Dual Channel Mode or Single channel after new ram stick?

Usman Sajid · Nov 22, 2014

Hey guys, i have Dell Optiplex with Dell DH609t Motherboard.
It had 2x2Gb Samsung ddr3 ram.
Today i bought 1x4gb corsair ram. Its working fine.

Now i am little worried about single and dual channel. I care about performance in gaming only.

So here is how my ram was before.

And now its.

According to this website i am running dual channel: http://www.intel.com/support/motherboards/desktop/sb/CS-011965.htm

Here is my cpu-z saying dual channel

But my friend said only previous ram is running dual channel, new is single channel?

Please tell me are all ram running dual channel?
Am i losing performance?
And does single channel effect gaming?

MeteorsRaining · Nov 22, 2014

1. Previous RAM is running dual channel, new one is running single channel.
2. Yes you are, but not in a considerable manner.
3. Nope.

Usman Sajid · Nov 22, 2014

So is this a good upgrade? as previously bf4 multiplayer lagged heavily on my core i5 and gtx 750 ti. Now its not, getting 60+fps 900p High preset

MeteorsRaining · Nov 22, 2014

Unless you're experiencing issues, it's a fine upgrade.

Usman Sajid · Nov 22, 2014

I am experiencing less stutters.

First ram usage was 3600Mb now its 5200Mb. I think stutters are gone and i got 5-10fps boost.

How to completely remove stutters? Degragging this game? Its really fragmented. And also Programs like MSI afterburner is in background which gives fps and other recordings on screen. closing that will help?

Cristi72 · Nov 22, 2014

Hello,

You can still use an 4GB and 2x2 GB in dual-channel configuration: move the 4GB DIMM into the DIMM1 slot, and the 2GB DIMM from DIMM1 to DIMM4 slot (so the Channel A will have the 4GB DIMM, while the Channel B will have the pair of 2GB DIMMs).

Usman Sajid · Nov 22, 2014

Nope, u need same size aswell for dual. i tried and dual didnt work.

MeteorsRaining · Nov 22, 2014

Run only the game with nothing in background as see if it stutters. If you don't experience frame drops, then there's nothing to worry about.

Usman Sajid · Nov 22, 2014

ok that server was causing stutters. It gave me 80ping but others had 200-300ping. Other servers are working fine with no frame drops.

Guess there isnt anything to worry about.

Cristi72 · Nov 22, 2014

Usman Sajid :

You need the same size for each channel; you installed 6 GB on the first channel and 2 GB on the second channel.

MeteorsRaining · Nov 22, 2014

Cristi72 :

DIMMs are usually A-B-A-B for four slots. And A-A forms a channel, so does B-B. He can't have a dual channel with single 4GB stick, he'll need two of them.

Cristi72 · Nov 22, 2014

MeteorsRaining :

Except he has another pair of 2 GB Dimms along with the 4 GB one, so a dual-channel configuration will look like this: Channel A: the 4GB DIMM; Channel B: 2x2GB DIMM.

Usman Sajid · Nov 22, 2014

Guys just tell me best settings i can get from ram.

And no more stutters. Its just the RivaTuner Statistics. Other things in background dont cause lag.

MeteorsRaining · Nov 22, 2014

Cristi72 said those settings in the last reply.

Usman Sajid · Nov 22, 2014

What he said is already like i have now right?

MeteorsRaining · Nov 22, 2014

Usman Sajid · Nov 22, 2014

Usman Sajid · Nov 22, 2014

so are all my rams dual channel or the previous ones only?

Cristi72 · Nov 22, 2014

Usman Sajid :

This configuration will allow you to run all the DIMMs in dual-channel (4 GB + 2x2 GB):

MeteorsRaining · Nov 23, 2014

Cristi72 :

It won't. Same colored slots form a channel, you can't mix different sizes. OP, your 2X2GB is in Dual channel and 4GB is in single channel. The only way to get that 4GB in dual channel is to get another 4GB.

Vic 40 · Nov 23, 2014

MeteorsRaining :

No wrong,Cristi is right,putting the 2x2gb in one channel and the 1x4gb in the other will give dualchannel.i think in this case Cristi could (and probably is) be right,but could be wrong,about moving the dimm looking at the next,
http://www.intel.com/support/motherboards/desktop/sb/cs-011965.htm
if the ram was working in dualchannel with 2x2gb and the 1x4gb would be placed with these as is would the 2gb need to be moved to the other channel.

@Usman Sajid ,

Download cpu-z and look under the memory tab to see whether your ram works in dualchannel.

MeteorsRaining · Nov 23, 2014

Vic 40, from that article:

Rules to enable dual-channel mode
To achieve dual-channel mode, the following conditions must be met:

Same memory size. Examples: 1 GB, 2 GB, 4 GB.
Matched DIMM configuration in each channel
Matched in symmetrical memory slots

I guess you mistook my statement. I meant, you'll have dual channel with 2GB sticks but not with 4GB stick, it'll run in single channel mode.

Vic 40 · Nov 23, 2014

Look under,

Dual-channel with three DIMMs

MeteorsRaining · Nov 23, 2014

Again:

Rules to enable dual-channel mode
To achieve dual-channel mode, the following conditions must be met:

Same memory size. Examples: 1 GB, 2 GB, 4 GB.
Matched DIMM configuration in each channel
Matched in symmetrical memory slots

Configurations that do not match the above conditions revert to single-channel mode.

And,

This mode offers higher memory throughput and is enabled when the memory capacities of both DIMM channels are equal.

And from Wikipedia's page (Multi-channel memory architecture):

Several motherboard manufacturers only support (dual channel) configurations where a "matched pair" of modules are used. A matching pair needs to match in:

Capacity (e.g. 1024 MiB). Certain Intel chipsets support different capacity chips in what they call Flex Mode: the capacity that can be matched is run in dual-channel, while the remainder runs in single-channel.

Vic 40 · Nov 23, 2014

Not going to argue about it further,i'd like to see what this says,

Vic 40 :

and what maybe moving a 2gb stick of ram will do (the one directly next to the 4gb stick).

Dual Channel Mode or Single channel after new ram stick?

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