memory speed is only 400 MHz instead of 1066

Discussion in 'General Hardware' started by belveder, Feb 6, 2009.

  1. belveder

    belveder OSNN Senior Addict

    Adelaide, Australia
    I have 4 sticks of (2 dual lots) of Kingston Hyper X (KHX8500D2/1GN) that are supposed to be running at 1066 MHz but according to HWinfo, Everest Ultimate edition & CPUz they are only running at 400.0 MHz

    Can someone please tell me how to fix this or what is going, I am totally stumped. I'm not into overclocking but I would like to have the memory running at least close to what they are supposed to be doing

    Any help appreciated

    My system

    Intel Core 2 Duo E6850 CPU
    2 x 2 GB Kits Kingston Hyper memory 1066MHz
    MSI P35 Platinum Combo
    Creative X-Fi Titanium Pro Soundcard
    Geforce GTX 285 Video card
    Thermaltake 1000W Toughpower PSU
    WD 250GB SataII HD
    4 x WD 500GB SATAII HD
    2 X Samsung 1TB HD
    Compro T750 HDTV Dual Tuner PCI Card
    Thermaltake Bigwater 745 water cooling
    Samsung 226BW 22" monitor
    Samsung Syncmaster 913 19" monitor
  2. ElementalDragon

    ElementalDragon The One and Only

    Lehighton, PA
    Well.... 400mhz, but it's DDR, so 800mhz. only way i can imagine getting it up to speed is browsing the BIOS settings and seeing what they're set to.
  3. Admiral Michael

    Admiral Michael Michaelsoft Systems CEO Folding Team

    Well it's actually 800MHz. It's DDR (double data rate) so take the speed and double it. Also 1066MHz RAM isn't a standard so you would need to overclock your computer to get those speeds.
  4. trukkmann

    trukkmann OSNN Addict

    400Mhz is the front side bus speed (FSB), and like ElementalDragon said 400 x 2 (DDR) = 800Mhz on the RAM, which is as high as the JEDEC standard goes for DDR2, if you want 1066 you'll have to overclock it. Boot into BIOS and look at your CPU:RAM divider, it is probably running 1:1. You want the 1:1.3 divider if you have it (1.3 x 400 = 520 x 2 = 1040Mhz). 1:1.2 would be 960Mhz, and 1:1.4 would be 1120Mhz.

    Alternatively, you could push the FSB of the CPU which will also push up the RAM's speed. (If you're running 400Mhz FSB with the 9x multiplier you are already overclocked to 3.6Ghz.) If you can get 430Mhz FSB out of the CPU you could use the 1:1.2 divider and get 1032 Mhz on the RAM. If you're afraid of pushing the CPU that far you can always drop the CPU's multi in combination with a higher FSB and stay near stock clock speed on the CPU. Hope something here helps! :)
  5. belveder

    belveder OSNN Senior Addict

    Adelaide, Australia
    ok thanks for that