HT3011 Memory Upgrade

I have an iMac with four memory slots. Two slot have 2G DIMMs and the other two are open. Can I add two 4G DIMMs to the open slots without causing any issues or do all the DIMMs need to be the same size

Without knowing exactly what model iMac you own answering that question is difficult at best. Please navigate to Crucial.com or to OWC (www.macsales.com) who are both reliable RAM resellers. Both places can assist you with choosing the correct RAM for your machine and OWC even has install videos for your year and model iMac whatever it might be.

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I have a iMAC(got it in less than 2 months ago), can I change the memory(upgrade it from 4 GB to 8GB) myself? I mean I need to open the screws and exchange the memory chips. Does it cancel the guarantee?

I have a iMAC(got it in less than 2 months ago), can I change the memory(upgrade it from 4 GB to 8GB) myself? I mean I need to open the screws and exchange the memory chips. Does it cancel the guarantee?

No, unless you break something or install the wrong RAM, new RAM is not covered by warranty/AppleCare of course.
https://support.apple.com/kb/HT3011
https://discussions.apple.com/docs/DOC-4291

Memory upgrade on iMac G3 700, help with system crashes

I tried to do a memory upgrade on my iMac, so I bought two kingston 256 MB PC133 modules, but none will work, the system starts, but hangs in about two minutes after loading the desktop. I went back to use the older memory module wich is an spectek, but I need the upgrade, any ideas?
Thanks!
FedericoMG.
Ps: Sorry about my english... I'm from Argentina... :-P

Hi Federicomg
The iMac 700 G3 should have been supplied with 1 stick of 256mb ram. However which is the correct type i am not sure as the Apple specifications for this model state PC100 whereas my iMac G3 700 graphite was supplied with 256 MB PC133-333 SDRAM
http://support.apple.com/specs/imac/iMacSummer2001.html
Apple profiler from my iMac this is the original supplied RAM from Apple:-
DIMM0/J13: Size: 256 MB
Type: SDRAM
Speed: PC133-333
1) I would re-instal the original ram and open system profiler to see what type the ram is.
2) Keeping the original stick in place add another stick of the new ram and look again in profiler to see if its recognised and again try the second stick to see if there's a problem with one of the sticks.
I am currently running my iMac with a small upgrade of RAM and the additional RAM is 128MB of PC100 and i have noticed the performance improvement since adding the PC100 so it's working and i have suffered no ill effects doing this..
paul..

MS-6195 memory upgrade

Hi,
My system is based on Ms-6195 K7 pro and Athlon 700 mhz. 192 Mb Ram (128Mb module + 64Mb module)
Problem:
when I try to upgrade memory with a sdram 256Mb PC100 module, the memory test can't finish and my system don't boot.
Please can you tell me how configure coreectly the BIOS or tell how to do.

MS-6195 memory upgrade.
I have also tried using new PC100 256Mb memory and am getting nowhere.
The ones that I have bought are single sided, [8 chips on only one side]
and do not work with my motherboard, however, if I put them into another,
older PC, it shows up as 128Mb.
So I assume that the DIMM is working OK, and that the 'old' PC has a memory size limitation??
I have tried the same things as wbs and Grommit and got the same results.
So I assume that the answer is in getting older DIMMs, double sided with 8 chips on either side.
Does this seem to be about right???

Memory upgrade fail - Kernel panic after put old memories back

I People, this is my first post here and unfortunately is to report a problem, not to help friends.
I did an memory upgrade last weekend. After this, he will not boot normally, only in safe mode.
I discovered that they sent me 1333Mhz memories, and my mac (mid 2009) supports only 1066Mhz.
I put the old memories again, however I believe that the system did not recognize.
As you can see below, the system recognizes two modules:
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353237334448302D4348392020
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334648302D4346382020
It is not true, I' using now 2 x 2GB, DDR3, 1067 Mhz (stock)
I tried to reinstall the system, but when I try, I got crash again.
how can I solve this issue?
Interval Since Last Panic Report: 5298 sec
Panics Since Last Report:          6
Anonymous UUID:                    EAEB74C4-4B23-BCC2-1A48-B6FEB255C9FF
Mon Apr 1 16:37:33 2013
panic(cpu 1 caller 0xffffff800e0876ab): "Spinlock acquisition timed out: lock=0xffffff8011bff270, lock owner thread=0x10d9fb0aa, current_thread: 0xffffff801f873000, lock owner active on CPU 0xffffffff, current owner: 0x10d9fb0aa"@/SourceCache/xnu/xnu-2050.7.9/osfmk/i386/locks_i386.c:363
Backtrace (CPU 1), Frame : Return Address
0xffffff80f54fbd10 : 0xffffff800e01d5f6
0xffffff80f54fbd80 : 0xffffff800e0876ab
0xffffff80f54fbdb0 : 0xffffff800e06256b
0xffffff80f54fbf40 : 0xffffff800e0b7f69
0xffffff80f54fbfb0 : 0xffffff800e0ce3d1
BSD process name corresponding to current thread: diskarbitrationd
Boot args: config="\OS X Install Data\com.apple.Boot" root-dmg=file:///OS%20X%20Install%20Data/BaseSystem.dmg
Mac OS version:
12A269
Kernel version:
Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64
Kernel UUID: 8D5F8EF3-9D12-384B-8070-EF2A49C45D24
Kernel slide:     0x000000000de00000
Kernel text base: 0xffffff800e000000
System model name: MacBookPro7,1 (Mac-F222BEC8)
System uptime in nanoseconds: 8887270925
last loaded kext at 1689458563: com.apple.driver.AppleUSBTCButtons     235.4 (addr 0xffffff7f8f6c7000, size 20480)
loaded kexts:
com.apple.driver.AppleUSBTCButtons     235.4
com.apple.driver.AppleIRController     320.15
com.apple.driver.AppleUSBTCKeyEventDriver     235.4
com.apple.driver.AppleUSBTCKeyboard     235.4
com.apple.driver.DiskImages.ReadWriteDiskImage     344
com.apple.driver.DiskImages.SparseDiskImage     344
com.apple.driver.DiskImages.UDIFDiskImage     344
com.apple.driver.DiskImages.FileBackingStore     344
com.apple.driver.DiskImages.HTTPBackingStore     344
com.apple.driver.DiskImages.RAMBackingStore     344
com.apple.driver.AppleFileSystemDriver     3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless     1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib     1.0.0d1
com.apple.BootCache     34
com.apple.driver.AppleUSBCardReader     3.1.0
com.apple.iokit.SCSITaskUserClient     3.5.1
com.apple.driver.XsanFilter     404
com.apple.iokit.IOAHCIBlockStorage     2.2.0
com.apple.driver.AppleSmartBatteryManager     161.0.0
com.apple.driver.AppleUSBHub     5.1.6
com.apple.iokit.AppleBCM5701Ethernet     3.2.5b3
com.apple.driver.AirPort.Brcm4331     600.15.20
com.apple.driver.AppleFWOHCI     4.9.5
com.apple.driver.AppleAHCIPort     2.4.0
com.apple.driver.AppleUSBEHCI     5.1.5
com.apple.driver.AppleUSBOHCI     5.1.5
com.apple.driver.AppleEFINVRAM     1.6.1
com.apple.driver.AppleRTC     1.5
com.apple.driver.AppleHPET     1.7
com.apple.driver.AppleACPIButtons     1.6
com.apple.driver.AppleSMBIOS     1.9
com.apple.driver.AppleACPIEC     1.6
com.apple.driver.AppleAPIC     1.6
com.apple.driver.AppleIntelCPUPowerManagementClient     196.0.0
com.apple.nke.applicationfirewall     4.0.39
com.apple.security.quarantine     2
com.apple.driver.AppleIntelCPUPowerManagement     196.0.0
com.apple.driver.AppleUSBMultitouch     235.7
com.apple.iokit.IOUSBHIDDriver     5.0.0
com.apple.driver.DiskImages.KernelBacked     344
com.apple.iokit.IOSCSIBlockCommandsDevice     3.5.1
com.apple.iokit.IOUSBMassStorageClass     3.5.0
com.apple.driver.AppleUSBMergeNub     5.1.5
com.apple.driver.AppleUSBComposite     5.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice     3.5.1
com.apple.iokit.IOBDStorageFamily     1.7
com.apple.iokit.IODVDStorageFamily     1.7.1
com.apple.iokit.IOCDStorageFamily     1.7.1
com.apple.iokit.IOAHCISerialATAPI     2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily     3.5.1
com.apple.iokit.IOUSBUserClient     5.0.0
com.apple.iokit.IOEthernetAVBController     1.0.2b1
com.apple.iokit.IO80211Family     500.15
com.apple.iokit.IONetworkingFamily     3.0
com.apple.iokit.IOFireWireFamily     4.5.5
com.apple.driver.AppleMCP89RootPortPM     1.11
com.apple.iokit.IOAHCIFamily     2.2.0
com.apple.iokit.IOUSBFamily     5.1.6
com.apple.driver.NVSMU     2.2.9
com.apple.driver.AppleEFIRuntime     1.6.1
com.apple.iokit.IOHIDFamily     1.8.0
com.apple.iokit.IOSMBusFamily     1.1
com.apple.security.sandbox     220
com.apple.kext.AppleMatch     1.0.0d1
com.apple.security.TMSafetyNet     7
com.apple.driver.DiskImages     344
com.apple.iokit.IOStorageFamily     1.8
com.apple.driver.AppleKeyStore     28.18
com.apple.driver.AppleACPIPlatform     1.6
com.apple.iokit.IOPCIFamily     2.7
com.apple.iokit.IOACPIFamily     1.4
com.apple.kec.corecrypto     1.0
Model: MacBookPro7,1, BootROM MBP71.0039.B0E, 2 processors, Intel Core 2 Duo, 2.4 GHz, 8 GB, SMC 1.62f7
Graphics: NVIDIA GeForce 320M, NVIDIA GeForce 320M, PCI, 256 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353237334448302D4348392020
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334648302D4346382020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8D), Broadcom BCM43xx 1.0 (5.106.98.100.16)
Bluetooth: Version 4.1.3f3 11349, 2 service, 11 devices, 0 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: ST9500420AS, 500.11 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0x24600000 / 2
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0x26100000 / 2
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06600000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8213, 0x06610000 / 7
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x06500000 / 3
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0236, 0x06300000 / 2

Hi BGreg,
I already reset the PRAM as you said.
I've cleaned the memory modules as indicated by Linc above.
Today I formatted my harddrive to try a clean install, but system crashs after 5%, 10%.
There is something making me worried:
In one of my tries, I opened the system view to check my actual hardware configuration, and to my surprise, the system shows me 8GB installed. Cannot be. I have 2 x 2GB.
Where my system stores this information? There is a way to reset it? I tried last hour install the snow leopard, that cames with my mac, by DVD, but does not worked too.
Thank you all so far.
Giuliano

Memory upgrade

Hi,
Can I install 2 x Crucial 4GB DDR3 - 1333 SODIMM 1.35V 204 PIN - CT51264BF1339J on a Macbook Pro 13 inch late 2011?
Currently, I have 4 GB (2 x 2 GB) and I want to upgrade to 8 GB. There is a controversial info regarding this particular memory module, some people say it is not compatible.
When I look to the specs I find:
204 PIN form factor = OK
1,35 V = OK
DDR3 = OK
1333 = OK
SODIMM = OK
Max 8GB = OK (2 x 4GB)
Latency= 9 cicles (same that stock modules supplied with the laptop) OK
The thing is Crucial, sell an identical specs module that costs quite more. They claim it to be compatible with Mac. The also sell this one I mentioned as being not compatible. The funny thing is that specs for both are identical. I only find a difference on the pricing. So I am really confused.
Do they one to sell me a more expensive one like being specific for Mac or there is a hiden specification that makes the two modules to differ from each other?
Can somebody confirm this info to me, please?
Many thanks in advance
Best Regards

News on this subject:
A Crucial support representative replied saying:
"Mac compatible memory is guaranteed to work in your specific system. There may be subtle differences in non specific memory that will cause it not to work for you such as chip solution and the configurations of chips..."
Well, I find it very ambiguous technically speaking. If they sell good quality memory as they claim, I do not see which subtle differences will affect the functionality. The chip configuration is standard and chip solution is about quality. So Crucial should be all right as everyone claims (even if manufactured in China)
So I went a head and both 2 x CT51264BF1339J for a very reasonable Belgian price and installed it into my system just two minutes ago. I am writing this using the mentioned system.
I was on Google after 30 seconds of taping the On button. Although it did not changed a lot as this startup timing is more related to the Hybrid 750GB HDD (SSD + Conventional Drive) I upgraded few months ago.
I upgraded the memory to run Virtual Box and Parallel desktop more easily though it worked quite good with 4GB. I did not upgraded to 16GB because it is not necessary on my usage. Only one virtual machine at once + E-mail + Browser + some PDF opened. Some technical stuff and nothing like Photoshop or similar. Thus the huge money difference would have gone for nothing if I buy the specific Mac modules of 8GB each as "Crucial Memory Upgrade Tool" subjected me.

Memory upgrade not working

I ordered 8GB memory for my imac mid-2011 model.
I then tried to install and all I'm getting is three beeps telling me there's something wrong with my memory.
I've tried all configurations but can't get the 2x4gb modules to work.
I've had to stay with only the original 2x2gb ones it came with.
Can anyone please help.
The only difference, besides the size, between the two modules is that on the 4gb ones is says PC3-10600S-9-10-F2 and the 2gb ones say all the same except instead of F2 at the end it's F1.
Cheers.

Which would seem to suggest that you may (unusually) have a doubtful memory module. Less unusually, you would have paid over the top for it.
Many people on these forums speak well of the following suppliers.
In North America contact OWC … Upgrade Apple iMac Memory
In Europe contact Crucial.com … RAM Memory Upgrade
Both companies have facilities to guide you and will recommend the correct memory package to meet whatever needs you describe to them.
There may be benefits buying from your own geographical location insofar as Shipping charges, Local sales taxes and Exchange rates. Check out the basic memory costs and do your sums next time you buy.

Memory upgrade on Satellite Pro L40-15d

Hi
I have Satellite Pro L40-15d with 512 memory (Samsung) but I wont upgrade to 1GB. I have Kingston ktt667d2/1g I have tray to put in to both slots but nothing work I cant switch on computer.
But when I change for old one laptop is ok. What can I do? Install special program or update BIOS or maybe the memory stick is broken.
Regards

Hi
The notebook doesnt boot after the memory upgrade due to these different issues;
- memory modules are not compatible together
- memory modules are not compatible with the notebook
- memory modules are faulty
- one of memory slots is faulty
In most case the memory module replacement helps.
One hint; did you try to switch the memory modules in the slots? Sometimes this helps.
Several weeks ago I have updated my memory and the notebook didnt boot.
I thought its a memory malfunction but after module switching the notebook booted correctly.
Good luck

Memory upgrade on Satellite A50-104

I NEED TO FIND A 512MB MEMORY UPGRADE FOR MY A50/104 ANYONE NO THE CORRECT ONE TO BUY, I WAS TOLD ON EBAY THAT 512 DDR SODIMM IS THIS RIGHT. ALSO HOW DO I CHECK ON MY LAPTOP FOR THESE DETAILS IF THERE ARE ANY AND ANY OTHER SPEC BATTERY ,HARDDRIVE ETC

Hi
You have several ways to find out what memory module is compatible and supported.
You can use a diagnostic too like Everest, you will check the user manual or the Toshiba website for details or you will contact the service in your country for supported modules.
I will try to answer the question: The Satellite A50 should support PC2700 DDR-RAM like these parts:
PC2700 256MB (PA3311U-1M25)
PC2700 512MB (PA3312U-1M51)
PC2700 1024MB (PA3313U-1M1G)
Now its your choice. You can also google for the offers
By the way: Visit the Toshiba Options & accessories site. There you will find compatible parts

Memory upgrade on Satellite Pro A40

Can anyone please advise where is the best place I can get a memory upgrade for my Satellite Pro A40 laptop.
I think my machine is a PC2700 DDR. I am looking for either 512mb or 1gb.
Thanks in advance.
Christine

Hi
On the Satellite Pro A40 you will find 2 memory slots and you can upgrade the memory to max 2GB (2x1024MB)
It should be possible to use these modules:
PC2100 512MB (PA3164U-1M51)
PC2100 1GB (PA3278U-1M1G)
And
PC2700 512MB (PA3312U-1M51)
PC2700 1024MB (PA3313U-1M1G
I purchase the compatible parts and devices always form the Toshiba service partner in my country because so I'm 100% sure that this parts are compatible.
So I would recommend you also to buy the modules form the ASP in your country.

Memory Upgrade on Satellite Pro A60

I have upgraded an A60 Pro with a 1GB memory up but the Control Panel /System/ General tab still shows it as having 192MB RAM. This limits me downloading some Security Software from BT Yahoo.
Can anyone advise on how I can make the machine recognise the new RAM or is the 192 MB RAM noted different memory from the new memory upgrade?

If you use non-compatible RAM module it is logic that system can not recognize it correctly. I do not know who is the manufacturer of this 1 GB RAM module but if you want to use compatible one pick up some info about PC2700 1024MB (PA3313U-1M1G) or check Kingston web page.

Memory upgrade on NB300-108

Looking to upgrade Ram memory to 2gb on my NB300-108
Have looked at Toshiba website and the cost but there appear to be a plethora of alternative websites with compatible memory upgrades when I put in the part number.
Would welcome any experiences of the forum regarding alternatives etc
Thank you

According notebook specification you can upgrade your NB to 2GB. I recommend you to use high quality module offered by Kingston. All info about it you can find here .
I have NB520 so I cannot tell you more about NB300.

Memory Upgrade on DV7T-3000 (NQ339AV)

Hello,
I have a Pavilion DV7T-3000 with i7-820QM Processor. I am planning on a memory upgrade. Has any one tried upgrading it to 16GB RAM ? (2 x 8GB). As per specs it can only go up to 2x4 GB.
Thank you for for any feed back.

I believe you should try to PM a level 8 or higher expert here and see if they will access someone from HP.
Reminder: Please select the "Accept as Solution" button on the post that best answers your question. Also, you may click on the white star in the "Kudos" button for any helpful post to give that person a quick thanks. These feedback tools help keep our community active, so you receive better answers faster.

Memory upgrade on the NB550D-11D - 4GB RAM are possible

To anyone who's thinking about a memory upgrade on the NB550D:
The NB550D supports up to 4GB of memory, not only 2GB as mentioned by Toshiba in their specifications.
A memory upgrade to 2GB is _only limited_ by the pre-installed Windows 7 Starter OS, not by the netbook itself.
I'm using Linux Mint 11 Katya, 64bit and my system is running perfectly well with a 4GB ram module. If you want to use full 4 GB ram support, get rid of the Win 7 Starter OS.
The specification for higher volume ram is DDR3 1333MHz PC3-10600 SO-Dimm. I've chosen one 4GB module by Corsair, due to the 30 years warranty Corsair offers.
It took me quite a while to find this out, hope this is going to be a help to everybody who's just as unsecure as I was how to upgrade the NB550D memory. Good luck. ;o)

> A memory upgrade to 2GB is only limited by the pre-installed Windows 7 Starter OS, not by the netbook itself.
I can confirm this. Two days ago Ive installed own Win7 32bit Home Premium and upgraded my NB520 with 4GB RAM. 3GB are in usage now and notebook runs perfectly.
With original Win7 Starter version I have noticed annoying display behaviour while watching action movies. When the scene in the movie was without movement everything was ok but by action scenes some strange lines were shown on the screen.
Now after own OS installation everything works perfectly and Im so happy with my NB520.
I can just recommend it for everyday usage.
By the way: I use 4GB SO-DIMM DDR3-1333Mhz PC3-10600

Memory upgrade for Satellite L30-134

I have a Satellite L30-134 which appears to be running quite slowly - I think due to large amount of photos and itunes music.
I am wondering which is the easiest way to resolve - buy a memory upgrade (no idea how to change the memory though) or get an external hard drive?
And if I change the memory will I lose what is already saved on the laptop?

I agree with Ganz the bigger HDD will not improve the performance but only increase the available HDD space it would helps you to store more music and pic files on the HDD ;)
The memory upgrade would also not bring an performance boost of course the performance would be a little bit better because the most stuff would be handled directly in the memory and not temporally on the HDD but generally its not really noticeable.
Anyway if you want to upgrade the memory check this:
http://www.orcalogic.co.uk/asp/prodtype.asp?prodtype=25737&ft=m&st=3
You have to use DDR2 533MHz (PC2-4200) 200-PIN SODIMM

HT3011 Memory Upgrade

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