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 Post subject: Dual channel memory on an Abit AN7 (an old subject revived)
PostPosted: Thu Jan 24, 2013 12:30 pm 
8086
8086

Joined: Thu Jan 24, 2013 12:19 pm
Posts: 2
I realize this thread has been dead since 2004, however I am working on a project with my old Abit AN7 motherboard.

I understand the dual channel options, but I was wondering if there is any known benefit of running all 3 slots in dual mode, as compared to 2 slots in dual mode, for a 2GB configuration. Would having more chips somehow add efficiency for bank 1?

For example:

Slot 1 = 512mb
Slot 2 = 512mb
Slot 3 = 1gb

VS.

Slot 1 = 1gb
Slot 2 = <empty>
Slot 3 = 1gb

Thank you :)


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 Post subject: Re: Dual channel memory on an Abit AN7 (an old subject reviv
PostPosted: Thu Jan 24, 2013 6:14 pm 
Contributing Writer
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Joined: Wed Jun 23, 2004 8:09 pm
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No, and if anything, using less sticks means there's one less part to potentially fail.


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 Post subject: Re: Dual channel memory on an Abit AN7 (an old subject reviv
PostPosted: Thu Jan 24, 2013 7:24 pm 
Smithfield
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Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5025
You can't run 3 slots in dual channel. If the motherboard is happy with the memory, it'll run all three modules in single channel mode.


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 Post subject: Re: Dual channel memory on an Abit AN7 (an old subject reviv
PostPosted: Thu Jan 24, 2013 8:46 pm 
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LatiosXT wrote:
You can't run 3 slots in dual channel. If the motherboard is happy with the memory, it'll run all three modules in single channel mode.


That's not necessarily true of older motherboards based on the nForce2 chipset, in which case it's not about the number of sticks, but how the memory banks are separated.

For example, if slots 1 and 2 are part of memory bank A and slot 3 is memory bank B, you could install 512MB sticks in slots 1 and 2 and a 1GB stick in slot 3, effectively filling each memory bank (not slot) with 1GB of RAM, for 2GB total in dual-channel mode.

There used to be an Abit FAQ page that confirmed the AN7 cooperated this way. It read:

"You will see the string 'Dual Channel enabled' on the POST screen while RAM modules installed on DIMM 2&3, DIMM 1&3 or all three DIMM slots. If you installed only one memory module on either one slot or two memory modules on DIMM 1&2, you will see the string 'Single Channel enabled' on the POST screen. Please refer to the following ABIT website for the memory modules we have tested on AN7."

The page is long dead now, but used to appear here: http://fae.abit.com.tw/eng/faq/qa/2003/2003112105.htm


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 Post subject: Re: Dual channel memory on an Abit AN7 (an old subject reviv
PostPosted: Fri Jan 25, 2013 10:01 am 
8086
8086

Joined: Thu Jan 24, 2013 12:19 pm
Posts: 2
Thanks for help! It's fun to go back and look at old toys now and then.


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