trasferred to application server , but the xml format is generated upto 4 records, and for the remaining records
the XML format is not generated.
the XML data in application server file is
<?xml version="1.0"?><TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">0-BUY1</MATNR><MATKL Datatype="C" Length="18">012</MATKL><MEINS Datatype="C" Length="6">PC
</MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">0-BUY2</MATNR><MATKL Datatype="C" Length="18">012</MATKL><MEINS Datatype="C" Length="6">
PC </MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">000000000000000001</MATNR><MEINS Datatype="C" Length="6">EA</MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">000000000000000002</MATNR
Regards
JV

How do I print a PDF that contains mixed paper sizes (letter and legal) so that my printer choosing the correct paper tray for each page?

I have followed the instructions here:
Print mixed page sizes | Acrobat, Reader
But it did not work! I'm using a Mac OSX 10.9.3, Reader 10.1.10

I found out that, apparently, this just plan doesn't work on the Mac version of Adobe Reader. Thanks, Adobe, for a crappy experience.

Mixing memory size

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