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Different RAM sticks in dual channels


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#1 xTeChN0

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Posted 08 June 2017 - 10:43 AM

Hello!

 

I have been doing some research about using different sets of RAM sticks in dual channels on the same motherboard (My MB: MSI MS-7758). Reading on the forums I could find a lot of different answers whether it will work or not so I decided to ask here.

 

I have installed two 4GB RAM sticks in dual channel: Kingston DDR3 SDRAM UDIMM 9905471-011.A00LF, Memory Speed: 666.7 MHz (DDR3-1333 / PC3-10600).

 

I was looking to add or change those with two of these 4GB sticks: DDR3 Patriot 4GB 1600MHz CL11.

 

So my question is will adding Patriot RAM sticks work and will MB clock them just on a lower speed or it will not work and it is better to use Patriot sticks instead of Kingston sticks? And will this lower speed actually make a big, noticeable difference outside of benchmarks? 

 
 


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#2 unopie

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Posted 08 June 2017 - 11:37 AM

Yes those two sticks that you are planning to install will work fine. Since your motherboard supports the two speeds. Maybe I am missing your questions, but here is a chart of the speed of ram it supports for your MB:

 

f305d4719d728476bb5a66fef52fdc97.png



#3 Drillingmachine

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Posted 08 June 2017 - 12:18 PM

So my question is will adding Patriot RAM sticks work and will MB clock them just on a lower speed or it will not work and it is better to use Patriot sticks instead of Kingston sticks? And will this lower speed actually make a big, noticeable difference outside of benchmarks?


Should work and motherboard probably adjusts timings via SPD and so probably without extra tweaking memory clock will be 1333 MHz. Difference between 1333 and 1600 is very small outside memory intensive applications (quite small on those).

Edited by Drillingmachine, 08 June 2017 - 12:18 PM.


#4 xTeChN0

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Posted 08 June 2017 - 12:23 PM

Ok thanks! That was what I was looking for.

 

But I got another question now. Since slowest are Kingston sticks with clock speed 1333 MHz then why is Speccy showing me this: 8.00GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)" and HWinfo64 tells me that my RAM speed is 666,7 MHz if Kingston memory is clocked at 1333 MHz? To clarify, right now I have only two 4GB Kingston sticks installed.



#5 Drillingmachine

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Posted 08 June 2017 - 12:45 PM

667*2=1333

#6 xTeChN0

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Posted 08 June 2017 - 12:47 PM

Oh ok :D . Did not think of doing some simple math :D Thanks!






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