Ubuntu don't see all 3 gigabyte memory

[xeeon]

Hi there
On my computer was 2 gigabyte memory and I bought still 1 gigabyte memory. In the Ubuntu show only 2.75 instead 3 GB.
I have old computer. P-IV but in the manual\book for my motherboard say that can use to 4 gigabyte of memory.
I have 2 questions.
Why in the Ubuntu don't show all 3 GB memory?
If I buy still 1 gigabyte of memory, it\she will show 4 GB in the Linux or not?

[ptkobe]

Strange! Where did you get that number (2.75G)?
Did you run command free?

[Mad Professor]

are you running a 32 bit O/S?

You need a 64 Bit O/S to break the 3GB limit.

Are you sure that you don't have an onboard video chipset using shared memory?

If you have discrete graphics card, you can disable shared memory in the bios.

[xeeon]

ptkobe

Strange! Where did you get that number (2.75G)?

System -- Administration -- System Monitor

Did you run command free?

What is it?

Mad Professor

are you running a 32 bit O/S?

Of course. I said that I have P-IV. All P-IV has only x86 architecture

Are you sure that you don't have an onboard video chipset using shared memory?
If you have discrete graphics card, you can disable shared memory in the bios.

OK, When I pull out 1 memory(I have 3 memory on 1 GB each) show exactly 2 gigabyte. If would worked video chipset show 1.75 gb. Right?

[coopstah13]

perhaps the module is bad then, try running memtest, you should be able to install it with synaptic if it isn't already

[techieMoe]

Of course. I said that I have P-IV. All P-IV has only x86 architecture

That's not entirely correct.

The New 64-Bit Pentium 4 Processor | Hardware Secrets
Intel's 64-bit Pentium 4 Reviewed by ExtremeTech - Prescott Gets Beefier - CPUs, Boards & Components by ExtremeTech
Intel® Pentium® 4 Processor Product Information
Intel's 64-Bit Pentium 4s Hit The Streets - Technology News by ExtremeTech

Certain later model Pentium 4 chips supported EM64T, which was Intel's brand name for X86_64. The original question is a valid one.

[ptkobe]

Hi, xeeon

System -- Administration -- System Monitor

free is a command line to "Display amount of free and used memory in the system"
Just open a terminal and type
$ free

I guess you'll have a similar answer, but please check it

[Mad Professor]

ptkobe
Of course. I said that I have P-IV. All P-IV has only x86 architecture

Sorry, roman numerals didn't register in my mind. Just use to seeing P4, or Pentium 4.

ptkobe
OK, When I pull out 1 memory(I have 3 memory on 1 GB each) show exactly 2 gigabyte. If would worked video chipset show 1.75 gb. Right?

Sounds to me you're being limited by a 32 Bit O/S, not much you can do, unless you get a 64Bit Kernel.

Windows has this problem as well, sometimes they can see 3.1GB, sometimes they can only see 2.5GB. It depends on how the system reports it to the O/S and how the O/S Calculates the total.

[xeeon]

ptkobe
I'm used free. It show 2770 MB
In the memtest show 2815MB
coopstah13
I'm used memtest. All module is not damage
techieMoe
Thanks, I don't knew(that has P-IV 64bit)