Is my DualChannel running and working at top performance?

Hello,


PC SPECIFICATIONS:
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PC Model :: Dell Dimension E521 (stock MOBO)
MotherBoard ID w/ date (generated from EVEREST) ::  12/09/2006-C51MCP51-6A61HM39C-00
OS :: Win XP Home
CPU :: AMD Athlon(tm) 64 X2 Dual Core Processor 5200+
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http://www.experts-exchange.com/Hardware/Desktops/PCs/Q_23822954.html

This is an extension of a topic I started a few weeks ago which was closed, but I was hoping to confirm something in relation to my current setup now.

I just basically want to confirm:

1) I am running in dual channel.

2) I am maximizing the dual channel with the memory I am using.

I've already determined my dual is activated by 2 memory chips in slots 1 & 2. But I have 4 slots.

Below depicts my current setup the lines represent my memory slots:

Slot #4> [ --------------------------------------------------------- ]   -->  1GB  Kingston PC2-5300 333Mhz
Slot #3> [ --------------------------------------------------------- ]   -->  1GB  Kingston PC2-5300 333Mhz

Slot #2> [ --------------------------------------------------------- ]   -->  256MB  Nanya PC2-4300 266Mhz
Slot #1> [ --------------------------------------------------------- ]   -->  256MB  Nanya PC2-4300 266Mhz

What I need to know if I would be better off removing 3 & 4??
w3developingAsked:
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MarkConnect With a Mentor Commented:
and yes you are running in dual channel, and you are maximizing the available ram, but not the top speed of the 1GB modules at PC2 5300 speeds. For that you would have to remove the nanya ram and put the kingston ram in the 1,2, slots.
You lose the 512MB of ram but increase bus speed.
For my money I'd keep it just the way you have it as the decrease in bus speed is not that much but 12MB of ram can come in very handy with some programs.
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w3developingAuthor Commented:
I mean removing 1 & 2!!
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MarkConnect With a Mentor Commented:
According to Dell docs for memory population on the e521, DIMM connectors must be populated in numerical order beginning with connectors DIMM_1 and DIMM_2, then connectors DIMM_3 and DIMM_4.
http://support.dell.com/support/edocs/systems/dimE521/en/SM_EN/parts.htm#wp1184464
A drop in speed would come from using slower speed ram in the first two slots.
This will drop the speed of the 3,4,slots to the PC2-4300 bus speed. Not because they are in these slots but because they are slower speed.
They increase in ram though is beneficial when all ram is used
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MarkCommented:
Meant 512MB of ram in my last statement.
Thanks for the points.
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