Memory Timings

Hello guys,

When i build my pc i ordered 2x 2GB ram sticks from OCZ that were clocked at 1066MHZ.
And they should have been running at 533Mhz on the pc with the timing 5-5-5-18.
My motherboard is a Asus M4A78-EM and my CPU is A AMD X4 955 3.2Ghz.
A couple of days ago i realized it was running at 400Mhz instead of the 533Mhz and also in Single Channel instead of Dual Channel which is stated in Cpu-Z check the screenshot here.
Okay.. i loaded up the bios and tried some settings but all of them are giving memory errors when running memtest86.
Can you guys help me with this issue?



PS: The model of the memory is "OCZ2P1066LV4GK"
3 answers Last reply
More about memory timings
  1. Make sure you installed the memory in the yellow slots.

    I'm not currently running AMD but a check of the board specs revealed this info under the memory entry....

    4 x DIMM, Max. 16 GB, DDR2 1200(O.C.)/1066*/800/667 ECC,Non-ECC,Un-buffered Memory
    Dual Channel memory architecture
    *Due to AMD CPU limitation, DDR2 1200/1066 is supported by AM2+/AM3 CPU for one DIMM per channel only.
    *We recommend that you install the DDR2 1200 memory modules on the yellow slots for better performance.
    *Due to OS limitation, when installing total memory of 4GB capacity or more, Windows® 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended.
    *Refer to or user manual for Memory QVL (Qualify Vendor List)

    Seems to indicate to me that there is some sort of CPU limitation in play.

    Hopefully someone who has one will chime in with their thoughts.
  2. Thanks LoneWolf_53. I had them in two different banks. That's why they weren't working. When i putted them in the yellow ones the bios recognized them and setted up the correct timings for the memory automatically.

  3. You're quite welcome.

    Glad you got it sorted out. :)
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