Can I do 2 dual channel on a 4 DIMM motherboard?

Solution
Install the memory in pairs and you get dual channel no worries. It's best to use identical memory.
If you're only installing 2 DIMMs (sticks of RAM), make sure you read the manual and put the DIMMs in the matching slots. You probably use either the two dark blue slots or the two black slots, but check the MB manual to be sure.
If you use all four slots, just use identical RAM and you'll get dual channel.

When you say, "can I do a 2 dual channel" - do you mean 2 lots of 2x4GB kits (i.e. 4 DIMMs, 16GB memory)?
Just to be clear, there's no performance gain going from 2 to 4 DIMMs. If you actually want 16GB Ram (which is overkill unless you're doing serious video/photo editing or other productivity tasks), you're best to get 2x8...
Install the memory in pairs and you get dual channel no worries. It's best to use identical memory.
If you're only installing 2 DIMMs (sticks of RAM), make sure you read the manual and put the DIMMs in the matching slots. You probably use either the two dark blue slots or the two black slots, but check the MB manual to be sure.
If you use all four slots, just use identical RAM and you'll get dual channel.

When you say, "can I do a 2 dual channel" - do you mean 2 lots of 2x4GB kits (i.e. 4 DIMMs, 16GB memory)?
Just to be clear, there's no performance gain going from 2 to 4 DIMMs. If you actually want 16GB Ram (which is overkill unless you're doing serious video/photo editing or other productivity tasks), you're best to get 2x8 and leave 2 slots free in case you need them later.
 
Solution

James Convento

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Mar 29, 2013
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Well the question just got out of curiosity.
you right about having 2 dual channel on the 4 DIMMs.
and my primary thing on the computer is hardcore gaming.
(its not like im thinking im gonna have increase in fps though.)
its just it have 4 DIMM slot and support only dual channel.
is there really no increase in its performance when doing that?
 
Most consumer desktop MBs have 4 slots and dual channel. The standard thing is to populate two to begin with. Really-really there is no performance gain using all 4 slots over 2.
You have to go to uber-expensive X79 motherboards to get quad channel RAM and the difference to gaming is next to zero, nowhere near cost-effective.
If you're building a gaming rig, 8GB is plenty to start with. You're on a B75MB though which is pretty entry level. Have you already bought it? If you haven't bought things yet, it might be worth posting your build here. There are wise folks here who can help you get the most out of your money.
 

James Convento

Honorable
Mar 29, 2013
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Hehehe, like I said it was just out of the curiosity .
Wrong link. this is: http://www.asus.com/Motherboards/P8B75M_LE/#overview
 
Yeah, it'll be fine. They were initially released to target business, but it has everything you need for a single GPU build. You can't Overclock your CPU, and you only have one SATA3 port. For a good (but not crazy-high end) gaming PC, that's all fine.