Problem With Bus in Dual Channel

[Gabana]

Hi
I have a 865PE Neo2 MSI Main.
I put 2 ddr2 ram in 1,3slots - 256 ddr2 400 ( dual channel )
then i bought another 2 rams like those but Difference Timing .
now with 4 rams my performance is very bad and the Frecuencyof rams is decreased - 200 mhz to 159 mhz ...
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whats the problem ?
is the timing the problem ?

 

[Kholonar]

It is alas the problem with memory controllers, you have memory that is rtunning at different speeds and the memory controller in your processor is having problems with it. This is why when you get RAM it is best to get matched pairs that run at the same speed and have the same latencies.

There is a partial solution but it's not guaranteed to work. Try going into your bios and set the timings of your RAM modules to the worst (highest) timings of the selection of RAM modules. Now set the divider of the RAM to 1:1 and set the command rate to 2T. If everything still doesn't work, start loosening the latencies of the RAM.

It's gonna be a bit ugly looking but you won't suffer too much of a performance drop.