Fermat1
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4 gig memory installed only 3 showing up on vista ultimate x64
As stated, running vista ultimate x64 with 4 GB installed. They show up in BIOS, but no on system control panel or task manager. I've seen several answers about this, but always they point out that it applies to 32 bit vista and usually mention that 64 bit vista is capable.
Is there some bcdedit.exe command I need to change for it to show up?
Thanks
Is there some bcdedit.exe command I need to change for it to show up?
Thanks
ASKER
I can definitely confirm that it is 64 bit Vista.
The motherboard has a maximum of 4 GB, and 4 GB does show up in BIOS.
How would I check if my video card is using the shared memory? When I had 2 GB installed, all 2 GB showed up. Why would a full GB of memory be used for devices anyway just because I jumped to 4 GB?
The motherboard has a maximum of 4 GB, and 4 GB does show up in BIOS.
How would I check if my video card is using the shared memory? When I had 2 GB installed, all 2 GB showed up. Why would a full GB of memory be used for devices anyway just because I jumped to 4 GB?
sounds like a limitation of your motherboard's chipset to me.
could you find out what chipset you have and post back?
could you find out what chipset you have and post back?
If memory was being used by your graphics card then it would use memory regardless of wether 2Gb or 4Gb was installed so its not that.
Given that you are sure that it is indeed the 64bit version that only leaves the Motherboard. Check with the Motherboard manufacturers web site - and see if a BIOS update is available.
Given that you are sure that it is indeed the 64bit version that only leaves the Motherboard. Check with the Motherboard manufacturers web site - and see if a BIOS update is available.
As stated above , there are more issues to contend with than the 64bit vs 32bit question, when trying to get all 4GB of memory seen by the operating system.
Here is an interesting link from HP that mentions the chipset limitation issue even when running a 64bit OS.
It states-->"In contrast, some 64-bit capable systems use 32-bit chipsets, limiting physical memory addressing to the 4 GB limit even though Windows XP Professional x64 Edition is installed. The HP xw4200 is such a system (like all systems based on the Intel 925 Express chipset) and it continues to typically allocate between 3 and 3.4 GB of RAM."<--
http://64.233.167.104/search?q=cache:_v_DyyNSiewJ:h20331.www2.hp.com/Hpsub/downloads/RAM%2520Allocation%2520w-WinXP_HP%2520MWP%2520x64%252003Nov05.doc+chipset+memory+address+limit&hl=en&ct=clnk&cd=3&gl=ca&client=firefox-a
Here is an interesting link from HP that mentions the chipset limitation issue even when running a 64bit OS.
It states-->"In contrast, some 64-bit capable systems use 32-bit chipsets, limiting physical memory addressing to the 4 GB limit even though Windows XP Professional x64 Edition is installed. The HP xw4200 is such a system (like all systems based on the Intel 925 Express chipset) and it continues to typically allocate between 3 and 3.4 GB of RAM."<--
http://64.233.167.104/search?q=cache:_v_DyyNSiewJ:h20331.www2.hp.com/Hpsub/downloads/RAM%2520Allocation%2520w-WinXP_HP%2520MWP%2520x64%252003Nov05.doc+chipset+memory+address+limit&hl=en&ct=clnk&cd=3&gl=ca&client=firefox-a
ASKER
Ok, sounds like my motherboard is the issue. I'm not exactly sure how to find out what it is. It is a Dell, so I guess I'll give them a call.
I'll post back with the details. Thanks.
I'll post back with the details. Thanks.
ASKER
SIW reports the following on my motherboard:
Property Value
Manufacturer Dell Inc.
Model 0RY007
Version ÿÿÿ
Serial Number ..CN7360479402OT.
CPU Intel Core 2 Duo
Cpu Socket LGA775 [Socket 775]
Processor Upgrade ZIF Socket
System Slots 2 PCI
Memory Summary
Location System board or motherboard
Maximum Capacity 4096 MBytes
Memory Slots 4
Error Correction None
Name Physical Memory Array
Use System memory
Warning! Accuracy of DMI data cannot be guaranteed
SOLUTION
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ASKER CERTIFIED SOLUTION
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ASKER
Sparkmaker, CPUz reports my mainboard chipset as "P35/G33/G31". Why does it list three? Reading the details, both G33 and P35 list 1333 MHz FSB, where G31 lists only 1066 MHz. CPUz reports 1333 MHz FSB, so does this mean I have either G33 or P35?
If I have G33 or P35, then 8 GB is addressable and YGregersen's article shouldn't apply, right?
If I have G33 or P35, then 8 GB is addressable and YGregersen's article shouldn't apply, right?
SOLUTION
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For Windows Vista to use all 4 GB of memory on a computer that has 4 GB of memory installed, the computer must meet the following requirements:
" The chipset must support at least 8 GB of address space. Chipsets that have this capability include the following:
" Intel 975X
" Intel P965
" Intel 955X on Socket 775
" Chipsets that support AMD processors that use socket F, socket 940, socket 939, or socket AM2. These chipsets include any AMD socket and CPU combination in which the memory controller resides in the CPU.
" The CPU must support the x64 instruction set. The AMD64 CPU and the Intel EM64T CPU support this instruction set.
" The BIOS must support the memory remapping feature. The memory remapping feature allows for the segment of system memory that was previously overwritten by the Peripheral Component Interconnect (PCI) configuration space to be remapped above the 4 GB address line. This feature must be enabled in the BIOS configuration utility on the computer. View your computer product documentation for instructions that explain how to enable this feature. Many consumer-oriented computers may not support the memory remapping feature. No standard terminology is used in documentation or in BIOS configuration utilities for this feature. Therefore, you may have to read the descriptions of the various BIOS configuration settings that are available to determine whether any of the settings enable the memory remapping feature.
" An x64 (64-bit) version of Windows Vista must be used.
" The chipset must support at least 8 GB of address space. Chipsets that have this capability include the following:
" Intel 975X
" Intel P965
" Intel 955X on Socket 775
" Chipsets that support AMD processors that use socket F, socket 940, socket 939, or socket AM2. These chipsets include any AMD socket and CPU combination in which the memory controller resides in the CPU.
" The CPU must support the x64 instruction set. The AMD64 CPU and the Intel EM64T CPU support this instruction set.
" The BIOS must support the memory remapping feature. The memory remapping feature allows for the segment of system memory that was previously overwritten by the Peripheral Component Interconnect (PCI) configuration space to be remapped above the 4 GB address line. This feature must be enabled in the BIOS configuration utility on the computer. View your computer product documentation for instructions that explain how to enable this feature. Many consumer-oriented computers may not support the memory remapping feature. No standard terminology is used in documentation or in BIOS configuration utilities for this feature. Therefore, you may have to read the descriptions of the various BIOS configuration settings that are available to determine whether any of the settings enable the memory remapping feature.
" An x64 (64-bit) version of Windows Vista must be used.
Which Dell model is this. Do you have a service tag number we can use to check for BIOS updates and such?
ASKER
It is a dell inspiron 530. I just downloaded and installed the latest BIOS from dell, 1.0.5. I see no remapping feature. Hopefully it will appear someday for me. :)
I think I understand the issue now. Thanks.
I think I understand the issue now. Thanks.
Click the Windows blob, (start button) type "SYSTEM" in the Start Search box, and click SYSTEM in the Programs list.
Look under System Type - it will confirm 32 or 64bit OS.
For a 64-bit version operating system: 64-bit Operating
If it is 64 bit then, it could be that its a limitation of the motherboard - check the manual
or
Is your video card using some of the RAM as shared memory ?