Corsair 6400C4 4-4-4-12 or 5-5-5-18 ?

I have Corsair TWIN2X2048-6400C4 and timming is set 5-5-5-18 1.8v. Should I change it too 4-4-4-12 2.1v or leave it.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820145034

MOBO is GA-P35-DS4

Thanks
12 answers Last reply
More about corsair 6400c4
  1. Change it to what it is rated for... in this case 800mhz 4-4-4-12 and whateva voltage.
  2. I also have a GA-M68SM-S2 (AMD) mobo and can't figure how to change in bios. Guess it can't be changed in the bios on this mobo.

    http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2640

    Is there another way to change?
  3. level101 said:
    I also have a GA-M68SM-S2 (AMD) mobo and can't figure how to change in bios. Guess it can't be changed in the bios on this mobo.

    http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2640

    Is there another way to change?


    Their is a combination of keys to press for advanced options on gigabyte motherboards... think its CTRL + F10 or something , have to check with one of the other guys...

    Quote:
    Im surprised it runs at 1.8v. My old OCZ 2.1v defaulted to 1.8v and wouldnt even load windows without getting errors. Definately set it to 2.1v, thats the recommended voltage.


    Considering that 1.8v and 5-5-5-18 is the DDR2 standard there should be no issues. All DIMM's sold should be able to run at these spec otherwise it wouldnt mean the DDR2 JEDEC specs.
  4. i have that same ram and gigabyte ga-p35-ds3l mobo

    had the same issues with the timings and voltage, it ran fine on 5-5-5-18 at just over 1.837 V

    i changed it to the advertised settings and see no difference in windows operation, since i changed thenm very soon and never had any gamrs installed by that time...over all the ram is wicked fast and is an excellent buy...it just friend my first board's bios when i changes the voltage (maybe i changed the wrong setting i duno but it would shut down and turn on every 5 seconds unless i turned the PSU off) so be carefull and read the manual before changing the voltage

    also speedfan reading does not correspond to bios reading, so i trusted the bios reading more
  5. You fried your mobo, what did you set the voltage to?
  6. If your going to OC you may want to boost the voltage but not change the timeings...the ram will do more Mhz @ the default 5.5.5.* than it will @ the 4.4.4.* settings...and a few extra million CPU cycles per sec more than take care of the extra timeing cycle.
    People have had that ram run @ C3 but not very high in Mhz.
  7. I don't think he/she is OCing. At any rate there will be very little real world performance gain anyway. Might look a little better in Sandra, that's all.
  8. level101 said:
    I also have a GA-M68SM-S2 (AMD) mobo and can't figure how to change in bios. Guess it can't be changed in the bios on this mobo.

    http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2640

    Is there another way to change?


    I'm using the same RAM module as you are, and the Mobo is ABiT iX38. Honestly I have the same problem with you, I was unable to change the setting to 4-4-4-12 on the BIOS. However I found this setting at corsair forum:

    Motherboard make and model: Asus P5WD2 or M2N32-SLI Premium/Deluxe
    Each pair is tested and packaged together using the following settings:
    AI Over Clock Tuner: Manual
    CPU External Frequency: Manually set to 200MHz
    DDR2 SDRAM Clock: Manually set to 800MHz
    PCI Express Freq: Auto
    PCI Freq: 33.33
    Performance Mode: Standard
    DRAM Timing Selectable: Manual
    SDRAM CAS Latency: 4T
    SDRAM RAS to CAS Delay (tRCD): 4T
    SDRAM Row Precharge (tRP): 4T
    SDRAM Active to Precharge Delay (tRAS): 12T
    SDRAM Write Recovery Time: 5
    Write to Precharge Delay: 15 (If it's Listed)
    Command Rate: 2T
    DDR2 SDRAM Voltage: 2.1
    Advanced voltage control
    CPU Vcore offset:_Disabled
    DDR2 Termination: 0.5x
    CPU to NB HT:____1.200V
    NB to SB HT:_____AUTO
    NB Core/PCI-E:___AUTO
    SB Core/PCI-E:___AUTO
    SB Standby core:_+1.500V

    Output driver control
    CKE:______AUTO
    CS/ODT:__1.00X
    ADD/CMD:_1.00X
    MEMCLK:__1.00X
    Chipset Core Voltage: Auto
    All other settings are motherboard defaults.
    Maximum DDR2 recommended VDIMM: 2.1 Volts

    or find it yourself at: http://www.asktheramguy.com/v3/showthread.php?t=52351

    I have not changed my setting yet due to my work, but hopefully it can help.
  9. antas said:
    PCI Express Freq: Auto
    You need to lock the PCIe frequency to 100Mhz, not auto.
  10. chookman said:
    There is a combination of keys to press for advanced options on gigabyte motherboards... think its CTRL + F10 or something , have to check with one of the other guys...


    It's CTRL + F1. :ange:
  11. Zorg said:
    You fried your mobo, what did you set the voltage to?


    i dont remember exactly now, i MAY have changed the wrong voltage setting by a noob mistake, i did +0.2 V on DDR18V option in bios i TIHNK...windows froze twice then it sais bios recovery (not in windows) and seemed to get stuck, i hit reboot, and ever since then it would turn on, for 3 seconds, fans spinning and all that, and then shut down

    i had the mobo replaced unred warranty (less than 30 days from purchase) and it solved the issue, i think the bios got corrupted when it was revocering....i should have waited longer and it may have fixed itself.

    i shorted the cmos jumpers after and took the battery out, no effect.

    lesson, do not fcuk with bios if you dont know what you are doing

    i did the settings properly on this new mobo and dont see any difference what so ever
  12. Avenger_K said:
    It's CTRL + F1. :ange:



    I was close... never used a gigabyte motherboard b4 ;)
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