Windows 7 64bit 4gb of Ram but only 2 can be recognized

[ChrisGreece52]

I installed today windos 7 64 bit (i had windows 7 32bit) because i wanted to take advantage of all my ram!!!
But when i went at system properties it said Ram : 2GB
My Pc Specs :
Windows 7 64bit
2 X 2 GB ram (KVR1333D3N9K2/4G)
Ati Radeon HD 4650
Intel Core I5 CPU 750 @ 2.67GHZ
If you need anything else please let me know.
And Please help me .

[M. András]

put them into the another slot, if the bios dont see them motherboard or ram

[Stonent]

Also, how many slots does the system have for RAM?  If the number is divisible by 3 you may need matched triplets for it to read anything other than just one module.

[Psi]

As far as i know you only need multiple chips (dual/triple) to get dual/triple channel memory mode.
(where it does a kind of RAID stripe on the ram to double/triple the speed.)
Any motherboard should be happy with less chips, it will just fall back to single/dual channel mode.

Check that your ram actually is 2x 2GB. Maybe they supplied you with 2x 1GB by mistake.

The only other things i can think of are
- Did you set any maxmemory parameters in your boot.ini previously?
- Does your motherboard have onboard video enabled, it maybe using up system memory.
- Do you have any ramdrives setup
- Are you running windows inside a virtual environment of any sort

[ChrisGreece52]

put them into the another slot, if the bios dont see them motherboard or ram

Will do and reply

[ChrisGreece52]

Also, how many slots does the system have for RAM?  If the number is divisible by 3 you may need matched triplets for it to read anything other than just one module.

My motherboard has 4 ram slots so i can get pairs of 2 and not 3

[ChrisGreece52]

As far as i know you only need multiple chips (dual/triple) to get dual/triple channel memory mode.
(where it does a kind of RAID stripe on the ram to double/triple the speed.)
Any motherboard should be happy with less chips, it will just fall back to single/dual channel mode.

Check that your ram actually is 2x 2GB. Maybe they supplied you with 2x 1GB by mistake.

The only other things i can think of are
- Did you set any maxmemory parameters in your boot.ini previously?
- Does your motherboard have onboard video enabled, it maybe using up system memory.
- Do you have any ramdrives setup
- Are you running windows inside a virtual environment of any sort

Ok thanks for your reply but i am a bit of a noob and the only thing i got is the 2X 1GB and no they are 2X2GB
also i did not got the first thing you said
and no my motherboard has an PCI slot for my video card is this is what you mean
Also i think that there is no problem with the ram drives because if it was one then i could not use the pc because they are the same model.
no  i use windows as my main OS and not as a virtual one.

[jpb]

The first thing is to check that the BIOS can see the RAM. It should be displayed, very briefly, when the pc is booting. Better is to go into the BIOS setup which usually is done by holding down a key during boot up, normally F2 or Del.

This will tell you if the RAM is physically there for the computer.

A useful program for reporting on hardware is hwinfo, this is free.

I don't think it is a Windows problem, I have Windows 7 64bit and 24GB of RAM.

If the RAM is not visible to the BIOS try taking out one at a time to see if it is the RAM or if it is the RAM slots/motherboard that is causing the trouble.

Be careful to earth yourself prior to handling RAM as they are static sensitive - best to use an ESD strap but you'll probably be ok just ensuring you earth yourself on say an earthed metal case prior to opening the computer and handling the RAM. (Don't earth yourself if there is any danger of you touching a live wire or a large charged capacitor in the power supply of course.)

[ddavidebor]

I'm curious, what is your need for 24gb of ram?

[GEuser]

Mentioning your motherboard would have helped

Anyway most newer mb's have ram slots that are not 1-2-3-4 as you look at them , they can be 1-3 2-4 so the ram has to be in 1-2 or 3-4 look in the manual for the mb , also in the bios make sure they are set right , try that's!

[free_electron]

I'm curious, what is your need for 24gb of ram?

Angry birds. That, or edlin ...

[M. András]

I'm curious, what is your need for 24gb of ram?

haha i managed to fill up 32gb of it what i have

[jpb]

I'm curious, what is your need for 24gb of ram?

I was actually thinking of doubling it to 48GB of RAM as it only costs £160 for a further 24GB and I've been limited by the 24GB.

I have a dual 2.93GHz Xeon Dell precision workstation with 8 cores in total which can run 16 threads. The software I run (an automated theorem prover) typically needs up to 3GB per thread so if I run 8 threads using all the cores but not hyperthreading I need 24GB but the OS uses some of it so I'm constrained. I also used all the cores and RAM when I was doing work for my PhD on machine learning - this involved running the machine for days on end, at a few hundred watts my study got very hot when I left the door shut just from the hot air being blown out!

Memory for the Xeons I have needs to be fitted in 3s per chip to make full use of the memory bandwidth, so for two processor chips to get maximum speed takes 6 RAM modules and I have 6x4GB. Unfortunately if I expand I'll need to go to more than one rank (3x8GB on one chip and 6x4GB on the other) which slows the clock rate down for some reason - the latest 5600 series Xeons don't have this limitation.

Admittedly, most of the time I don't need anything like that amount of memory but for things that can be done in parallel it is very useful.

[ddavidebor]

Thank god for provide people that use computational power for something different than videogames

[IanB]

I installed today windos 7 64 bit (i had windows 7 32bit) because i wanted to take advantage of all my ram!!!
But when i went at system properties it said Ram : 2GB

Presumably the memory was already installed in the computer and you just updated the OS?

First thing to do is go into the BIOS setup and check what is reported there. If the BIOS doesn't show the memory then something is wrong.

Was the memory showing up when you had Windows 7 32 bit installed? Because the BIOS would still have seen it then, and (I think) Windows would still have reported 4 GB--it just can't use all of the 4 GB.

Are you really sure you actually have 4 GB installed? It would be unusual for a PC to be supplied with 32 bit Windows and 4 GB of memory.

If you have some doubts you could open the case and check that the memory of fully seated in the correct memory slots. Usually the slots are paired and you should put the memory cards in the right pairs of slots. Some machines may have the slots colour coded to indicate the corresponding pairs.

[ChrisGreece52]

I'm curious, what is your need for 24gb of ram?

I am sorry but you did not understand me . I have 4GB of ram (Total) but windows (or bios) recognize only 2 GB.

[ChrisGreece52]

Mentioning your motherboard would have helped

Anyway most newer mb's have ram slots that are not 1-2-3-4 as you look at them , they can be 1-3 2-4 so the ram has to be in 1-2 or 3-4 look in the manual for the mb , also in the bios make sure they are set right , try that's!

As for this i am sorry my motherboard is a Gigabyte one ... thats all i can tell i will search for the manual later and my motherboard is exaclty as you described is not 1-2-3-4 but 1-3-2-4 and the Ram cards being used are 3-4

[ChrisGreece52]

I'm curious, what is your need for 24gb of ram?

I was actually thinking of doubling it to 48GB of RAM as it only costs £160 for a further 24GB and I've been limited by the 24GB.

I have a dual 2.93GHz Xeon Dell precision workstation with 8 cores in total which can run 16 threads. The software I run (an automated theorem prover) typically needs up to 3GB per thread so if I run 8 threads using all the cores but not hyperthreading I need 24GB but the OS uses some of it so I'm constrained. I also used all the cores and RAM when I was doing work for my PhD on machine learning - this involved running the machine for days on end, at a few hundred watts my study got very hot when I left the door shut just from the hot air being blown out!

Memory for the Xeons I have needs to be fitted in 3s per chip to make full use of the memory bandwidth, so for two processor chips to get maximum speed takes 6 RAM modules and I have 6x4GB. Unfortunately if I expand I'll need to go to more than one rank (3x8GB on one chip and 6x4GB on the other) which slows the clock rate down for some reason - the latest 5600 series Xeons don't have this limitation.

Admittedly, most of the time I don't need anything like that amount of memory but for things that can be done in parallel it is very useful.

LOL have you seen my pc specs I am happy it could run NFS Most Wanted (the 2013 version) even in window mode 800X600

[ChrisGreece52]

I installed today windos 7 64 bit (i had windows 7 32bit) because i wanted to take advantage of all my ram!!!
But when i went at system properties it said Ram : 2GB

Presumably the memory was already installed in the computer and you just updated the OS?

First thing to do is go into the BIOS setup and check what is reported there. If the BIOS doesn't show the memory then something is wrong.

Was the memory showing up when you had Windows 7 32 bit installed? Because the BIOS would still have seen it then, and (I think) Windows would still have reported 4 GB--it just can't use all of the 4 GB.

Are you really sure you actually have 4 GB installed? It would be unusual for a PC to be supplied with 32 bit Windows and 4 GB of memory.

If you have some doubts you could open the case and check that the memory of fully seated in the correct memory slots. Usually the slots are paired and you should put the memory cards in the right pairs of slots. Some machines may have the slots colour coded to indicate the corresponding pairs.

1) no i had only 2 gb of ram even when i had the 32 bit OS installed
2)I did this ... also i unpluged the ram cards and installed them again ... bu the thing is that i have not tried different ram slots...

[ChrisGreece52]

The first thing is to check that the BIOS can see the RAM. It should be displayed, very briefly, when the pc is booting. Better is to go into the BIOS setup which usually is done by holding down a key during boot up, normally F2 or Del.

This will tell you if the RAM is physically there for the computer.

A useful program for reporting on hardware is hwinfo, this is free.

I don't think it is a Windows problem, I have Windows 7 64bit and 24GB of RAM.

If the RAM is not visible to the BIOS try taking out one at a time to see if it is the RAM or if it is the RAM slots/motherboard that is causing the trouble.

Be careful to earth yourself prior to handling RAM as they are static sensitive - best to use an ESD strap but you'll probably be ok just ensuring you earth yourself on say an earthed metal case prior to opening the computer and handling the RAM. (Don't earth yourself if there is any danger of you touching a live wire or a large charged capacitor in the power supply of course.)

Will do now.

[ChrisGreece52]

Ok i went into the bios setup and it said that my rams is 2048 mb....
so I tried
1) remove one Ram card at a time
reuslts:
when i removed the first and the second was pluged in (in the original positions)
the buzzer on the motherboard came off.
when i removed the second one the same.
2)plug both cards into the other 2 avaiable slots
bit the buzzer came off
and also plug them one at a time to the other slots
(not the original)

[amyk]

Download and run CPU-Z, show what it says under Memory and SPD.

[ChrisGreece52]

Download and run CPU-Z, show what it says under Memory and SPD.

sorry but i dont think so .... i went into bios and saw that my ram is only 2 gb.... its not even recognizable by bios... what shall i do ?

[amyk]

...show us what it says under Memory and SPD?

This program has the ability to access the I2C bus directly and read the EEPROMs on the modules.

[M. András]

http://valid.canardpc.com/2777582 you can click on the validate button on the main windows of the program and you will get an online page like this so you dont need to type in anything at all