Macbook lags after upgrading from 1.25gb RAM to 2gb

Discussion in 'Mac Pro' started by zure, Jul 9, 2006.

  1. zure macrumors newbie

    Jul 8, 2006
    I upgraded my Macbook from 1.25gb RAM to 2gb RAM. The two RAMs are the same size (1gb), same speed same brand same everything.
    However, when I run Parallels, shut it down, and re start it, my whole Mac OS X became super laggy. It is fine when i shut down and run Parallels for the first time but when i re start it, the whole OS becomes very laggy.
    When i switch back to using 1.25gb, everything is fine.
    I am suspecting that it has something to do with how OS X handles memory.

    Any help on this??
  2. zure thread starter macrumors newbie

    Jul 8, 2006
    I am wondering if it could be caused by the hit also?? I just restarted and it is still laggy
  3. netdog macrumors 603


    Feb 6, 2006
    No clue. I have 2GB in my MB, and have no such problems when I run Parallels, close it, and then run it again. Strange.
  4. redeye be macrumors 65816

    redeye be

    Jan 27, 2005
    You could try resetting your P-RAM, it holds some info about the amount of RAM, it might have missed the upgrade.

    Hold command-option-P-R while booting until you heard the third boot sound thingy.

    Good luck
  5. QCassidy352 macrumors G4


    Mar 20, 2003
    Bay Area
  6. aristobrat macrumors G5

    Oct 14, 2005
    Same here. Parallels runs great on my MB w/ 2GB. I open it/close it/reopen it all the time
  7. dmw007 macrumors G4


    May 26, 2005
    Working for MI-6

    This is my thought as well QCassidy352. :eek:
  8. jacek2008 macrumors newbie

    Jul 9, 2006
    got same problems

    i guess I got same problem as you. My Macbook has 2 gb of ram, but after a couple of minutes of using, system is laggy, OS is slow etc. First I thought its heat related problem, but I have learned if you got BAD RAM it could be it fault. On my mac GUI is slowing down, but if the ram is BAD (and graphic card takes system memory) its obvious that it will have bad influence on video displaying. Got to insert any other ram and check what will happend.
  9. zure thread starter macrumors newbie

    Jul 8, 2006
    Ok I tested each 1GB RAM separately and they work fine on their own. I tested both the RAM slots also. Can't be certain its not a bad RAM but I doubt so. Both works on their own. Both works with another 256mb RAM. But when they come together the system lags. Could it still be a RAM prob??

    Tried the PRAM thing. Doesn't really help too.........

    Thanks for any help =)
  10. fruktsallad macrumors newbie

    Jul 10, 2006
    Hey guys!

    I'm having this exact same problem, and I've discussed it with a few others at some length at a swedish forum ( What I've found so far is that the problem seems directly correlated to CPU temperature. Just as in your case, my MB has no problems using only one of the slots with either of my 1GB sticks. However, the problems (mainly extremely laggy GUI/Graphics) appears when using 2x1GB.

    I've been using Big Bang Chess as a benchmark, dragging around the...the...jeez, what's the word in english? Well, just grab the rook (using the more graphically complex version) and see how well it follows your cursor while moving around. Using CoreDuo Temp simultaneously next to the chess game, you'll see your CPU temp climb slowly. Just keep dragging that rook around, and when you (at least when I) reach about 67 degrees celsius, the sound makes a stutter and suddenly I have this huuuge lag while dragging the rook around. Also, using exposé, dashboard or just moving a window around is extremely choppy.

    And it keeps being choppy until the CPU has cooled down to just about 58 degrees celsius. When it reaches 58, everything magically becomes fast again. Sick, huh?

    And this is with 2x1GB. Using the original 2x256MB I get the sound stutter and a very noticeable drop in performance, but it's nowhere near as bad as with 2GB memory. My RAM is TwinMOS, 667MHz, CL5. I used them with no problem whatsoever in a Dell E1505 for three months before I ditched it and got my MB.

    I'm going to try to get my MB sent back in a few days, but do you guys have any clue to what could be wrong?
  11. zure thread starter macrumors newbie

    Jul 8, 2006
    I tried the RAM on my friends macbook but it works fine. Wondering if its the video memory problem
  12. zure thread starter macrumors newbie

    Jul 8, 2006
    Ok i got both my RAM replaced. At first it worked fine. Restarted Parallels many times and it is still fine. Then i left my macbook there for a while and when i went back, IT STARTED TO LAG AGAIN!!! Argh!!

    Apple says that they will charge me $105 if they find that the problem is caused by the RAM (3rd party)! Should i send it in?? Will take 3-4 days =(
  13. MRU Suspended


    Aug 23, 2005
    I had a similar situation to you.

    I bought 2 pieced of 1gb memory for my white macbook

    The memory worked perfectly in the white macbook, just a shame the superdrive didn't.

    So when I replaced the white macbook with faulty superdrive, I went for a black macbook.

    When I put in the memory 2gb, the machine began lagging all over. Its was horrendous. So I removed 1gb of the memory and tried and it was fine, so put in the second again and it was lagging once more. So I assumed my memory was dodgy, so the piece I presmed was lagging got sent back for a replacement.

    In the mean time I put back in a piece of the 256 that came with and used my machine as 1.25gb

    When the replacement 1gb arrived, I opened up my macbook again and put it in, only to find it lagging just as badly :mad:

    So now I'm not sure if its the memory or the computer. It's really peeing me off.
  14. zure thread starter macrumors newbie

    Jul 8, 2006
    Same here. Is it the macbook or is it the RAM. And if i send it in to Apple i have to risk $105 to find out. Worst if they can't find anything and still slap me with the $105 penalty!
  15. zure thread starter macrumors newbie

    Jul 8, 2006
    Wondering if its a heat problem. Just installed coreduo temp. Somehow when i run an application, the temp goes above 70 degrees or around there and it starts lagging.

    Or it could be because of the video ram. I ran big bang board games and it is laggy too. Well the temp went above 70 too but i wonder if its the video or the heat. Might be something else too.
  16. MRU Suspended


    Aug 23, 2005
    Not sure mine will lag within a second or so of boot up. Just open a drive window and attempt to move it and it will lag all over the place..

    Go back to 1.25gb and its a smooth as butter.

    Never had heat problems with my macbook, I've never heard the fans blow yet apart from when burning a dvd.

    Like you say do you gamble take it back to apple and they charge you $105, or take out the memory, but then that's not really showing them the issue? But what if the issue is about 2gb regardless of memory type??? Aghhhh so many possiblities. Looks like it's gonna cost to fix regardless.
  17. zure thread starter macrumors newbie

    Jul 8, 2006
    Yup and it doesn't get laggy immediately. Its like it only gets laggy after a while if you run some application (maybe intensive ones)

    They might just plug in the RAM, sees that it works when booted up and say there's no problem.

    Tsk tsk. $105 is like 1/2 the price of the 100gb harddisk upgrade i am going to get. Argh
  18. Abstract macrumors Penryn


    Dec 27, 2002
    Location Location Location
    I'd think that if you get bad RAM, you'd expect a lot more crashes.
  19. esaleris macrumors 6502

    Oct 18, 2005
    What brand of RAM are you using? Is there consistant brands that just don't work as well.

    Not all RAM is made with the same quality...
  20. Planner Dude macrumors 6502

    May 31, 2006
    Just curious....where did you all get your RAM....can there be a correlation????

    Sorry.....the poster above posted near the same time as me!!!!
  21. MRU Suspended


    Aug 23, 2005
    I got mine from FlashMan on Ebay, a good shre of people on the forum got theres from there too, so i dont think its that.

    Besides doesnt explain why the memory in a white macbook worked great nad causes problems in a black macbook

    So I'm thinking it could be hardware :(
  22. zure thread starter macrumors newbie

    Jul 8, 2006
    This is my theory after hours of testing.

    - I don't think the problem has anything to do with the RAM (I replaced mine and it still doesn't work).

    - The problem has to do with using two sticks of equal size RAM (2x256 2x512 or 2x1gb) I tried 2x1gb and 2x256 myself. Didn't get a chance to try 2x512 bcos i don't have them. The 2x256 are Apple RAMs.

    - The slowness only comes in after the temp (I am using CoreDuoTemp) goes above 70 degrees. And only goes away after the temp goes back to below 70 degrees and stays there for a while. I tested using Big Bang Board Games and Parallels, which are intensive enough to cause the processor's heat to go up.

    - There is no slowness (maybe just a wee tiny bit) when i am using 1gb or 1.25gb of RAM when the temp goes above 70 degrees.

    - I think the problem has to do with the theory that two equal size RAM is suppose to boost performance. Maybe somewhere the configuration or the optimization was not setup or made properly

    - I don't think it is a generic problem across all Macbooks. My friend's working fine. So are many of the Macbook users out there

    MacRumorUser, why don't you try downloading CoreDuoTemp and see if its the same case for you.
    I am probably going to send my Macbook in tomorrow to have it checked. Will send it in with the 2x256 Apple RAM so they don't make a big fuss about using third party RAM.
  23. zure thread starter macrumors newbie

    Jul 8, 2006
    Anyway my RAMs are Patriot and I got them from Sim Lim Square in Singapore.
  24. maxi macrumors regular

    May 23, 2006
    Buenos Aires, Argentina
    So, you get lagging when using 2x256 too?

    if so, by all means send it back and have it checked, cause that's not normal/
  25. Passante macrumors 6502a


    Apr 16, 2004
    on the sofa
    Have you tried opening Activity Monitor and checking CPU usage. You should be able to track if you are maxing out both cores.

    Doesn't the CPU "slow down" when the notebook gets to hot? Perhapts you are seeing this.

Share This Page