will the different third module broke the dual channel?

Jul 11, 2018
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Im thinking to update my ram, i want to make a dual channel witth 2 modules of the same model ddr3 at 1600, thats ok, My question is, i have 4 slot for ram modules, wahts happen if i put also another module of 4 gb at 1333(is which i have right now) i a third slot, will that broke the dual channel of the anothers two or will make the pc more slower??
 

Karadjgne

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No. All ram works at the slowest speed. So currently you have a 1600 in A2, a 1600 in B2 and a 1333 in A1 or B1 will result is dual channel 1600 running at 1333 and a single channel 1333 at 1333. If you add a 1600, it run at 1600 single channel, and the dual channel will run 1600.

If it works.

The only way to 'break' the dual channel is by putting both sticks side-by-side in 1-2 or 3-4 instead of 1-3 or 2-4.
 
Jul 19, 2018
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The motherboard will slow down the new 1600 modules to 1333. You may have to overclock the 3rd module, but then it won't be running as a dual channel. IMHO I would say if you don't need the extra 4GB, just use 2 1600 modules. It's less likely to have issues or force you to mess with overclocking or having to match timing and latency
 
Jul 11, 2018
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i have a p7h55 asus motherboard, and i ordered a intel x3440 cpu,
I had a idea that maybe the 4 slots works on pairs(in the motherboard guide appear as a1,a2---b1,b2) and i will have a pair working at 1600 and anothe module woking alone at 1333. So it will slower the other two?
Maybe better shell the 1333 and buy 2 news that will work together at 1600, and if a need more buy another one at 1600 later.
 

Karadjgne

Titan
Ambassador
No. All ram works at the slowest speed. So currently you have a 1600 in A2, a 1600 in B2 and a 1333 in A1 or B1 will result is dual channel 1600 running at 1333 and a single channel 1333 at 1333. If you add a 1600, it run at 1600 single channel, and the dual channel will run 1600.

If it works.

The only way to 'break' the dual channel is by putting both sticks side-by-side in 1-2 or 3-4 instead of 1-3 or 2-4.
 

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