How do I know what the Ram Capacity is on my PC if I have 4 slots but have 2gig sticks currently per slot

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I have the following Mother Board From Intel
Property      Value
Manufacturer      Intel Corporation
Model      DQ965CO
Version      AAD46478-503
Serial Number      AZCO7480013F
North Bridge      Intel Q965 Revision C1
South Bridge      Intel 82801H0 (ICH8D0) Revision C1
CPU      Intel(R) Pentium(R) 4 CPU 3.20GHz
Cpu Socket      Socket 775 LGA
System Slots      4 PCI
Memory Summary      
Maximum Capacity      8192 MBytes
Memory Slots      4
Error Correction      None
Warning!      Accuracy of DMI data cannot be guaranteed

I have posted the memory information as well. Does the red highlighted area around the memory capacity mean I have the maximum amount.? What it says I have for memory. Just need to be certain?
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According to this, the max memory depends on the speed.
4 GB if DDR2 800; 8 GB if DDR2 667 or DDR2 533

It looks as if you have the max supported.
Try this out for your board:

The key answer though is: "8 GB maximum total system memory using DDR2 667 or DDR2 533 DIMMs; 4 GB  maximum total system memory using DDR2 800 DIMMs."
There's the whole Windows issue here too.  Windows 7 32-Bit only supports fully up to 4 GB 64 Bit goes on to different number based on your edition as follows.

While the maximum RAM limit for 32-bit Windows 7 editions is 4GB,  when it comes to the 64-bit editions, the amount of memory that the OS  can address depends on which edition you are running.

Starter: 8GB
Home Basic: 8GB
Home Premium: 16GB
Professional: 192GB
Enterprise: 192GB
Ultimate: 192GB

RUA Volunteer2?Tableau Trainer & Consultant Sales Exec.


So it sounds like since I have Window 7 Ultimate 32-bit and 8 gb of ram in place I must only be using 4 gig. In that case since these are 4 x 2gig sticks then should I just take them out and put them in my other 64 bit machine as long as they fit.

Another question for me is if I have 4 slots do the 2 gig sticks I have work just fine in the 2 slots or will I need to keep all for in only actually using 1 gig of the 2 gig sticks......hope that makes sense. ?

Win32 actually recognizes about 3.5 GB of RAM. Your system may report 3.25 - 3.33, depending how much is used by your motherboard systems. It may be even less if you are using integrated graphics.
As long as they fit... ;-)
Two sticks in 4 slots should be ok. Motherboards are better now, but they can still be picky. You typically should install them in the lowest-numbered slots, for example, DIMM0 and DIMM1. How the slots are labeled and if this works depends on the motherboard. A BIOS update may add options.
Another alternative is to install 64-bit.
Gary CaseRetired
Most Valuable Expert 2013
Top Expert 2009
Not only will two modules work just fine; but the memory system will be more reliable if you only install two modules instead of all four. The reason is the electrical loading on the address and data buses ==> which is much higher with four modules installed. This causes deformation of the waveforms, which makes the system less stable. That's the reason the BIOS slows down the memory when you install four 2GB modules -- and why you can only install four 2GB modules if you're running at lower speeds.

However ... don't do as suggested above and install them in the lower-numbered slots. Install one in each channel, so the memory will operate in dual channel mode. For your board, that means you should install a module in the first and third slots.
@garycase: "Install one in each channel, so the memory will operate in dual channel mode."
I agree with this. I think our misunderstanding is our (both yours and mine) assumptions about how the manufacturer numbers the slots.

I said "lowest-numbered slots, for example, DIMM0 and DIMM1". Please note the "for example". I was basing my assumption on a board I have had numbered this way:



In this case, we are both correct.

You said "first and third slots." Is that from the processor or from the bottom of the board?

The safe thing to do to help our Asker is to look at his motherboard documentation, specifically on page 38 or on page 20. Again, I was correct in that both slots the Asker should use are, again, the "lowest-numbered" slots.

To be clear, ruavol2, you should install 2 sticks only in the blue slots. They are both labeled DIMM0, one for Channel A and one for Channel B. They *are* the first and third slots from the processor.

My earlier recommendation still stands: If possible, I would leave the 8 GB where it is and install 64-bit Windows.

Sorry for the confusion,
RUA Volunteer2?Tableau Trainer & Consultant Sales Exec.


I got it. I am covered now. Thank you. Good stuff.

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