2gb ram memory in 1gb slot, is it possible??

2gb ram memory in 1gb slot, is it possible??
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Probably not.
I once tried to put a 4 GB module in a slot where the specs stated max was 2 GB on a HP nc6400 notebook, and it wouldn't boot.
I once was able to do that in a dc7600 desktop PC. Specs called for 4 x 1 GB of memory.
I installed 2 x 2 GB of memory and it worked just fine. Just for fun I had a couple of 1 GB chips and the BIOS reported 6 GB, but windows 7 x64 only reported 4 GB, which was the max it could take.
Let's put it this way, I would not go out and buy a 2 GB chip, and take a chance it will work.
If you have one you can borrow, then give it a try. The worst thing that probably can happen is the notebook won't boot.

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RAM memory discrepancy

My Pavillion m9458f product specification states that this computer comes with 4 GB of memory. However, when I looked this up using control panel/system, it states that this computer only has 2 GB of memory. Why the discrepancy?
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48Camz, welcome to the forum.
Here are 4 programs that you can use to determine the amount of memory in the computer.
Have you made any changes to the computer? Depending on the type of change, this can confuse the readings.
Also, you should Clear the CMOS to see if that helps:
To clear CMOS, follow these steps:
Temporarily set jumper CLEAR_CMOS to pins 2-4.
Wait 5-10 seconds and then return the jumper to pins 4-6.
On the next startup, enter BIOS setup to reset any custom BIOS settings.
This may solve your problem.
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I need to upgrade memory slots on my Mac mid 2010 up to 4 GB module which is currently 2GB with two different 1GB memory slots.Is it compatible and would like to know about the cost?

I need to upgrade memory slots on my Mac mid 2010 up to 4 GB module which is currently 2GB with two different 1GB memory slots.Is it compatible and would like to know about the cost?

this sub forum is about running windows on macs maybe you should try
https://discussions.apple.com/community/notebooks/macbook

Can i use 2gb memory in one slot in my 2006 Mac mini as the 2 slots of 1gb only reports only 1gb memory, both memory work ok in the one slot

Can I use 2gb memory in one slot in my 2006 Mac mini as the 2 slots of 1gb only reports as 1gb memory, both memory work ok in the one slot as I have swapped them over

To my knowledge 1GB modules are the max. size for the 2006 Mini.
2GB modules are not recognized/useable.
Sorry
Stefan

P7N SLI Platinum Unstable with over 2GB ram and/or dual channel memory on.

Hello need some help or to report something to MSI regarding blue screens, freezes when booting Vista 64 (SP1 + all fixes installed) with more then 2GB ram. Single channel mode works (either 1 stick of 2 GB or 3 sticks of 2GB) and is rock stable. Booting with 2 x 2 or 4 x 2 yields instability and blue screens.
I read over Microsoft's hotfix KB929777 however it appears this patch was applied during SP1. http://support.microsoft.com/kb/929777 - when I attempted to apply this hotfix I got the message this update does not apply to your system.
Memory tested in other gaming system using 4 sticks of G.Skill 1066 DDR2 ram and still have the same issues. Other forums like Evga.com, Tom's hardware and 411overkill.com tend to suggest some problem with this new bios version 2.0, written by Nvidia. Some others mention possibly an Nvidia nforce driver issue.
Therefore, under duress during testing - with 1 stick or 3 sticks of ram, all tests perfect and passes all stability tests, good marks in Sandra, plays any game. With 2 or 4 sticks of ram, very unstable won't stay up but for seconds.
Any ideas? (Tested 7 ways until Sunday!)
My other rig, rocks solid and stable with Vista 64.... It's the Evga new mainboard 780i with triple SLI (132-CK-NF78-A1), 8gb of Gskill 1066ddr2, MSI 8800GT (x2 sli mode) Q6600 @ 3.2 ghz - Raid 0 on dual WD caviar 640 gb/sata 3.0gb/sec. Seasonic 700w p/s. 8gb of memory and not a hiccup. Ram 2.0 volts, cpu @ 1.36v. Will handle the memory from both systems with out fault.
Considering I can swap memory back and forth and confirm it's not the sticks, swap graphics boards (own 3 of them!) and rule out that....
Fyi. Any help is appreciated!

Dump question, but have you pickup the correct update e.g. for 64bit? ==> http://www.microsoft.com/downloads/details.aspx?FamilyId=91672C7C-614B-404C-850C-377541E93C18&displaylang=en
"This comes inside SP1 for vista 64, as noted with my other system during the build. "
Better double check it.
Install all four memory sticks and do a memory check with >>Memtest86<< 1st, ensure that no error(s) will comes during testing.
Also how about that?:
Quote from: BOSSKILLER on 07-April-08, 23:55:36
Remove your OC then see how its goes.
"When the system boots in single channel mode (only 2 or 6gb of ram meaning 1 or 3 sticks installed into the 4 slots) its' rock stable. When it boots into dual channel mode (2 x 2 sticks or 2 x 4 sticks) extemely unstable. "
That means, timings are too tight, or they need a bit more vcore help, or some of the memory stick has failure.
"MSI P7N SLI Platinum - MS-7380 - Bios 2.0 on Vista Ultimate 64-bit - all updated."
That BIOS is not for your board, you should use 1.xx

I would like to upgrade my OS to the latest version. I now have 10.6.8 and my machine has 1Gb of memory. Need 2Gb for the new OS. Is is possible (and practical) to add memory to a machine that's five years old?

I would like to upgrade my OS to the latest version. I now have 10.6.8 and my machine has 1Gb of memory. Need 2Gb for the new OS. Is is possible (and practical) to add memory to a machine that's five years old?

You can put two 2gb RAM sticks in your model 2,1 but it can only use 3,3gb. This is a hardware limitation and cannot be changed.
http://en.wikipedia.org/wiki/3_GB_barrier
http://www.everymac.com/systems/apple/macbook_pro/faq/macbook-pro-core-2-duo-3-g b-memory-limitation-details.html
OWC tests have found that there is a slight speed increase with having two 2gb sticks in rather than one 1gb and one 2gb. Your model is in the gray lines at the bottom of the graph. http://eshop.macsales.com/shop/Memory_Benchmark/Apple_MacBook/
You can buy Lion for $29 from the App Store witht a model 2,1 MacBook. Lion will require at least 2gb of RAM but really needs 4gb to run smoothly. As for programs see this list for compatibility with 10.7 http://roaringapps.com/apps:table
Lion doesn't run any Power PC programs. To see if you have any Power PC programs go to the Apple in the upper left corner and select About This Mac, then click on More Info. When System Profiler comes up select Applications under Software. Then look under Kind to see if any of your applications are listed as Power PC. Universal and Intel will run under Lion.
Before Mac switched to Intel processors they used Power PC processors from 1994 to 2005. Power PC 601 through 604, G3, G4 and G5. Applications written for the Power PC processors need the application called Rosetta to run on Intel processors. This was part of the Operating System in 10.4 and 10.5 but was an optional install in 10.6. With 10.7 Lion Apple dropped all support for Power PC applications.
These are good online stores for Mac compatible RAM
OWC http://eshop.macsales.com/shop/memory/MacBook/DDR2/ - They offer Mac tested RAM at very good prices.
Crucial Memory http://www.crucial.com/ - good place to buy RAM from all over the world. They also have an excellent memory selector that allows you to choose memory based on your computer's model
Data Memory Systems http://www.datamemorysystems.com/apple-memory.asp - another good, cheap place to buying RAM if you live in the U.S.
Here are instructions on replacing RAM in a MacBook with a removable battery. http://homeoffice.consumerelectronicsnet.com/articles/viewarticle.jsp?id=44404
If you don’t have the tools to open up the MacBook OWC has a set for $5
http://eshop.macsales.com/item/OWC/TOOLKITMHD/

Hermes 650 system locks up with 2GB RAM, 1GB OK

I have a Hermes 650 system that keeps locking up when system is upgraded to 2GB RAM. System runs fine with 1GB RAM installed. I tried 2 different brands of 1GB sticks, but same problem.

This is a very old barebones, unfortunately memory support is described as "up to 2GB" and as 1GB sticks weren't commonplace at the time, its possible it might just not work.
1GB should be plenty enough for what this system can handle though.
Have you tried testing the sticks with >>Memtest86<<?

I have a Mac OSX Version 10.5.8 When I put in my disc to upgrade to snow leopard version 10.6.3 it tells me I need atleast 1gb of ram memory to download. what can I do

I have a Mac OSX Version 10.5.8 When I put in my disc to upgrade to snow leopard version 10.6.3 it tells me I need atleast 1gb of ram memory to download. what can I do

Your iMac can take a total of 2 GBs of RAM Max.
Maximum Memory
2.0 GB
Memory Slots
2 - 200-pin PC2-5300 (667MHz) DDR2 SO-DIMM
You will be able to install OS X 10.6 Snow Leopard and it will run, but you may not be happy with the performance overall.
OS X 10.6 Snow Leopard and later OS X versions use more and more CPU, GPU and RAM resources.
OS X 10.6, by itself, will use between 2-4 GBs of RAM to run quickly, smoothly and efficiently.
Start running additonal applications and your iMac is going to struggle.
Just fair warning if you notice that your iMac is running slower after installing OS X 10.6.
Good Luck!

I have a iMac 8.1- 2.4 Ghz Intel Core2 Duo with iGb RAM . I wish to upgrade to OSLion which requires 2Gb RAM, which Memory 2Gb card would be the most suitable

I have an iMac 8.1 - 2.4 Ghz Intel Core 2 Duo with 1Gb Ram. I wish to upgrade to OS Lion which requires 2Gb RAM. Which 2Gb card would be the most suitable .

Go to crucial.com
Enter your specs, and buy as much as it'll hold. You'll be happy you did. I've been using them for years. Great company, and the best value for RAM in my opinion. And you don't want to mess with cheap RAM. It can mess EVERYTHING up...

Unable to assemble the RAM memory module into the slot

Can someone tell me how to assemble the RAM module into the slot? I have followed the instructions provided by Mac but I cannot fit it into the slot. I do not know if the module is faulty or I do not apply enough force to get it in (afraid of damage it).

As long as you are certain that the notch in the module lines up with the matching piece in the slot, put equal pressure on both ends as you push. It takes about 20 pounds of pressure to get it to snap in. Just make sure you don't push on one end and not the other and be careful to push straight in.

Performance difference between 1gb and 2gb RAM for Leopard

Hi ..
I'm thinking of upgrading to a 2gb Ram.
Would like to know if other users saw a major increase in speed & performance in Leopard.
Thanks.

No, I didn't see any appreciable speed increase in Leopard, but the increased RAM should help.

My mid 2007 iMac doesn't recognise 2GB RAM module in DIMM/1

I am trying to upgrade the RAM in my mid 2007 iMac from 1GB to 4GB. It originally had a 1GB module in slot DIMM/0 and nothing in slot DIMM/1. I inserted the two new 2GB modules, one in each slot but DIMM/1 just reports as being 'empty'. I have tried swapping the modules and different configurations of 1 & 2GB modules but DIMM/1 only reads the original 1GB module (from DIMM/0) and reports 'empty' when either of the two 2GB modules are installed.
I have reset PRAM, checked EFI firmware update and updated OSX to version 10.6.8 (from 10.5.8) but still the same result. The best I can get is 3GB (2GB in DIMM/0 and 1GB in DIMM/1). I am definitely pushing the modules firmly into place. Is there anything else I can try?

Your machine will accept up to 6GB of RAM however you must a) have the correct specifications, no variations at all and b) must push hard with both thumbs to fully seat the RAM. The correct RAM for your system would be the specifications shown here. I suspect 1 of three things with the RAM you bought.
1. Wrong specifications!
2. Incorrectly installed
3. Defective RAM
I would STRONGLY recommend using Crucial or my preferences OWC, which is the memory shown in the link.
BTW I have a late 2007 24" 2.8GHz iMac with 6GB of RAM.

2GB RAM too much for 1Ghz Powerbook?

Hi
In order to speed up my G4 17" 1 Ghz Powerbook, especially for Photoshop Elements, I upgraded to 2GB RAM. The Crucial Memory Scanner said that was the max allowable (although I ended up buying Samsung memory from an eBay dealer). My computer seems to be actually working slower now, though it is basically working ok. On looking at the tech spec for my Powerbook from Apple Support I then found this: "two SO-DIMM slots support up to 1GB".
Have I put in too much RAM now (who is right about my memory capacity - Apple or Crucial?), or does it make a difference that I bought cheaper RAM than Crucial or Kingston for example? (Presumably if the RAM was suspect I'd have bigger problems?)
Excuse the scattergun questions - I'm just trying to work out if I'd be better off reinstalling my original pair of 512MB modules, or leave in the 2GB and look at other issues in my computer for improving speed.
Many thanks.

To add to eww's excellent advice, there is a note on my RAM vendor's website page for your PowerBook stating that the 17" G4 1G PowerBook is one of four PowerBooks that uses "bus slewing" and have special RAM requirements.
I recall a couple of years ago there was a little...well, call it a "public disagreement" for lack of a cruder term....among RAM vendors over bus slewing and the right RAM. Crucial was accused in these forums and by other companies of failing to recognize the requirements bus slewing placed on the RAM. However, this seems to have settled down as I see posts here stating more recent Crucual RAM worked. You could call Crucial and ask if the part number you bought supports bus slewing. I'm sure they will make certain you get the correct type from them.
Oops, nearly forgot! Bus slewing is explained in this Apple Technical paper on the 15" 1 G PowerBook. Scroll down about a half page to the section "Processor and Bus Slewing."

Hi, I have Mac with Snow Leopard and was trying to purchase Lion , so I can move to I cloud, when trying to buy the app I get a message that a minimum 2gb of memory is required. I went check the hard disck info and it says available memory 20gb :-(

Hi, I have Mac with Snow Leopard and was trying to purchase Lion , so I can move to I cloud, when trying to buy the app I get a message that a minimum 2gb of memory is required. I went check the hard disck info and it says available memory 20gb :-(

Apple Logo, left hand side of the menu bar, About this Mac. It should be right there. If not then More Info, Sys Info.
But it would seem you don't have 2GBs installed and more then likely both RAM slots are already filed. So you just need to buy more RAM in a pair. That could be 2 1GBs chips or if your Mac can have more then that then 2 2 GB chips or 2 4GB chips.
Get your model # and go to Crucial.com and use their memory search to find out how much your Mac can have installed and the price for it. I suggest you install as much as it can take. Cost is very low on RAM these days.

2GB RAM Compatibility

My hp pavilion dv6 3085tx W7-64bit laptop was equipped with 2+1GB Ram (ddr3 , 10600s & 1033),
Recently 2GB ram was stopped to work so i removed it. Now i purchased 2GB RAM(ddr3, 8500s & 1039) but I'm not sure whether it is compatible with my laptop. can i use it along with existing 1gb ram ?
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Memory Type: DDR3 PC3-10600, DDR3 PC3-8500, DDR3 (non-ECC)
Maximum Memory: 8GB
Slots: 2
Each memory slot can hold DDR3 PC3-10600, DDR3 PC3-8500 with a maximum of 4GB per slot.*
*Not to exceed manufacturer supported memory.
Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.

2gb ram memory in 1gb slot, is it possible??

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