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Thread: No choice but to run 1.5v DDR3 at 1.6v




  1. #1
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    Default No choice but to run 1.5v DDR3 at 1.6v

    Hi.
    It was always my understanding that, unless you were overclocking, you should run memory at stock speed.
    I installed a new GA-EP45T-UD3LR board which is compatible of dram 1.5v motherboard and corsair xms3 DDR3 1333 memory which is supposed to run at default 1.5v but the PC Health Status page in the bios says the vdimm is 1.6v. In windows, Everest Computer Diagnostics & Network Audits Software is also saying that the vdimm is 1.6v. I am using the latest F10 bios and all values are on auto. Neither the CPU nor the GPU are overclocked.

    Can 1.6v RAM Damage GA-EP45T-UD3LR
    is this prob with my motherboard.. ...???
    Last edited by pc2008; 07-20-2011 at 11:11 AM.

  2. #2
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    Quote Originally Posted by pc2008 View Post
    Hi.
    It was always my understanding that, unless you were overclocking, you should run memory at stock speed.
    I installed a new GA-EP45T-UD3LR board which is compatible of dram 1.5v motherboard and corsair xms3 DDR3 1333 memory which is supposed to run at default 1.5v but the PC Health Status page in the bios says the vdimm is 1.6v. In windows, Everest Computer Diagnostics & Network Audits Software is also saying that the vdimm is 1.6v. I am using the latest F10 bios and all values are on auto. Neither the CPU nor the GPU are overclocked.

    Can 1.6v RAM Damage GA-EP45T-UD3LR
    is this prob with my motherboard.. ...???
    Thats your problem right there. You need to manually set ram speed and timings and voltages. do no use xmp profile or auto timings or voltages.

    Set everything according to the stickers on the ram. Download cpuz if you dont have it look at the memory and spd tab. Download the latest version of ET6 to show voltages.
    Main Rig
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    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.
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  3. #3
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    Everthing is corrcect.. the timings everything..... just the dram voltage showing auto 1.60v..
    if i continue to work on 1.60v can this cause any prob?

    my main concern was why mother board is detecting 1.5 ram as 1.6v in auto???

    http://www.gigabyte.com/products/pro...px?pid=3288#sp
    Last edited by pc2008; 07-20-2011 at 01:18 PM.

  4. #4
    Acebmxer's Avatar
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    Auto never works 100% correctly all the time. This is why we recommend everyone to set everything manually. Set vdimm to 1.5 or you may even need to set it to 1.52 or 1.54 to get a true 1.5v.
    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





  5. #5
    Chike is offline Senior Member
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    What is your memory part number?
    BIOS usually sets a bit higher voltage than standard, but shoult have set 1.57v not 1.6v though.
    also, please attach a text report of CPU-Z -> About tab -> Save Report (.TXT)

  6. #6
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    XMS3

    these are the specfications for ram....


    DIMM # 1
    SMBus address 0x50
    Memory type DDR3
    Module format UDIMM
    Manufacturer (ID) Corsair (7F7F9E0000000000)
    Size 2048 MBytes
    Max bandwidth PC3-10700H (667 MHz)
    Part number CM3X2G1333C9
    Number of banks 8
    Nominal Voltage 1.50 Volts
    EPP no
    XMP no
    JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1 6.0-6-6-16-23 @ 444 MHz
    JEDEC #2 7.0-7-7-19-27 @ 518 MHz
    JEDEC #3 8.0-8-8-22-30 @ 592 MHz
    JEDEC #4 9.0-9-9-24-34 @ 666 MHz

    DIMM # 2
    SMBus address 0x52
    Memory type DDR3
    Module format UDIMM
    Manufacturer (ID) Corsair (7F7F9E0000000000)
    Size 2048 MBytes
    Max bandwidth PC3-10700H (667 MHz)
    Part number CM3X2G1333C9
    Number of banks 8
    Nominal Voltage 1.50 Volts
    EPP no
    XMP no
    JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC #1 6.0-6-6-16-23 @ 444 MHz
    JEDEC #2 7.0-7-7-19-27 @ 518 MHz
    JEDEC #3 8.0-8-8-22-30 @ 592 MHz
    JEDEC #4 9.0-9-9-24-34 @ 666 MHz
    Last edited by pc2008; 07-21-2011 at 12:43 AM.

  7. #7
    Chike is offline Senior Member
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    Set voltage manually to 1.5-1.75v, the lowest that you are stable with.
    You may need to increase MCH Core a notch or two (1.16-1.18v) too if the system isn't stable.

  8. #8
    rbmorse is offline Junior Member
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    In answer to the OP's original question, it won't hurt to run your memory modules at 1.6V. Having said that, it would not be a bad idea to see if your machine is stable if you manually set the voltage to 1.5V, or perhaps 1.55 if 1.50 isn't reliable.
    EP45-UD3P 1.1
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  9. #9
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    changed ram value to 1.500

  10. #10
    Chike is offline Senior Member
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    Default Re: No choice but to run 1.5v DDR3 at 1.6v

    Run a few hours Prime95 nlend torture to make sure it is stable.
    Customize the blend to min FFT size 128k and time to run each test 8 minutes, and run 4+ hours.

    It would be also wise to monitor core temperatures with CoreTemp for the first 15 minutes and see max does not exceed 70c.

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