Installing RAM in one slot

I am about to purchase a Mac Mini but the company where I'm purchasing it from only has 1 x 8gb ram module in stock. Can I insert just that one for now and then add another 8gb module at a later stage? Or, do I have to have them in pairs?

Thanks for this. Thankfully Amazon had 2 in stock when I placed the order so managed to get 16GB for the new Mac Mini - now working much better and quicker than my 2010 MBP!
I went for Kingston 1600Mhz ram though as I've always used Kingston and found their Ram and customer service to be fantastic and reliable. Here's what I got x 2: http://www.amazon.co.uk/gp/product/B0089MTON0/ref=oh_details_o03_s00_i00

Similar Messages

4gb ram, only one slot

I have 2gb ram in my macbook and bought another 2 gb ram card and went to put it in and it looked like i could only fit one card in my mac. So, do i have to buy one card that is 4gb insead of 2 cards of 2gb to equal to 4 gb? 'cause i don't see how i can fit another card, it looks like i can only fit one card

GfulDedFan wrote:
If you have the Aluminum MacBook, the second slot is underneath the visible first slot. In other words, the slots are stacked instead of side by side as in the White/Black MacBooks. Please see [*this video*|http://eshop.macsales.com/installvideos/macbook13_unibody_memm>.
You currently have 2 x 1GB modules installed. In order to upgrade to 4GB, you will need to purchase a 4GB kit (2 x 2GB). You could purchase 1 each 4GB module instead and install only one module but the 2 x 2GB would be more economical and give you better performance from using a matched pair. -GDF
I'm not sure if it's the case that 2x2GB as a matched pair would give better performance than 1x4GB. It's kind of complicated, but I'd think everything that's done when switching between 2 modules in matched pairs can be done with the internal "bank switching" that's done in the large memory module. If anything, I'd think 1x4GB might be faster.
Of course I'm basing my belief on my reading of Intel's description of their memory controller. NVIDIA could very well be doing it as true "matched pair" operation where the access is done in parallel with an effectively double-width data bus. I doubt it though. Most of the benchmarks I've seen seem to indicate that the most important factor for performance is having more total memory. If you could effectively double your data bus width with matched modules, I'd expect that there would be substantially faster performance from 2x2GB compared to 2GB+4GB.
http://eshop.macsales.com/Reviews/Framework.cfm?page=/Benchmarks/6gb_tests.html

HT1423 My imac G5 only recognizes one slot after installing 2x2 GB ram

My mac is a early 2009 model running 10.7 software. I realized it was running pretty slow so i decided to upgrade the ram from 2GB to 4GB. After installing it, i checked my memory and it recognizes one slot and not the other.

I swapped them and it showed that the other slot did not recognize it either.
Its the correct RAM for my computer, I contacted the seller and hopefully they would send me another. Thank you!

One slot can not recognize RAM

Hi there
I am using the
HP G62t-350 CTO Notebook PC
I want to upgrage RAM up to 8 GB (already have 1 RAM with 4 GB
However, slot 2 can not recognize RAM I purchased, I replaced that RAM to slot 1, it work correctly, both 2 RAM work. But only one slot work with RAM
What should I do to get it fixed?
Thank you very much

Hi:
If your notebook is still under warranty you should contact HP to get the motherboard replaced because that is the only way it can be fixed.
Paul

Installing ram boot loop

I got recently 16 gb of ram and I installed 12 gb fine in DIMM 2,3,4 but when I put ram in DIMM slot 1 then no display comes on and pc is in boot loop And if i remove from DIMM 2 ram and put in DIMM 1 then the pc boots fine with only 3 sticks of ram. All rams are good and all slots are fine aswell No issiues in ram slots nor the ram. So how do I get the bios to recognize and boot my pc with 4 sticks of ram ? EDIT: Basically what im saying is i cant use 4 ram sticks but only 3 if i put fourth one in then the pc will go in boot loop with no display
My motherboard is B75A-G41 and yes all pins on cpu part are straight. Ram model is ASint DDR3 4gb-1333 SLA302G08-EDJ1C 1233

Board: MSI B75A-G41
BIOS: Newest Available
VGA: ati radeon hd 7750 1gb gddr5 OC
PSU: generic one with 80+ bronze cant remember company name
CPU: Intel pentium G850 2.9ghz dual core oc 3.1 ghz
MEM: 4x ASint ddr3 4gb-1333
HDD: 500 gb samsung 7500rpm hdd
OS: Windows 8.1 64bit and windows 7 64bit
CASE: old early 2000 case for nostalgia :3
EDIT: also tried the cmos reset 2 times already and trying all rams individually was the first thing i did. I remember when i modified the timmings in bios then the pc started fine but didnt recognize 1 and 2 slots and when i changed the mhz to 1066 then again all started fine but didnt just recgonize the 4th stick in dimm 1
2nd EDIT: If it turns out i cant get them 4 rams running so is it okay to have only 3 sticks in pc?

Problems with newly installed RAM

Please help!
At first, my IMac 2008 wouldn't start... It was showing grey screen and beeping 3 times in a row. So I ordered new RAMs (4 GB matching pair) instead of my old 1 GB. After 'playing' with correct positioning for (seemingly) hours nothing was happening at all. Then I put back the old memory in along with 1 new one in the other slot and the computer finally turned on. I went to check if IMac recognized the new memory and it did showing 3 GB of it instead of the 1 GB I originally had. Anyway, it convinced me that the problem is not in the new RAMs I purchased. To make the long story short: my IMac worked for about 15 min. and froze again. I had to turn it off manually. After that I was back to square one. When I put old memory in - I get grey screen with 3 beeps. When I put either one or both new RAMs in - nothing happens. It was my first time swapping the RAMs so I have no idea what I'm doing wrong or if it's me at all. I'd appreciate any help anybody could provide. Thanks in advance!!!

Hi artnsus, I will make this simple for you. I bought 16 gigs of ram from OWC. One stick went bad in a matter of a few days. The grey screen and 3 dong sounds is a a bad stick. The other guy is right, Apple computers are very picky about their ram. I ended up with a kernel panic as well. That's was real fun! Let me say that again. That was not fun! So, here is exactly what OWC emailed me and said I should do after I install ram in my Mac,
Gently clean the memory contacts with a soft pencil eraser and make sure you seat them properly into the slots.
Resetting PRAM and NVRAM (should be done any time you alter the ram configuration)
1. Shut down the computer (should already be off from install)
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until you hear the startup sound ("bong") for the third time.
6. Release the keys.
Let me say this, nowhere in Apple's Instuctions of adding or replacing ram does it say anything like this needs to be done! I don't really get this and to be honest I don't trust buying ram from OWC. Oh, let me also say this. OWC also said that my iMac could take up to 32 gigs of ram while Apple specifies only 16. They say they do testing but they failed my test and honestly I don't see myself doing much business with them again. That's not to say they are to a good company, I just don't think I want to by ram from them again.

Once you install RAM into Mac book, do I just turn it back on? Do I need to perform some type of action?

I received some great replies concerning my increasing the RAM on my laptop. From the information gathered I was able to gather more information and am curious as to what and if there are more steps besides the ones I've listed below:
1. Power off
2. Take battery cover off.
3. Remove battery cover.
4. Remove battery.
5. Remove 3 screws.
6. Remove L bracket.
7. Remove RAM(2 sticks of 512MB).
8. Install new RAM(2 sticks of 1GB).
9. Insure the new RAM is snug into the slot.
10.Reverse the process.
Now at this point do I just power it back up or do I need to perform some other type of action.
Hardware Overview:
Model Name:          MacBook
Model Identifier:          MacBook2,1
Processor Name:          Intel Core 2 Duo
Processor Speed:          2.16 GHz
Number Of Processors:          1
Total Number Of Cores:          2
L2 Cache:          4 MB
Memory:          1 GB
Bus Speed:          667 MHz
Boot ROM Version:          MB21.00A5.B07
SMC Version (system):          1.17f0
Any input would be appreciated.
Thank you,
Tq1

Just turn it back on. The MacBook will automaticly recognize the new RAM.
If the MacBook doesn't turn on the RAM may not be the right speed for a Mac. Macs are very finicky about RAM. Much more so than PCs. The way to test that would be to put one of the old RAM sticks back in one slot and start up.

Company to install RAM, Los Angeles, CA

hi
I'd like to have a company install RAM in my two iBook G4s. I live in Los Angeles, in the San Fernando Valley. Any ideas of reputable companies/individuals is appreciated.
Chuck S

Almost any reseller with a repair department, who claims to
be able to do authorized Apple portable computer work,
should be able to install the RAM; it is not hard to do.
{The info provided through links below should allow you to
upgrade both machines by yourself; and a link to where I
bought Apple certified RAM (from california) follows. It is
not the least expensive, it is original equipment quality.}
And if you buy RAM from some retail places, they can
probably do the task for an additional fee; simple or not.
You can do the work yourself by looking at the following
page link's download do-it-yourself .pdf document pages
and see how to remove the keyboard (& replace it) in one
and also how to add RAM to the upgrade slot beneath it.
Depending on the exact iBook model you have, the details
may vary; some have a place for (and have/not have) an
AirPort wireless card in a location beneath the keyboard,
and others do not even have a place for that card in there;
since the last model iBook G4 mid-2005 series has a wi-fi
component on the logicboard, instead.
There is a small bit of plastic on the keyboard among the
top row of keys and this has a tiny screw in it; a standard
chisel-point screwdriver is used to rotate the screw only
a small distance to unlock the plastic tab so the keyboard
may be flopped over (wires still attached) to gain access.
Two other tiny tabs among the top row are spring loaded
pressure sensitive locks to hold the keyboard in.
The keyboard will tip out away from the display and toward
the palmrests. Do so carefully. Also you may touch the metal
inside there beneath the keyboard to ground yourself prior
to installing the RAM; and be sure to not touch the RAM chips
on their metallic contact sides, because this may short them.
See the pages here and download/read them. You can do it.
Apple Support Manuals - iBook (.pdf downloads)
http://support.apple.com/manuals/#ibook
If you have the mid-2005 iBook G4 12" 1.33GHz or 14" 1.42,
the first item should have the info on the keyboard/RAM in it.
If not, the other items on the download page should suffice.
And if you can't get the keyboard to unlock (it may have been
already and subsequent efforts may have locked it) you could
ask someone at an authorized service provider, maybe over
the phone or in person, which way the screw turns to unlock it.
I have forgotten this, and when I bought upgrade RAM for my
iBook G4, it was under warranty, so I took it to an authorized
reseller and asked why I could not open the keyboard to see
what kind of RAM fit in there, & someone there opened it, free.
At first a clerk tried to pry the keyboard open with a lever thing
and I said, the computer is under warranty and if the screw
thing is already defective, I'd want to know before it's opened.
So the clerk took it to a tech who knew the correct size driver &
how to turn the lock screw the correct direction; it was undamaged.
One of those inexpensive small screwdrivers or sets could be used.
There should be no pressure or torque required since this is weak.
A fair place to buy RAM in the LA area, and does a reasonably good
business outside of the region, is OEMPC-World. The RAM I bought
from them (by first class mail) is this Samsung LH 1024MB chip here:
http://www.oempcworld.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=1.0G-S O2700LH-Samsung
Hopefully this helps, as it should be relatively easy with DIY instructions.
Good luck & happy computing!
{edited: to add info on iBook DIY & CA source for RAM}

Memory Slot Utility "memory modules are installed in the recommended slots"

I've got two Mac Pros that give me this message. Every time I boot them up the Memory Slot Utility gives me the message that my memory modules are installed in the recommended slots.
This started after I installed an additional 8GB of RAM, bringing them up to 16GB. 8x2GB sticks.
I checked the login items and it's not there, so what else could I be missing?

I have this problem too on a Mac Pro Quad Early 2009.
Has 2x4GB + 2x1GB Runs fine with 10GB, but everytime I log in the memory utility pops up as if I have a problem.
How do I stop it annoying me?

How to install more than one instances on one machine

Hi ALL,
I want to install more than one instances on one machine, but i am a freshman on SAP field. How and where can i get the related infomation for that? thank you very much !!

Hi tieyan,
Glad the information was of some help.
For Windows, there is an older note <a href="http://service.sap.com/sap/support/notes/28392">28392</a> that has some more information. It is important also that the SAP parameter PHYS_MEMSIZE is sized correctly according to note <a href="http://service.sap.com/sap/support/notes/88416">88416</a> (the bottom of the note gives some examples). For example, if there were two central instances and the two Oracle database instances on one host, PHYS_MEMSIZE for both instance profiles (of the central instances) would be 35% of the RAM (1/2 of 70%). In the case of MSSQLSRV 2000, for PHYS_MEMSIZE you would refer to the scenarios of note <a href="http://service.sap.com/sap/support/notes/327494">327494</a>.
If you ever want to thank somebody else for helping in answering a question, the <a href="https://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement">Rules of Engagement</a> has a section 'Thank Others by Giving Points' that explains this further.
Regards, Mark

Installing RAM to imac G4 flat panel

How difficult/dangerous to the computer's wellbeing is it to replace the factory-installed RAM oneself? Apple recommends bringing it to an authorized service (I assume because this model is tricky to open), but the Apple store will only do the install it if I purchase RAM from them - which is 50% more than at Crucial. In any case, I couldn't find a DIY install manual for my model on this site. Any insight and advice would be greatly appreciated...

Here's a DIY guide for you.
http://www.xlr8yourmac.com/systems/iMacg4/imacg4takeapart.html
Of course, this will void any warranty you have left (if any) on your iMac.
I've done this for one of my iMacs and it wasn't too bad.

8.00 GB of installed RAM/MEMORY but only 3.99 GB "usable"

Here is my system:
OS: Windows 7 Home Premium 64-Bit
CPU: Intel i5 750 @ 2.67Ghz
Motherboard: MSI P55 GD65
Ram: G.Skill 4x 2gb 240-Pin DDR3 1333 (PC3 10666) dual channel memory (8gb total)
BIOS shows 8gb of installed RAM, Task Manager shows 8gb installed RAM, Resource Manager shows 8gb installed RAM. Right-clicking My Computer > Properties shows "Installed Memory (RAM): 8.00 GB (3.99 GB usable)"
With all the research and other forums posts I found, I have:
- Tested all 4 ram sticks individually (before the G.Skill I had the same problem with 2 Kingston sticks)
- Unchecked maximum memory in msconfig.exe > BOOT > ADVANCED
- Updated BIOS to latest version (1.11 a.k.a 1.B0)
- Loaded BIOS optimized defaults
- Cleared CMOS and loaded optimized defaults again
- Tested memory with Windows Memory Diagnostics tool with no errors
- Removed CPU to check socket for bent pins...no bent pins...reseated CPU
I have not:
Enabled "Memory Remapping" in BIOS because I do not have that option available in BIOS
I did read this post about G.Skill ram: https://forum-en.msi.com/index.php?topic=178019.0 and checked by ram settings and they are automatically already at the 9-9-9-24 timings, 1T command rate.
Yikes! What else is a man to do?

Quote from: RemusM on 17-March-14, 15:34:37
OK.
Perform the following tests with 2 memory modules (4GB RAM):
1)
1.a) use the slots 1 & 2 (those close to the CPU).
Check out the usable system memory
1.b) use the slots 1 & 3
Check out the usable system memory
2) msconfig.exe / Boot / Advanced
2.a) set the max memory to 4096MB and reboot
Check out the usable system memory
2.b) unset (uncheck) the max memory setting and reboot.
Check out the usable system memory
3) use the same 2 memory modules (4GB), access the BIOS and make them run at 1066MHz (7-7-7-20 at 1.50...1.55V)
If all the above don't fix the issue, post a screenshot of the memory mapping (System Information / Hardware Resources / Memory)
Good luck.
Alright, RemusM...got some new developments here. Thanks for sticking with me....
1)
1.a) Slots 1 & 2 (single channel mode): 4gb installed, 4 gb read and usable by OS
1.b) Slots 1 & 3 (dual channel mode): 4 gb installed, 4gb read but only 1.99 usable by OS
I stopped there and did some more slot tests...and I stand corrected from my earlier comments (I had written down that each stick worked in each slot, individually, but these notes are from 5 years ago...so...however):
With only 1 stick installed (2gb), starting closest to CPU:
- Slot 2 (blue plastic slot): PC will not start, motherboard beeps 3 long beeps (ram error, from what I Googled)
- Slot 1 (black plastic slot): PC starts, 2gb read and usable by BIOS and OS
- Slot 4 (blue plastic slot): PC will not start, motherboard beeps 3 long beeps (ram error, from what I Googled)
- Slot 3 (black plastic slot): PC attempts to start (3 times, fans and lights start and then stop) and then it hangs (with fans and lights on but does not start)
Would I be right to assume my Slot 3 has been the problem all along? Or is the motherboard supposed to only start with 1 stick of ram in slot #1?
Also of note: since I first built this computer it has always took 3 attempted starts (fans and lights go and stop) to finally fire up (I know, I should have realized this red flag sooner and probably mentioned it).
Also of note: with 3 sticks installed - in slot 2,1,3 - the system reads all 6gb but only 3.99 usable by the OS again. Indicating, I would think, that only slot 2 and 1 are being used.

Can I combine a PC3200 DDR SDRAM with PC25300 DDR2 SO-DIMM when installing ram?

Can I combine a PC3200 DDR SDRAM with PC25300 DDR2 SO-DIMM when installing ram? I am taking ram out of an iMac G5 ALS (2005) to add to the 1GB ram (3GB max) iMac late 2006 model.

kbentz wrote:
The slots are different sizes I have found out as well. Thanks for the advice!
Yes, there is that small issue but even if they were the same slots you'd just be disappointed a little later.

Putting ram in bottom slot on Wallsteet?

Can anyone tell me how to install ram in the bottom slot of a 233mhz Wallsteet PB?
Also,what is the max amount of ram that can be installed in the bottom slot? I have 256mg in the top slot and 32mg in the bottom and want to put 128mg in place of the 32mg.
The 128mg was originally in the top slot.
Any help would be greatly appreciated.
Thanx noj
g3.366.ibook.576ram-[2]s/l. 333grape imacs [1]288mgram[1]128ram both osX Mac OS X (10.3.8)
g3.366.ibook.576ram-[2]s/l. 333grape imacs [1]288mgram[1]128ram both osX Mac OS X (10.3.8)

noj,
The Wallstreet can handle a maximum of 512MB (2 x 256MB); the memory for the lower/bottom slot requires a low-profile module. Measure your 128MB module; if it is less than 1.5 inches tall, it should work in the bottom slot.
Also, the early iMac, Wallstreet, and Lombard require special 256MB modules made specifically for these computers; the 32/64/128MB modules can be generic as long as they meets the Wallstreet specs. Here is an example of the memory for the Wallstreet:
http://eshop.macsales.com/shop/memory/iBooks-PowerBooks/G3-Lombard/
Andrey pointed you to a good takeapart guide...here is the specific model:
http://www.pbfixit.com/Guide/3.0.0.html

What do I need to do AFTER installing RAM

OK
I just upgraded two G5 dual processor machines in my dept.
Went from 2.5G to 4G in one and 1G to 4G in the other.
I really have not noticed any sizeable improvement in speed.
System profiler says "OK" on memory. They are all matched, same brand etc...
MAC HELP did not have any tips about installing RAM.
My question is; must I do anything AFTER installing RAM such as reset PRAM, permissions etc...

No. There is nothing more you need to do.
Going from 2.5 to 4 will probably not make that much difference, unless you are using high-end apps like Final Cut Pro that use a lot of RAM, or you run many apps at the same time.
I definitely noticed a big difference going from 0.5 to 1.5. I only noticed a small difference going from 1.5 to 2.5.

Installing RAM in one slot

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