Mixing ram with different CAS CL9 vs 10, 2/4 channel vs 3 channel and 1600 vs 1866?

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sitrec

sitrec

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Jun 26, 2014
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So I'm very inexperienced and I've been reading what ever I could find about this and everyone is saying different things so I come here, where I feel like I can trust the community to get some clarity.

I just purchaded the following kit:
Vengeance®]http://www.corsair.com/se-fi/vengeance-32gb-quad-channel-ddr3-memory-kit-cmz32gx3m4x1600c10]Vengeance® — 32GB Dual/Quad Channel DDR3 Memory Kit (CMZ32GX3M4X1600C10)[/url]

....to replace my old Dominator® GT with DHX Pro Connector and Airflow II Fan — 12GB Triple Channel DDR3 Memory Kit (CMT12GX3M6A1866C9) kit

I also replaced my old motherboard and CPU with:
Asus x79-Deluxe - which have 8 slots for DIMM
and an Intel i7-4930k

The question I have is: Can I use 4 of my old ram sticks together with the 4 new ones? I'm planning on using a RAM drive and would love to be able to use 8gb of my old RAM pushing total to 40gb instead of just leaving them in a closet to rot.

Thanks in advance!
-Tom
 
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4Ryan6
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Ironsounds

Ironsounds

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Jul 31, 2011
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Hello... Give it a try... it depends on how your MB will autoset your memory settings, try them by themselves and see what the the MB uses for auto settings, for each set... The slower settings will be the safest setting for them, if you want to use both sets together, and you may have to manually set that setting.
 
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faalin

faalin

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Feb 22, 2012
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its not a good idea to mix different sticks.

corsair dom. 1866mhz CL9 1.65volts
corsair ven. 1333 MHz CL10 1.5 volts

all your ram will run at 1333 Mhz CL10 @ 1.65volts

Looking at the manual looks like you can run 1,2,4,6,8 sticks of ram since you have a quad and triple set you can only run 6 sticks putting them in A1, B1, B2, D2, D1, & C1. I have no idea what mode you will be running in, I would think it would be single channel.
 
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notherdude

notherdude

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Jul 18, 2006
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The voltages don't match, one appears to be 1.5 and the other set is 1.65, will that stop you? I do not know. If it does perhaps the 1.5 could stand to be over-volted a bit. As a general rule, as Ironsounds already said, you can try mixing RAM but yo may need to manually set the timings to match the slower rated RAM.
 
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C

Calvin7

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Feb 19, 2013
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By mixing memory kits together, there may be compatibility issues such as unable to boot or unable to operate at rated specifications.

Corsair recommends that you match the module part number as closely as possible in order to ensure the greatest chance of compatibility. Even if you match part numbers properly, Corsair can't make guarantees as to their performance as the modules weren't tested together. Also be aware that when using two kits of memory together, you may need to reduce the speed of the memory due to motherboard chipset limitations.
 
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sitrec

sitrec

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I see, so I can't use 4 of the set of 6 sticks because it's triple channel?
 
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Ironsounds

Ironsounds

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Hello... a memory stick is a memory stick, in your case... there is no difference between a single channel, dual channel, triple channel sticks..

Your new motherboard will have Single and Dual Channel modes, so having a pair of each memory type is recomended for operation in Dual channel mode, and you need to have matching sticks in the proper MB slots.
 
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4Ryan6

4Ryan6

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Apr 14, 2002
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Hi Tom, you can do that, but personally I wouldn't!, as it may actually hurt your overall performance because with the Dominator modules not matching the others your M/B may simply default to the SPD settings of 1333mhz. Your motherboards going to automatically do what it can with the situation and supply the slot voltage to stay on the safe side. You could run the 32g 4 x 8g in the primary dual channel slots, and the 8g 4 x 2g in the dual channel secondary slots.

Again let me say that IMO it would be best to just shelve the Dominators, I have plenty of shelved memory from upgrades myself, but it is up to you, Good Luck!

 
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sitrec

sitrec

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Got it, thanks!

 
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