Difficulties running two identical dual channel kits

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miketmansoor

Commendable
Oct 11, 2017
32
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My setup:
MSI z97 gaming 5
4690k
asus gtx 770
2x4gb gskill 1600 cl9
850w psu

currently have the cpu at 4.4ghz 1.27 core voltage

So I recently picked up two identical dual channel 2x4gb gskill ripjaw x 1600 cl9 kits and attempted to run them together. I would be able to boot and things would be running fairly smooth. Generally if I left the computer idle in windows overnight it would blue screen and restart by the time I woke up. Would also experience some random bsods during use. I have seen that a lot of people have issues filling all 4 dimm slots and/or running two identical dual channel kits. I've tested the memory and it passes with no errors in memtest. If I run just one kit there are no issues. Also tried with a quad channel kit gskill ripjaws z 2133 cl9 and had exact same issue

Any help would be greatly appreciated

 
Solution
B
There is always risk running multiple kits or buying single sticks.

Kit A is tested to work together, and Kit B is tested to work together but there is always the chance that A and B wont play nice together.
Even though they are the same model they can in fact be completely different chips under those heat spreaders.

Sometimes this works fine, sometimes it has occasional instabilities, and sometimes it is constant fail or even no boot.

Unfortunately you are going to have to buy 2x8gb kit if you want to run 16gb of ram
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JoeMomma

JoeMomma

Distinguished
Nov 17, 2010
860
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It should work, but sometimes you get bad luck.

1) Try switching RAM slots. New / Old / New / Old or Old / New/ Old / New is the normal way, but try Old / Old / New / New also.
2) Exchange the new RAM and better luck next time.
 
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boosted1g

Titan
Jun 12, 2013
14,846
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There is always risk running multiple kits or buying single sticks.

Kit A is tested to work together, and Kit B is tested to work together but there is always the chance that A and B wont play nice together.
Even though they are the same model they can in fact be completely different chips under those heat spreaders.

Sometimes this works fine, sometimes it has occasional instabilities, and sometimes it is constant fail or even no boot.

Unfortunately you are going to have to buy 2x8gb kit if you want to run 16gb of ram
 
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Solution
M

miketmansoor

Commendable
Oct 11, 2017
32
0
1,530
I haven't switched the order yet as you suggested however I recently tried using a quad channel kit to use as dual channel and had exact same issue. Too much stress on the imc?



 
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Calvin7

Titan
Feb 19, 2013
11,725
334
76,490
Once you add another load of memory, the existing memory may no longer be able to operate at its rated specifications due to the added stress on the memory controller. So using identical kits is not recommended and no memory manufacturer would guarantee such combinations to work or how they would run if you get them working.

Workarounds for getting multiple kits to work include:
Lower Dram Frequency
Relax Dram Timings
Increase DRAM Voltage
 
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