Dual Channel 2x4GB + 2x8GB

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Czanien

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Dec 8, 2014
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Hey, I have got 2x4GB and 2x8GB Corsair Vengeance 1600MHz RAM and I am wondering how I should set-up the channels.
Any of you have any idea?
Do I need to change any timings and stuff? or just install them and change a setting or something?

PS: I have been looking for an answer but have not seen any.
Thanks in advance.
//Czanien
 
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Darkfalz79

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May 7, 2015
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Not true, it should work. Each kit should go in its own match slots as when using ram in a dual channel config, they must be of the same size to work optimally. When mixing, it will use the loosest of the two timings if they differ - seems to work better than it used to.
 
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Czanien

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Dec 8, 2014
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So, either I put them like 8-4-8-4 from the CPU? Or I exchange the 2x4 kit to a 2x8?
 
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Czanien

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Dec 8, 2014
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The thing is that I had the 2x4gb when I built the computer last year and bought a pair of 2x8gb a few months ago bc the 8GB was not close to enough.

Shouldn't it work if I buy another pair of 2x8gb? Or do a need a 4-pack?
 
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Darkfalz79

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May 7, 2015
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Dual channel kits are designed to run in a dual channel config. Most boards offer TWO pairs of dual channels. Odds are it would work if they are the same speed and close to the same timings. 16 GB is overkill too, 8 GB is the sweetspot and 12 GB, although an "odd" number, would give you that little bit of extra room.

So yes, the two 4 GB sticks in one pair of coloured slots, the two 2 GB sticks in the other.
 
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Czanien

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Dec 8, 2014
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Okay. I quite often host servers of different kinds (modded minecraft) and also play some games (like modded Minecraft) that require quite a lot of RAM. I had 8 GB in total for a year, and it was not enough at all. That's why I bought another pair, but 2x8GB instead of 2x4GB



No, sorry, I didn't mean 2x2GB by "4-pack", I meant a 4x8GB instead of 2x4GB + 2x8GB so I can make use of quad-channel instead of dual-channel
 
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Tradesman1

Tradesman1

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Jun 5, 2013
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While there are two slots per channel - there aren't two sets, the two slots work together to in each to form CHANNEL A and CHANNEL B, the slots in a channel aren't independent. All DRAM installed runs the same timings, voltage, etc.....and mixing sets is 50/50 at best, it's a crapshoot if the sticks will play nice
 
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Darkfalz79

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May 7, 2015
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Timings need to be tighter in the same channel as reads are leveraged across both slots. This is not true across the other channel. If you can get roughly the same timings and same memory speed (same brand/line would help), using the timings of the more relaxed module, your success should be much higher than 50% - probably more like 95%.
 
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Tradesman1

Tradesman1

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Jun 5, 2013
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_____________________

ALL the DRAM runs at the same settings, in both channels and both slots of each channel and there is a lot more to it than timings, you aren't taking into account different memory ICs, binning, SPD settings, etc - even the solder and PCB used in a stick affects how they run
 
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