786GTM-E45 4GB Ram Installed 3GB reported by XP

I have a 785GTM-E45 mobo with 4GB of RAM installed. The BIOS reports 4GB but Windows XP sp3 reports only 3GB. have verified that each memory stick is good and that 2GB can be read in each slot.
Have Win XP sp3, 2x2048 Corsair DDR2 modules, AMD Phenom X4 9850 Quad processor.
Anybody ever see this and discover the culprit?
Thanks

It can vary from one PC to the next, for instance mine shows 2.98 GB available. Normal average range would be from that to about 3.2 GB or so.

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P6N SLI Platinum Mainboard - 4GB RAM installed, 3GB showing (closed)

I didn't have too much time to trouble shooting this myself, but maybe you guys can help. The BIOS picks up 4GB RAM and after a fresh install of Windows XP 32bit, Windows is telling me that only 3GB is installed. Does anyone have a solution for this?
Thanks.
Specs:
Mainboard - P6N SLI Platinum
CPU - Intel Core 2 Duo E6600 Conroe 2.4GHz 4M shared L2 Cache LGA 775 Processor
RAM - G.SKILL 4GB (4 chips) 240-Pin DDR2 SDRAM DDR2 800
HD - Western Digital Raptor WD740GD 74GB 10,000 RPM Serial ATA150 Hard Drive
Video - EVGA GeForce 8600GTS 256MB
Power - APEVIA ATX-AS680W

Quote from: adamzeliasz on 02-June-07, 02:10:58
Does Windows XP 32Bit still use all 4 GB but only showes 3GB? Or if I want to use that additional 1GB I need XP 64Bit? If I install x64 will it work with 32 bit applications fine?
"Does Windows XP 32Bit still use all 4 GB but only showes 3GB? "
no.
"Or if I want to use that additional 1GB I need XP 64Bit?"
yes.
"If I install x64 will it work with 32 bit applications fine?"
yes. pretty old 16 bit application will refuse to work, also you will need to use x64 drivers.

Satellite A100-750 PSAAR, 4GB RAM installed, 3GB RAM usable

I've just upgraded the RAM of my Satellite A100-750 from 2x1GB to 2x2GB.
The BIOS recognizes 4GB of RAM
but then the BIOS output states "3GB system RAM passed".
My Windows 7 Pro 64bit OS says that there are 4GB RAM, but only 3GB are used.
How can I use all my 4GB RAM?
It shouldn't be an OS issue but maybe a BIOS one.
I've tried to update my BIOS (now System BIOS version 6.0),
but with no success.
Any suggestion?
Thank you very much in advance,
Carlo

Dear Andrej,
thank you for this link.
It seems that my BIOS doesn't support the memory remapping feature,
or at least I can't find it anywhere in the BIOS setup (any help?).
At this point my question is if Toshiba will deliver in the near future
a BIOS able to setup memory remapping for Satellite A100 series,
or if it is possible to enable this feature using the BIOS of another series.
Frankly it seems to me quite odd that Toshiba sells a laptop
certified to support 4GB of RAM and 64bit mode instruction set
but at the same time it doesn't provide a BIOS able to actually exploit 4GB of RAM.
How can I setup memory remapping on my laptop?
Thank you to everybody,
Carlo

Mac Mini 4gb RAM installed; 2gb showed

Hello everybody; I've bought a Mac mini (1,83 ghz, 500gb HD 4gb ram) and it's only showing me 2gb of ram. (I know that I usually can put only 2gb in it) my question is: how can I get the full 4gb?

Hi Tom,
while 800MHz RAM should work, there are numerous reports that only one 800MHz module runs successfully, while two of them somehow prevent Macs from starting up.
So my proposal would be to use two 667MHz modules.
Regards
Stefan

Satellite C55-A-19N: 4GB RAM installed but only 2,39 is usable

Hello,
I have Toshiba satellite C55-A-19N with Windows 7 32-bit. It has 4 GB of installed memory, but only 2,39 is usable.
Bios is the last.
I can not find anywhere in the system the ability to change it.
My desktop with core i5-2500K can see 3.29Gb from 4Gb RAM, why toshiba cant see it?

The shared part depends on the RAM amount which is installed.
The notebook description and the NVIDIA GeForce 710M details says this:
Video card: up next to 3787 MB with 4 GB system memory installed
and up to 4,095 MB with 6 GB of system memory (64-bit Windows operating system only).
So the shared part seems to be bigger than 300MB.
By the way:
open msconfig using search
in msconfig click on boot
next inside boot click on advanced options
In boot advanced options click on maximum memory and increase the value
then click OK. Next click apply in msconfig and then restart your pc

Why does my iMac only recognize 3GB of 4GB RAM installed?

I have an iMac 20" (Model A1224, iMac 7,1). Intel Core 2 Duo 2GHz running 10.5.8 OSX.
I removed the stock 1GB and replaced it with 2X2GB DDR2 667mhz PC2-5300 SO-DIMMS (G.Skill).
I booted up. Both memory slots show OK, but one only shows 1GB instead of 2GB. Overall, the system only recognizes 3GB. What gives? The Apple Support page for this model says that it supports 4GB (some other web sites even say it supports 6GB).
Thanks.

The likely cause is RAM that does not meet Apple's specifications. The specifications you cite are correct but many vendors sell memory that simply does not meet them. You are their quality control department, which saves them no small sum of money.
There are only two recommended vendors these days, Crucial and OWC. People have reported problems with many other brands, yet Crucial and OWC's prices are as good as any you are likely to find.
Go to Crucial and download the little app that examines your system and recommends RAM upgrade options.
Their prices are good but don't have to buy memory from them - determine what you need and buy it from Crucial or OWC / MacSales. If OWC says you can install 6 GB then you can. Crucial does not often recognize this ability so their app will probably report only a 4 GB option for your iMac.

4gb ram installed, only 2gb showing up?

I'm planning on upgrading soon as my macbook pro (13 inch mid 2010) has been running incredibly slow as of late, but just wondering why my ram is showing up as only 2gb when I have 4gb installed? It's probably just me being stupid, but I was hoping someone on here could clear this up for me.
I recently did a scan on crucial's website and it says I have 4gb, but now on the activity monitor it's showing 2gb, as well as on the 'about this mac' section, is it possible that one of the slots has come loose?

I doubt that the Crucial web site can accurately determine how much RAM you have. The, "About This Mac" System Report will be the best indicator of your RAM amount.
If you didn't buy the Mac with an optional 4 Gigs of RAM, it most likely shipped with 2 Gigs by default.
Example:

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

Windows 7 64bit 4gb RAM yet only 2.46 usable

Ive read other posts on this, but they all seemed to be people running 32bit OS's.
Ive got 4gb RAM installed, and Windows sees this. I upgraded to Windows 7 64bit and at the start it was using the full 4gb. Something has changed in the last week and it only shows as 2.46 gb usable and 4gb installed. If i disable detection in the bios and use discrete. it goes up to 2.9gb
Can anyone help me as there is 1.5gb being wasted somewhere. I run with switchable graphics set to high performance.

The T500 will for sure show 2.46GB if you're running switchable graphics and a 32-bit OS.
The key point is verifying that the system is indeed 64-bit.
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

Installed 4GB ram, but comp only reading 3GB?

I just upgraded my 2.4ghz MBP from 2 to 4GB ram (Kingston DDR2-667 2x2GB cards). The computer reads all 4GB (in the system profiler), but when I open a program like AFTER EFFECTS, it's only using 3GB.
Any ideas why or how to fix the problem? Of course I got the extra ram specifically for programs like AFTER EFFECTS and FINAL CUT, so it'd be nice to know that i'm getting my money's worth!
thanks!

The computer reads all 4GB (in the system profiler)
So you DO have 4 GB RAM installed OK.
when I open a program like AFTER EFFECTS, it's only using 3GB.
Not all your RAM is available for an application to use; your video chip, for example, uses your system RAM.

Problems with Installing 4GB RAM on mid 2007 iMac

I ordered 2 X 2GB sticks of PC2-5300 DDR2 SODIMM RAM for my Boss's mid 2007 iMac from Crucial.com. Well they arrived a few days later and today I have been trying to install them for a few hours now without any luck. I have installed new RAM about 5-6 times without any problems before on different MacBooks and iMacs. After this install I plugged back into the wall and hit the power button, the iMac made a little noise (internal noise) then nothing, just a blank screen. I thought maybe the RAM was bad so I inserted 2 other chips (we ordered 4 X 2GB to upgrade 2 iMacs) and still no luck. After making sure the iMac would boot with the old RAM (which it did), I tried installing 1 X 1GB with 1 X 2GB and it booted up perfectly. I did this with all four 2 GB RAM chips to make sure they all worked and they did. Each time I successfully booted, I went to the system profiler to make sure it recognized 3GB of RAM and it did. So my question is why is this mid 2007 Aluminum iMac not working with 4GB of RAM, but it works perfectly with 3GB? Thanks in advance, sorry for the long question.

+It seems to me that it is not just a problem with the RAM but with the imacs themselves.+
How does this make any sense when one considers that Apple successfully specified, produced, sold and delivered all three iMac (mid 2007) models with an optional 4GB of RAM pre-installed?
In addition, Apple has, without issue, sold large quantities of that same RAM online and over-the-counter for customer upgrades. Much of all that 2GB, and the latest 4GB RAM, as usual, has been manufactured by Micron, the publicly owned U.S. manufacturing company parent of the Crucial direct sales division. The same type of RAM was also being provided to Apple by other manufacturers.
I received my two orders of upgrade RAM from Micron/Crucial even before I had purchased my 24-inch iMac, and it's worked great ever since I installed it. I also installed the second half of that order into my current MacBook, purchased a month after the iMac, and it's also been working great ever since. These are certainly superior Apple products.
Obviously there has been a change in RAM manufacturing design at Micron, probably due to their change-over to the costly, challenging high-tech 50nm and 40nm manufacturing technologies, and it is nothing more than Micron's problem.
Message was edited by: myhighway

G62 6GB (4GB x 1+2GB x 1) RAM instalation issue

Hello Sir
I have HP G62 with 3GB (2GB x 1, 1GB x 1) RAM factory istalled. Now i wanted to upgrade it to 6GB (2GB orignil and 4GB new DDR3 purchased RAM), installed it. But laptop is not starting just on power on fan sound heared and gone and its gone again and again.
what should i do please suggest me
Thanks

Hello Suhaib,
Here are few things you can do.
Interchange the RAM slots could resolve the issue.
else check the RAM by doing this: Insert the 2GB RAM and check if the computer turns ON fine. Then insert the 4GB RAM and check if it turns ON fine. Do this on both slots to check if the slots are working too..
Another way is by running the Memory test from computer's UEFI.
Cheers..
Wish you luck,
Karthik
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--Please mark the post that solves your problem as "Accepted Solution"

Satellite L300-145 - BSOD appears if I install 4GB RAM

Hi all
i have this Satellite L300-145 PSLB0E-03601LPT and I want to install 4GB RAM but when I install 4GB on SO boot BSOD appears.
I try to change with other brand memorys with equal modules, I try to install Windows 7 64bit, Linux 9.10 64bit and it the same things. I try also to update BIOS but it the same.
I think it is Remap memory feature on bios but doesnt have that option.
So what i need to do?
My laptop have now 3GB
CPU: T2390 1,86Ghz 533Mhz
CHIPSET: GM965
RAM:2GB DDR2 533Mhz
HDD:Hitachi 200GB
After upgrade
CPU: T8300 2.4Ghz 800Mhz
RAM: 2GB DDR2 667Mhz
HDD: Seagate 7200.4 250GB
I realy need 4GB

Im sorry i confuse with other chipset.
But if i can get 800Mhz and 3GB 667Mhz Dualchannel its very good.
But i dont understand the BSOD.
This is my test:
1) I install 3 difrent 2GB modules and i get the same BSOD on boot OS, but i can enter on bios and i can see on memory info. 4096MB.
2) I try to instal 3GB and laptop boot well but i find one problem if i put Bank0:1GB and Bank1:2GB laptop boot ok but if i swap i get the same error BSOD.
I think one slot cannot address 2048MB of size.
If i install only 2GB on that slot i get the same BSOD.
I have 3 tips of ram
2GB 533Mhz 667Mhz and 800Mhz with difrent brands and chips.
why i this BSOD only appears on boot OS and i can enter on bios without a problem?
Sry for my poor english
Best regards

Satellite Pro A200 - Shows only 3GB instead 4GB RAM

Hi,
2 years ago I got a Satellite Pro A200 as a business notebook and it runs with XP SP2, later with SP3. With 2 GB it shows 2 GB of memory in Windows - and I know it has a Radeon 7500 with 256MB of individual graphic memory, and it has no shared memory.
I upgraded it to 4 GB, but Windows shows exactly 3 GB. BIOS shows 4 GB and the ATI system monitor shows 4 GB. I know that 4 GB is not possible in XP 32 bit, only on Windows 2003 R2 32 bit or Vista - but on desktop systems I have seen values between 3.3 and 3.7 GB.
So where is the memory? It looks like a bug - the memory chips have both 2 GB I have verified this. Because it is a company notebook I can't just upgrade to XP 64 bit :-(
In the BIOS are no options - first I thought it's the graphic card, but mine has independant graphics with own memory so the computer comes up with 2048 MB or 4096 after the upgrade.
Shared memory would show about 1900 MB of RAM to the OS like my private EEEpc.

> I upgraded it to 4 GB, but Windows shows exactly 3 GB. BIOS shows 4 GB and the ATI system monitor shows 4 GB. I know that 4 GB is not possible in XP 32 bit, only on Windows 2003 R2 32 bit or Vista - but on desktop systems I have seen values between 3.3 and 3.7 GB.
First of all 32bit OS (no matter if its XP, Win 2003 R2, Vista or Win 7) will not recognize 4GB RAM but only 3.2GB (and not 3.7GB)
I have no idea where you looked for available RAM but you should run DXDIAG in RUN.
Then you should get some details and also the available RAM.
Secondly the graphic card supports Local cache (256MB) and HyperMemory.
HyperMemory of the graphic card depends on the available main RAM memory.
For example the unit supports 1024MB RAM (1GB) then the hyper memory would be 256MB this part of RAM would be shared with graphic card!
This is the reason why the only 3GB are shown...
PS: regarding such comments and a tip:
> hey man please think before you answer.
This is a community and all people here try to help each other so be always thankful for all kind of answers

8GB of RAM Installed, only 4GB detected/used by BIOS/Windows 7 (with P67A-GD55)

Let me start off by saying that I'm not very good with computers. At all. I know a little bit about them, but I am by no means an expert. That said, I have 8GB of RAM installed on my motherboard, spread out across 4 sticks. However, upon looking at my BIOS and my Windows Resource Monitor, it declares that I only have 4GB of RAM installed and usable. This is what I know so far:
- This issue has been prevalent as long as I've had my computer, and by extension my motherboard and my RAM sticks, so this issue isn't recent.
- I do have a 64bit version of Windows 7. I've checked and double-checked, and I'm 99.5% positive that it is.
- Speccy, a 3rd party program designed for checking system specs, declares that I do, in fact, have 8GB installed.
- I don't think that the RAM is bad because the BIOS still does pick up on different statistics of the RAM that are in the slots; it just fails to register the actual fact that they're there.
System Specs:
OS: Windows 7 64bit SP1
CPU: Intel Core i5 2500K @ 3.30GHz
RAM: Patriot PSD32G133K 4x2GB DDR3 @ 498MHz
Motherboard: MSI P67A-GD55 P67 LGA 1155
HDD: 977GB SAMSUNG SAMSUNG HD103SJ ATA Device (SATA)
Optical Drive: LG DVDRAM GH24NS50 ATA Device
GPU: AMD Radeon HD 6870 1GB VRAM
PSU: Cooler Master 750 Watt
BIOS Version: E7681IMS V1.5
Now this is where it gets interesting: My motherboard has 4 DIMM slots for the RAM, and the motherboard (I assume by default) works in dual-channel mode. This means that DIMM 1 and 3 work together and so do DIMM 2 and 4, which most of you probably understand. However, filling up all 4 slots only gives me half the RAM. So I remove the RAM from slots 2 and 4, and it results in all 4GB of RAM being detected. Then, I add in each other RAM stick one at a time, and it fails to register both. So I remove the RAM from slots 1 and 3, and keep the RAM from slots 2 and 4, and it ends up in all 4GB being registered.
I feel like the answer should be directly in front of me, but from endless Google searches and posts on other forums, I have ended up at a dead end. I'm completely clueless, so I could really use some help.
Any and all help would be appreciated.
Also, if this is the wrong forum for this, feel free to move it wherever.

Quote from: Jack on 28-August-11, 01:11:56
What is your current UEFI/BIOS Version?
The usual cause of such problems is (apart from bad memory slots or a defect of the processor's memory controller) a contact problem between the boards CPU Socket contact pins and the CPU's contact pads. Broke or bent pins are one explanation, in other instances a heatsink that is fastened to tight can also cause such issues.
I'll have the BIOS version up in a moment, but I'll see about diagnosing if one of those problems might just be what is my problem. Any tips on doing that?
Also, BIOS version is up in the OP now.

786GTM-E45 4GB Ram Installed 3GB reported by XP

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