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ASUS motherboard with single and dual memory

Forum Motherboards & Memory : Asus - ASUS motherboard with single and dual memory

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nonparity   03-12-2009 at 07:10:28 AM

I have a ASUS V2-P5G43 barebones unit which allows for 8GB of memory.

It currently has 4GB of dual memory installed but I would like to upgrade it to 8GB. (it is running cent os 64, so the OS can handle the memory)

My question is can it support 4GB of dual memory and 4GB of single memory(which going from the manual appears to be the case but I am not sure) or does it need 8GB of single memory?

Thanks for hopefully pointing me in the right direction.

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o1die   03-12-2009 at 03:03:11 PM
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2 identical sticks of the same size and speed ram will work in dual channel mode. As long as each pair is the same, there's no difference between dual or single channel memory in performance. The board chipset and position of the sticks determines whether you're running in single or dual channel mode.

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nonparity   03-12-2009 at 09:54:37 PM
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It has space for 4 sticks

currently I have 2 identical dual channel memory. which is why i would need to go single mode for the other 2(as it does not support 4 sticks of dual) but my question is can it support 2 sticks dual and 2 sticks single or does it need 4 sticks single?

thanks!

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GhislainG   03-12-2009 at 11:19:26 PM
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How can you go single channel if you install 2 identical modules in the same channel? By default they should run in dual channel, unless the system can run dual only for one channel and not for the other one (which I've never seen before, but it's possible).

Reply to GhislainG
nonparity   03-12-2009 at 11:30:39 PM
- 0 +

i was too tired i guess

i mixed dual channel with dual sided

it can only support 2 dual sided sticks anything more than two needs to be single sided

but cant find 2gb single sided sticks anywhere

Reply to nonparity
GhislainG   03-13-2009 at 01:08:50 AM
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You are correct; 2 GB single sided modules don't exist. According to the manual (section 2.5.1), you can use 2 DS, 2 SS plus one DS or SS or 4 SS modules. You can't use 2 DS plus 2 SS. I would only buy modules listed on the QVL as it seems somewhat picky (several modules/combinations are marked as Fail on the QVL).

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