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03/16/2010 (10:11 pm)

My computer is reading my 1066 ddr2 ram as 667 ram ?

Filed under: nappedeptrole.com edit
  • I just finished building my new computer. I installed 4 gb of ddr2 1066 dual channel ram and in my boot screen it is showing i am running 4 gb of 667 ram.I know my motherboard only supports 1066 on one channel.would this make the ram drop in frequency or is the ram not supported by my cpu Would it be best to buy 2x2gb of 1066 ram and run it in my dual channel that supports it or will it be best to run 4x1gb of 800 ram in two sets of dual channel.

    amd 64x2 6400+
    asus m3n hdhdmi motherboard
    ocz 1066 4x1gb


  • Your CPU AMD 64 X2 6400+ does not support 1066DDR2 Memory.Instead it supports PC2 6400(DDR2-800), PC2 5300(DDR2-667), PC2 4200(DDR2-533), PC2 3200(DDR2-400) .DDR2 1066 is supported by AM2+ CPU only

    http://www.amd.com/us-en/Processors/Prod...

    Your M/B supports Dual-Channel DDR2 -1066/800/667.

    It is best to run 4x1gb of 800 ram in two sets of dual channel. For 32bit Windows O.S. less then 4GB will be identified by the O.S.





  • First, 2x2GB is best. Using two sticks with the same size memory allows you to run in dual-channel. Using four sticks just increases the load on the signal lines and usually results in having to settle for higher latencies or lower transfer speeds.

    Your 1066 DDR2 RAM is probably defaulting to a "safe" setting that doesn't require an increased voltage. This is usually done to ensure that the machine can boot after the CMOS settings are cleared or reset. I recommend you do the following:

    1) Burn the memtest86+ ISO onto a CD and boot from it. Make sure your memory is coming up in dual channel mode and note the timings. Note the speed (the GB/s value for your RAM). Let it run for a half an hour or so just to make sure your RAM isn't defective.

    2) Set your BIOS settings to the voltages and timings that are recommended for your RAM. Reboot into memtest86+. Make sure the speeds and timings are what you expect. Note the speed, it should be faster. Let it run for several hours to make sure your RAM is stable.

    3) If things worked at stop 2, you can stop here. You are getting your advertised speeds, and you know things are stable. If things didn't work at step 2, back off on the timings or speeds or increase the voltage (CAREFULLY!).

    4) If you want to overclock, and things worked at step 2, you can start trying higher speeds or lower latencies.

    5) When you're done and happy, leave memtest86+ running for at least two full cycles of all the tests, usually several hours. Do not even boot into your OS if your memory is not 100% stable.

    Good luck.







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