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2 Bronze
2 Bronze
962042

Optiplex GX620 memory limitation

My GX620 currently has two 1GB memory modules but as I now have Windows7 64-bit, what is the maximum memory I can install?

The upgrade section says 4GB (with the warning that a 32-bit OS will see less than this) but since a 64-bit OS can see more than 4GB (my Studio XPS has 6GB) why can't I fill the slots with 2GB modules?

Replies (28)
2 Bronze
2 Bronze
2091

It has been my experience that the GX620 will only use up to PC2-5300 RAM. 

That runs at 667 MHz. 

Some say they have gotten it to work with PC@-6400, 800MHz RAM, but I have never been able to get one to work with it.

6 Thallium
2091

Some say they have gotten it to work with PC@-6400, 800MHz RAM, but I have never been able to get one to work with it.

Mine is quite happy with 2x2gb of PC6400, but it won't boot Windows with 4x2gb of the same.

10 Diamond
2091

Older versions of the Bios don't like it.  Use BIOS A11.

BUFFERED, ECC, REGISTERED, RAM does not work.

Ram goes into slots 1  then 3   white tabs.  Then Slots 2 then 4  Black Tabs.

1 dimm works.  2 dimms work   memory should be matched pairs.

Mixing speeds and vendors is always an issue.  aka toshiba with hynix and micron etc.

No point at all in using 4x 2 gig dimms because it does not allow you to use it.

 


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10 Diamond
2091

[quote user="Thunderbill"]Some say they have gotten it to work with PC@-6400, 800MHz RAM, but I have never been able to get one to work with it.

Mine is quite happy with 2x2gb of PC6400, but it won't boot Windows with 4x2gb of the same.

[/quote]

The other really annoying thing is that in the BIOS Setup it will show all 8 gigs of ram and it will POST and boot with 32 bit XP.

The minute you install  an X64 os however windows crashes to the black screen of death.

 


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2 Bronze
2 Bronze
2091

Hi Osprey4

Just signed up this forum. May I ask you questions about my Optiplex GX620?

It's a single core I think  (Intel) R (Celeron) R  CPU 3.06ghz

3.06ghz RAM and I wan to install a 320g HDD SATA that Dell Disc in Austin sold to me this week

It is presently loaded with WinXP and I want to install Win7 on the new hard drive. Any particular

Win 7 installation I should use and is all this compatible?   Appreciate your input.

2 Bronze
2 Bronze
2091

The booting statement is incorrect.

I have a optiplex gx620 mini tower that has win 7 home premium 64 bit and it boots fine.

10 Diamond
2091

If you put 8 gigs of ram in it will not boot with a 64 bit OS.  The statement is not incorrect.

The bios will actually show 8 gigs installed.

With 32 bit XP the system will boot but again have 3.5 gigs period end.

This is a chipset limitation.

The system steals ram for the onboard INTEL Video.  The frame buffer steals regardless of whether or not there is a PCI video card or not being used.

If you add 8 Gigs its the same issue even with 64 bit OS.

They have recently updated the Microsoft catalog for AD198X codec to say

Description: This driver was provided by Analog Devices for support of SoundMAX Integrated Digital Audio
Architecture: X86
Classification: Drivers
Supported products: Windows 7 , Windows 8 , Windows 8.1 Drivers
Supported languages: all
Analog devices seems to no longer make or support the product.
 
MAX CPU Is pentium D 960 with BIOS A11 and Copper heat pipe performance heatsink in the GX620 TOWER.

If you update the Bios to A11 and the CPU to a Pentium D 900 Series the 620 is no longer stranded.

So the new requirement is 8.1 needs the processor to support CMPXCHG16b, PrefetchW, and LAHF/SAHF.

Coreinfo will tell you.

http://technet.microsoft.com/en-us/sysinternals/cc835722.aspx

Users have the option of obtaining a 32-bit version of Windows 8 and updating to 32 bit windows 8.1

 

I have seen inexpensive 900 Series Pentium D's on Ebay and Amazon

SL9QQ seems to be the max for a 5150

Intel Cpu Pentium D 945 3.4Ghz Fsb800Mhz 2Mbx2 Lga775 Dual Core Tray

Intel - P-D 3.4GHz/4M/800 Dual Core CPU SL9QQ 

6 used from $12.00

INTEL PENTIUM D 945 SL9QQ 3.4GHZ 4MB CACHE 800MHZ FSB DESKTOP CPU PROCESSOR

Bios Updated to A11,  4 Gigs of Ram installed still Registers 3.50

Pentium D 820 was Replaced with Pentium D 915.  DELL HH807 Motherboard Bios A11.  Copper Heatsink  305W Tower.

I added a Radeon 6670 Video card.  All drivers are native to windows clean install.  I added directshow legacy feature and installed directx june 2010.  After windows updates everything works as expected.

Description Supported OS Download
Analog Devices ADI 198x Integrated Audio, v.5.12.2.7010, A02 R14549.EXE Windows Vista 64-bit Download
Analog Devices ADI 198x Integrated Audio, v.5.12.01.7010, A25  R145551.EXE Windows Vista 32-bit Download

R145551.EXE         32 BIT

R145149.EXE          64 BIT

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Dimension Dimension 2400
Dimension Dimension 3000
Dimension Dimension 1100/B110
OptiPlex 170L
OptiPlex GX270 / GX270N
OptiPlex GX280
OptiPlex GX520
OptiPlex GX620
OptiPlex SX270 / SX270N
OptiPlex SX280
Precision 360 / 360N
Precision 370
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Precision 670

 


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2 Bronze
2 Bronze
2091

Hello. 

The GX620 will boot and properly utilize a 64-bit operating system, so there must have something else going on to cause that issue.  Try using the clean command from within the windows utility "DISKPART" to completely clear your boot disk (DISKPART is accessible from a windows 7 and above supervisor command prompt).  If using windows XP then you can try the disk management snap in or FDISK and remove all partitions.  When you are certain that your boot disk is completely blank place it back to the normal configuration and reinstall the operating system that you are having a problem with.  If you still have the problem then try a completely different disk (also try disk cable just to be sure).  Also the memory that you are using may not be compatible with 64-bit operating system, though that may be a long shot.   I would try installing to a completely blank disk drive.


With regard to memory, you can install 8gb and it will show up in the BIOS and even show up in the 64-bit OS, but it will not be usable.  So even with a 64 bit OS the maximum amount of memory available to the OS is 4gb, even with BIOS A11.  Its a hardware issue with the chipset and is unresolveable, believe me I've tried and if I can't get it to work it probably will never work...  fyi...   Best regards.

6 Thallium
2091

With regard to memory, you can install 8gb and it will show up in the BIOS and even show up in the 64-bit OS, but it will not be usable.

Mine wouldn't boot Windows (8 x64) with 8gb installed.

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