OS X :: Upgrading RAM In MacBook - DDR2 667MHz Sticks
Nov 17, 2009
I am trying to upgrade the RAM in my white macbook from 2 GB to 4GB using the RAM from a Sony VAIO laptop. If I put both 2 GB sticks from the other laptop in, my computer turns on but does not boot. The screen never turns on. If i have one of the original sticks in, and one of the new sticks in, it boots up fine and the system profiler recognizes the new RAM and says it is in working order. Why can't I boot with both sticks in? They are both DDR2 667MHz sticks and are all working.
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Jun 23, 2012
how do i install Apple Memory Module 2GB 667MHz DDR2 (PC2-5300) 2x1GB SO-DIMMs in my 2008 mac mini
Info:
Mac mini
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Oct 29, 2010
On my iMac g4 I've got 2 different ram ddr2 speed sticks in there. The standard 256mb apple shipping stick and a faster sodimm, (1.0ghz iMac). My question is will this work just fine, I mean it boots and runs fine or will I get compatibility issues later on?
Dimm0. 1gb. Pc2700u
Dimm1. 256mb pc2100u
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May 16, 2012
My iMac currently has a 1Gig 800 DDR2 memory stick inserted and I was wondering if I can add a 1Gig 667 DDR2, or do I have to use another 800 DDR2?
Just wondering if I have to buy another one, or use the one I already have but has different speed.
Info:
iMac, Mac OS X (10.6)
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Feb 3, 2009
Can you mix old mac pro memory in the new mac pro?
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Jan 19, 2010
For the Mbook Mid 2009 model (Rev. H), in the tech specifications it says it supports 800 MHz DDR2 SDRAM. However, I have 2 sticks of DDR-667 SDRAM lying around so I wouldn't mind using those if I can. Would the Mbook Mid 2009 work with DDR2-667 SDRAM?
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Feb 8, 2010
Does anyone know if this will work. I find they cost the same for 4 gb. I was thinking then I would have flexibility to put into another machine in the future. I know in the PC world this is possible. Not sure about macs.
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Jul 6, 2009
Well im buying a 13 mbp and im going to upgrade to 4gb of ram. what to get?
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Jul 8, 2009
I tried to purchase a 8 gb upgrade kit from owc. The first set of 2x4 gb ram modules gave me kernal panics in every configuration. I sent them back and they sent me another one that was bad. I have a fourth coming in the morning tomorrow, and I am not confident that it will work either. The 4gb of stock apple ram function fine. I ran an extended apple hardware test and my systems supposedly functions normally.
I have a 17" unibody 2.93.
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Oct 5, 2008
I found the "reture/enter" key on my MBA keyboard stands somehow higher than other keys, and not sure if the key would touch the screen when closing the lid. Is there any problem with it and is it the same on your MBA?
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Mar 15, 2012
my webpage often sticks around the end of the www's and does not open
Info:
MacBook Pro, Mac OS X (10.6.8)
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Sep 4, 2010
I just bought this macbook off a friend cause he said he couldn't get it to work so what happens is when i push the f key it types a "�" like if i push the option+f. when i bring up the keyboard viewer when i press the left option key it seems like it auto puts a "�" on the screen and looks like it presses like 4 other keys but if I press the right option key it does nothing if i press right option+f does nothing but works with everything else. just dont know if maybe someone waste some water in it or something cause the left tab key and capslock key sticks sometimes also.
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Oct 24, 2010
I've currently got 12GB of DDR2 667Mhz of RAM in my 2006 Mac Pro, could I use 1066mhz DDR2?
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Oct 29, 2010
does anyone know if there's any 1066 DDR2 FB-DIMM Ram, vie found 800mhz but not 1066..
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Mar 30, 2007
I'm sure there are some sticks that aren't compatible but is there any difference b/w the PC2 a Power Mac G5 (Late 2005) takes and a PC?
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Oct 17, 2008
I'm selling my 2GB of DDR2-667 from my 2008 MBP to someone and they asked if it would work in the PowerBook G4? Would it work and is the RAM backwards compatible (to a certain point)?
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Feb 8, 2010
My friend has a 20 inch iMac (model MB324LL/A) and he has bought 2x4GB SO-DIMMS from cosair. He has put them in and the mac wont recognise them, however it will recognise and boot up with 6GB (using 1 old chip and 1 new one) and he has tried swapping the chips about to make sure one is not faulty.
According to cruicial and Apple the max supported is 4GB but if it runs on 6GB can he get it to work on 8GB somehow?
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Jul 18, 2009
How much of a difference in these specs?
I see MacMALL is selling MBA with the former in both categories and i didnt know how much it will affect my performance. Should i spend the money for the upgraded specs?
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Jun 17, 2010
I have a 1.67ghz G4 PowerBook that has the dreaded lower ram slot failure. This limits me to 1gb of ram, though the machine works fine otherwise. My understanding is that this PowerBook does not accept more than 2gb ram..... So, my question is this: Will this PB not accept more than 2gb ram total, or will it simply not accept DDR2 larger than 1gb each, be it one or two??
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Nov 3, 2010
I'll be ordering RAM from OWC for hex core 3.33 mac pro in the next few days. I can't spend $1k at once on 24GB, so I'm thinking of getting just 2x8GB for now and get the extra stick in about 2 months or so.
I know theres about 25% or so theoretical bandwidth loss with just two sticks, but what's the real, noticeable performance hit vs 3...if there is any?
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Jun 29, 2009
I've looked around but can only find 1GB chips for the original 20" Intel iMac. I'd like to upgrade to 4GB (2x2GB) if possible.
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Nov 21, 2009
Is it OK to use two different size ram sticks if they are the same type/speed?
Say I wanted to fit a 1gb and a 2gb stick into my macbook, but both were 667MHz DDR2, would that cause harm to my system?
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Mar 15, 2009
Last night Lloyd Chambers of [URL] tweaked his DigLloydTools app (DLT) that we use to test memory throughput. It's now more accurate. The bad news is that it showed that when we put 8 sticks of memory in the 8-core 2.26GHz Nehalem, our throughput for memory read/write (memmove) dropped by 1/3. It turns a triple channel memory bus into a dual channel memory bus.
Specifically, in our test, the combined read/write throughput dropped from 9261MB/s to 6195MB/s when we went from 6x2GB to 8x2GB configuration.
Now, don't panic. That doesn't necessarily affect real world app performance unless the particular app you are running is saturating the memory bus. Which apps saturate? I don't know yet. I'm running our complete real world test suite including Pro Apps and 3D Games in both the 12G and 16G config. If I find anything that's significantly slowed by the 8x2G config, I'll post it here as well as on Bare Feats.
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Mar 19, 2009
We just got an extra gig of ram, I put it in the iMac, but it sticks out like 1-2 mm more than the stick already in there. Is that a problem? Or is it just different to the one already in there.
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Jul 8, 2009
i deleted the music off of the usb using my mac, then ejected my usb. When I put it back into my windows pc it said the memory was full. I then put it back into my mac and the files appeared in the Trash so i deleted them.Now there was nothing im my trash, and as soon as i put my usb in there was an old cv which i had deleted of my usb a month ago I don't understand why the files are in the trash when only the usb is plugged in, does this mean that the deleted file is on my mac or usb? and also what is the relationship between mac and usb stick?
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Jul 31, 2008
I am considering purchasing a Mac Pro, probably at the begining of next year when the newer models have (hopefully) been released.
My plan is to get the standard model with Dual 2.8GHz Quad-cores (though this could all change with the new systems) and the lowest memory option - 2GB DDR2.
I plan to upgrade the RAM myself using memory from another supplier such as crucial. I have done this in the past with my macbook (taking it from 1Gb to 2Gb). When I did this I found that apple had installed 2x512Mb sticks from the factory which meant I had to buy 2x1Gb sticks rather than just adding a single 1Gb stick.
My question is, is there any way of telling what I will recieve from apple if I order 2Gb or is it the luck of the draw? i.e. will I get 1x2Gb or 2x1Gb etc etc...
The reason I ask is that I would prefer to use the single 4Gb sticks when I come to upgrade maximise the amount of RAM I can install.
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Jul 1, 2009
Guys Which one is best among the two ?
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Aug 12, 2010
I wanted to bump up the ram but was wondering if I would have any problems by just adding 1 extra stick of 4 gb for a total of 8gb(qty.2 2gb+qty1. 4 gb)
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May 29, 2012
How do I cancel a stuck pinwheel? I have cleaned everything out with MacKeeper, but it still sticks and I haave to cold-boot.
Info:
iMac, Mac OS X (10.4.9)
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Oct 28, 2007
i want cheap ddr pc3200 ram for my g5i mean cheap price not quality i want to know of more generic pc ram that wont give me issues with the g5 so i can do more shopping around and get the best price possiblehave people had any luck with crucial rendition or kingston valueram and other cheap types of ram if so
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