Cant run ram at rated speeds

i have 16gb of ripjaws X 2133 that i can only run @ 800 mhz DDR3 1600

rig:
asus crosshair formula V
amd 8120
radeon 7870
1tb seagate
1250 OCZ psu

my nb is at 2200mhz and ram voltge is at 1.5... my EFI bios sais its running at 16gb 2133 but SIW and CPUZ sais other wise...

http://imageshack.us/photo/my-images/688/siw.png/
http://imageshack.us/photo/my-images/193/cpuzq.png/

:pfff: HELP!
5 answers Last reply
More about cant rated speeds
  1. CPUZ shows the frequency at 800mhz because that's what it's supposed to show. DDR stands for Double Data Rate so a 1600mhz RAM stick will run at 800mhz but it sends information twice per ''cycle'' effectively running at 1600mhz.
    Same goes for all other DDR speeds. Example: DDR 800mhz will show as 400mhz in CPUZ; 1066 will show at 533 and so on
  2. yea but i wanna run at 2133 ?so it should show 1066 ? am i missing something here ? lol
  3. You want a RAM stick rated at 1600 to run at 2133? I don't think that would be possible or recommended but you could try overclocking
  4. my ram stick is rated for 2133
  5. Hi techjay,

    You have it slightly overclocked, I assume with the CPU Host Frequency raised to achieve your current 830MHz. You are correct, DDR3-2133 should show ~1066MHz in that CPU-Z DRAM Frequency.

    To overclock and achieve DDR3-2133 with that CPU and motherboard, you must manually set DRAM Frequency, timings, and voltage. In addition, you will need to raise CPU-NB Voltage to stabilize the high frequency. The CPU-NB Voltage is the memory controller voltage, and it will be unstable as you go upwards of DDR3-1866 since AMD states the CPU can only support 2 modules of DDR3-1866. By raising the voltage and finding the sufficient amount, you can force stability.

    If you would like to read more details, you can search for the "AMD FX CPU overclocking" guides on the web, or you can visit the Official G.Skill Forum. There are many users that have already done this, so you should be able to find tons of information.

    http://www.gskill.us/forum/

    Thank you
    GSKILL SUPPORT



    techjay said:
    i have 16gb of ripjaws X 2133 that i can only run @ 800 mhz DDR3 1600

    rig:
    asus crosshair formula V
    amd 8120
    radeon 7870
    1tb seagate
    1250 OCZ psu

    my nb is at 2200mhz and ram voltge is at 1.5... my EFI bios sais its running at 16gb 2133 but SIW and CPUZ sais other wise...

    http://imageshack.us/photo/my-images/688/siw.png/
    http://imageshack.us/photo/my-images/193/cpuzq.png/

    :pfff: HELP!
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