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CMX4GX3M2A1600C9 question


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I acquired this memory CMX4GX3M2A1600C9 XMS3 DDR3 4GB (2X2GB) PC3-12800 (1600MHZ) DUAL CHANNEL KIT. It was supposed to work at 1600 MhZ. Ι changed the xmp profile in bios from auto to profile 1 but memtest freezes and sometimes i get blue screens. My bios is asrock p55 xtreme with a i5 cpu attached. Do i need to overclock the cpu as well to make xmp work?What can I do. At 1333 mHz memory works fine.Thank you in advance
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Asrock says that due to i5-750 CPU cannot support DDR3-1600 DRAM frequency by the memory controller inside of CPU , the XMP profile is useless for i5-750 CPU.Also that I can overclock my DRAM to DDR3-1600 frequency by "Memory EZ OC" in BIOS setting . Due to they didn't have the exactly DRAM module like mine , they have tested two Corsair DD3-1600 DRAM module (TR3X6G1600C7) on P55 Extreme .There was no problem on their system .


They also suggested:

1.Setting the DRAM voltage to lower or higher level and try again.

2.Test another DRAM module on P55 Extreme and try again.


I did choose memory oc but system freezes after 10 minutes of running memtest. Any suggestion about setting the DRAM voltage?

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