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Thread: ? about memory voltage




  1. #1
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    Default ? about memory voltage

    i am going to buy a board that runs at 1.5 memory voltage and i was wondering if a could run memory that runs at either 1.6 or 1.65 memory voltage without doing damage to the board?



    thanks.


    dave.

  2. #2
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: ? about memory voltage

    Quote Originally Posted by 4pbears View Post
    i am going to buy a board that runs at 1.5 memory voltage and i was wondering if a could run memory that runs at either 1.6 or 1.65 memory voltage without doing damage to the board?



    thanks.


    dave.
    A little more info is need. What mother board?????

    The answer is yes/no You may need to make other changes to allow the memory to work.

    But before giving a Definite answer please list exact model numbers of motherboard and ram.
    Main Rig
    Gigabyte z87x-OC
    Haswell i7 4770k - 4.7Ghz @ 1.330v LLC Extreme (L310B492)
    G.Skill F3-1700CL9D-8GBXM DDR3-2133mhz 9-11-10-28 1.65v @ 2800mhz 12-14-14-35 1.7v
    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
    Sapphire ATI HD 7970 3GB clocked 1200MHz @ 1.181v.
    HiS ATI HD 6950
    Samsung 840 Pro 256GB SSD (boot Drive) on Intel sata3 controller port0
    Corsair Force GT 120 GB Sata3 SSD on Intel sata3 controller port1
    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
    Sony Optiarc DVD-RW AD-7240S on Intel sata3 controller port5
    CORSAIR CMPSU-850TX PSU
    Swiftech MCP655-B Pump
    EK Supremacy Cpu Block
    Swiftech Mcres Micro Rev 2 Reservoir
    Black Ice GTX Xtreme 360 Radiator





  3. #3
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    Default Re: ? about memory voltage

    the board is a gigabyte ga-x58a-oc; i hope this helps. this is the corsair memory i found, CMZ12GX3M3A1600C9 i had to call corsair to get this part #


    dave.

  4. #4
    Chike is offline Senior Member
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    Default Re: ? about memory voltage

    More is not always better.
    I have seen a DDR3 review where the memory clocked better at lower voltage than it's spec (which was 1.65v I think).
    Encauraged by this I went and tried the same with my DDR2, and it happens that I can run (even if not fully stable) about 60MHz higher with 2.0v than I could with 2.1v.
    e.g. the system won't even boot with DDR-1140 @ 2.1v, and with 2.0v it would run and pass a few hours of Prime95.

    To your question, JEDEC standard allow DDR3 to operate at up to 1.575v, and withstand up to 1.975v.
    DDR3 SDRAM - Wikipedia, the free encyclopedia

  5. #5
    Acebmxer's Avatar
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    Default Re: ? about memory voltage

    Quote Originally Posted by 4pbears View Post
    the board is a gigabyte ga-x58a-oc; i hope this helps. this is the corsair memory i found, CMZ12GX3M3A1600C9 i had to call corsair to get this part #


    dave.
    Quote Originally Posted by Chike View Post
    More is not always better.
    I have seen a DDR3 review where the memory clocked better at lower voltage than it's spec (which was 1.65v I think).
    Encauraged by this I went and tried the same with my DDR2, and it happens that I can run (even if not fully stable) about 60MHz higher with 2.0v than I could with 2.1v.
    e.g. the system won't even boot with DDR-1140 @ 2.1v, and with 2.0v it would run and pass a few hours of Prime95.

    To your question, JEDEC standard allow DDR3 to operate at up to 1.575v, and withstand up to 1.975v.
    DDR3 SDRAM - Wikipedia, the free encyclopedia
    What chike is talking about is alittle bit more in dept of what you are asking.

    In your case yes you can run ram that is rated at 1.65v or higher. Doing so will probably void your warrenty with gigabyte / intel as they recommend the 1.5v.

    Here is the thing you can run ram voltage up to 1.9-2.0 (extreme overclocking using LN2). They key is your qpi/vtt voltage must be with in 0.5v of your vdimm. So lets say your ram is rated at 1.65v so qpi/vtt must be higher then 1.15v anything lower will cause damage. If you need to run 1.8v vdimm, then qpi/vtt must be 1.3v or higher.
    Main Rig
    Gigabyte z87x-OC
    Haswell i7 4770k - 4.7Ghz @ 1.330v LLC Extreme (L310B492)
    G.Skill F3-1700CL9D-8GBXM DDR3-2133mhz 9-11-10-28 1.65v @ 2800mhz 12-14-14-35 1.7v
    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
    Sapphire ATI HD 7970 3GB clocked 1200MHz @ 1.181v.
    HiS ATI HD 6950
    Samsung 840 Pro 256GB SSD (boot Drive) on Intel sata3 controller port0
    Corsair Force GT 120 GB Sata3 SSD on Intel sata3 controller port1
    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
    Sony Optiarc DVD-RW AD-7240S on Intel sata3 controller port5
    CORSAIR CMPSU-850TX PSU
    Swiftech MCP655-B Pump
    EK Supremacy Cpu Block
    Swiftech Mcres Micro Rev 2 Reservoir
    Black Ice GTX Xtreme 360 Radiator





  6. #6

    Default Re: ? about memory voltage

    Acebmxer, run ram voltage up 1.65v qpi/vtt how should it be? thank you :)

  7. #7
    Acebmxer's Avatar
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    Default Re: ? about memory voltage

    Quote Originally Posted by NуроFеn View Post
    Acebmxer, run ram voltage up 1.65v qpi/vtt how should it be? thank you :)
    If you need 1.65v for vdimm the minimal that qpi/vtt needs to be is 1.15v. Now you may need more to be stable but that is the lowest it can be.
    Main Rig
    Gigabyte z87x-OC
    Haswell i7 4770k - 4.7Ghz @ 1.330v LLC Extreme (L310B492)
    G.Skill F3-1700CL9D-8GBXM DDR3-2133mhz 9-11-10-28 1.65v @ 2800mhz 12-14-14-35 1.7v
    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
    Sapphire ATI HD 7970 3GB clocked 1200MHz @ 1.181v.
    HiS ATI HD 6950
    Samsung 840 Pro 256GB SSD (boot Drive) on Intel sata3 controller port0
    Corsair Force GT 120 GB Sata3 SSD on Intel sata3 controller port1
    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
    Sony Optiarc DVD-RW AD-7240S on Intel sata3 controller port5
    CORSAIR CMPSU-850TX PSU
    Swiftech MCP655-B Pump
    EK Supremacy Cpu Block
    Swiftech Mcres Micro Rev 2 Reservoir
    Black Ice GTX Xtreme 360 Radiator





  8. #8
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    Default Re: ? about memory voltage

    1.65v ram on x58 will work but you are walking a very fine line
    be safe and get a better oc with 1.5v ram

    sandybridge chips can take 1.65 with no vtt adujustment but not x58
    if you run x58 @ 1.65 without adjusting the vtt to at least 1.155 you run the risk of burning the imc out
    and if you run ram voltage ANY ANYMORE then 1.65 YOU WILL break it

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