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I ran a DELL performance check on my computer (DELL DIMENSION 8300). Also I asked for a memorry configuration report. The result is a follows

Available Memory 60.92 %
Page File Size 3,071.1MB
Available Page File 98.47 %
Virtual Memory 6,138.4MB
Available Virtual Memory 79.63 %
CHANNEL A DIMM 0 1,024.0MB
CHANNEL B DIMM 0 512.0MB
CHANNEL A DIMM 1 1,024.0MB
CHANNEL B DIMM 1 512.0MB

Yet the BIOS reports System Memory Channel Mode SINGLE.

How can that be as the channel seems matched to me?

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  • This is something can be enable or disabled in BIOS.
    – Ramhound
    Commented Feb 7, 2014 at 19:40
  • Not a chance. The BIOS does not allow the status to be changed. It only shows it. Not editing allowed.
    – agcala
    Commented Feb 7, 2014 at 19:42
  • What does the status show? On my computer I am able to control that information which is the reason I worded my statement the way I did .
    – Ramhound
    Commented Feb 7, 2014 at 19:44
  • it shows it in BLUE. It reads STYSTEM MEMORY CHANNEL MODE SINGLE.
    – agcala
    Commented Feb 7, 2014 at 19:46
  • Try switching Channel A with Channel B.
    – Ramhound
    Commented Feb 7, 2014 at 19:48

2 Answers 2

Reset to default
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Dual channel enabled' will appear in BIOS, but ONLY if the proper RAM is installed.

Channel A = slot 1 & 3, and channel B = slot 2 & 4 ( different colors)

RAM within each channel has to be same size MB, same number of chips, and have similar timings.

So the best way to resolve it is to remove the 512MB sticks from DIMM B and try again. If you do see the option in BIOS just upgrade your memory. If you don't try again with the 1024MB in DIMM B.

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  • @ TomEus I did this: Moved the 512 Mb chips to Channel 1 and took the 1Gb chips out and tested if the memory dual channel was enabled. It was. Then put the two 1Gb chips on Channel 2 and tested again. It was dual channel. Problem solved. Thanks you all guys.
    – agcala
    Commented Feb 8, 2014 at 12:09
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Your memory needs to be balanced across channels and with the same size in matching slots for best performance and dual channel operation.

CHANNEL A DIMM 0 1,024.0MB
CHANNEL B DIMM 0 1,024.0MB
CHANNEL A DIMM 1 512.0MB
CHANNEL B DIMM 1 512.0MB

Currently A has 2GB and B 1GB which is not balanced.

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