How to setup dual channel memory?

fizk

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Dec 28, 2006
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I've an emachines T5048 machine with Intel D102GGC2 motherboard. I ran cpuz program to get info about motherboard and memory. System came with a 512MB DDR2 PC-4200 memory module. I bought a new Kingston 512MB DDR2 PC-4200 and added to the second slot. BIOS and windows now recognizes the memory as 1024MB.

However, BIOS says memory is single channel. Intel description of this motherboard says it supports dual channel memory. I've two identical memory modules (size and speed), why is it not in dual channel?

Link to motherboard
http://www.intel.com/products/motherboard/D102GGC2/index.htm

Link to memory I bought
http://www.newegg.com/product/product.asp?item=N82E16820144165

Second question. If the motherboard does not support dual channel, is it ok to replace the 512MB with 1GB memory module?
 

Mondoman

Splendid
...Intel description of this motherboard says it supports dual channel memory. ...
Could you post a link to where it says it supports dual channel operation? I couldn't find anything about dual channel mode in the link you posted.
Second question. If the motherboard does not support dual channel, is it ok to replace the 512MB with 1GB memory module?
Yes.
 

fizk

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From intel
http://www.intel.com/design/motherbd/gc2/d102ggc2_mlp.pdf
Page 5, System memory:Speed: Single/Dual Channel, DDR2, 400


googling on this motherboard comes up with dual-channel description, for e.g

http://www.shopping.com/xPF-Intel-MATX-MBD-P4-S775-PCIE-VID-DDR2-SATA-FET

newegg.com
http://www.newegg.com/Product/Product.asp?Item=N82E16813121031

"Two DDR2 SDRAM RAM slots support installation of up to 2 GB of DDR2 533/400 memory in dual channel mode for lively throughput."

Althought some customer review says this is not dual channel. I guess intel is lying here?
 

PixelPimP

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I have an a7n8x that didn't want to run dual with diff brands of ram.
Updated bios one day and it started working.Maybe a bios update?
 

Mondoman

Splendid
From intel
http://www.intel.com/design/motherbd/gc2/d102ggc2_mlp.pdf
Page 5, System memory:Speed: Single/Dual Channel, DDR2, 400
It's not clear to me whether that means "single or dual" channel, or "single and dual" channel. The ATI chipset has both single channel and dual channel versions. Usually, manufacturers list dual channel mode in their board descriptions, since it's a feature for marketing; the fact that Intel doesn't seem to do so for this board suggests to me that it doesn't support dual channel mode. E-machines may also have modified the BIOS or bought a special cheaper version of the MB w/o dual-channel support, so I would check with e-machines to find out for sure. It wouldn't hurt to contact Intel.


googling on this motherboard comes up with dual-channel description, for e.g

http://www.shopping.com/xPF-Intel-MATX-MBD-P4-S775-PCIE-VID-DDR2-SATA-FET
This link doesn't say anything about dual or single channel mode that I can find.

newegg.com
http://www.newegg.com/Product/Product.asp?Item=N82E16813121031

"Two DDR2 SDRAM RAM slots support installation of up to 2 GB of DDR2 533/400 memory in dual channel mode for lively throughput."
That's written by Newegg, not Intel. Newegg is sometimes wrong in their descriptions & specs, so I usually take them with a grain of salt. Like I said above, I'd try contacting emachines and/or Intel.
 

fizk

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I called emachines, the rep I talked to is not sure if it supports dual channel or not. It doesn't say anything about single or dual channel support in their system.

I guess I will have to call Intel, may be they will ask for serial number etc....time to dig in to the motherboard again...

I guess I will leave the machine with
1x512MB DDR2 PC-4200 and
1x1GB DDR2 PC-4200