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KHX2000C8D3T1K3/6GX DDR3-2191Mhz CAS7!

Discussion in 'Memory' started by eva2000, May 11, 2010.

  1. eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
    Jun 27, 2001
    Messages:
    21,980
    Location:
    Brisbane, Australia
    Elpida Hyper FTW http://i4memory.com/f83/khx2000c8d3tk3-6gx-elpida-mgh-e-hyper-core-i7-980x-23731/ :D

    DDR3-2160Mhz 7-7-7-21 1T at 1.78v


    [​IMG]


    DDR3-2191Mhz 7-7-7-21 1T at 1.78v


    [​IMG]

    [​IMG]


    How about 6-6-6-20 1T :D Windows max 32M Pi @DDR3-1850Mhz 6-6-6-20 1T, max 1M Pi @DDR3-1880Mhz 6-6-6-20 1T and validation @DDR3-1893Mhz 6-6-6-20 1T.

    max 32M Pi @DDR3-1850Mhz 6-6-6-20 1T​


    [​IMG]

    max 1M Pi @DDR3-1880Mhz 6-6-6-20 1T​


    [​IMG]

    max validation @DDR3-1893Mhz 6-6-6-20 1T​


    CPU VTT = 1.50v
    VDIMM = 1.76v

    [​IMG]

    [​IMG]

    System:
    • Intel Core i7 980X 3951A763 B1 Step 2 ES
    • EK Supreme LT H20 + TFC480 + MCP655
    • Asus P6T6 WS Revolution 0609 beta bios
    • Sapphire HD5870 10.3 beta
    • 6GB Kingston 2000C8 (KHX2000C8D3T1K3/6GX)
    • 80GB Intel X25-M G2 SSD (OS)
    • 120GB OCZ Vertex SSD (DATA)
    • Pioneer DVR216 Burner
    • Corsair HX1000
    • Windows 7 Ultimate 64bit RTM (fully updated)
     
    Last edited: May 12, 2010
  2. snappy1

    snappy1 Member

    Joined:
    Feb 18, 2008
    Messages:
    4,169
    Location:
    Benching
    Those are some great results Eva and really nice looking triple kit.

    I sent another dom GT to Corsair heaven tonight, might look into a set of these
     
  3. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
    Jun 27, 2001
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    Location:
    Brisbane, Australia
    Ouch sorry to hear about your GTs.. CMG SKUs ?
     
  4. snappy1

    snappy1 Member

    Joined:
    Feb 18, 2008
    Messages:
    4,169
    Location:
    Benching
    CMG's 0935034B

    It's not a great loss, one died ages ago, I have been too slack to rma and was using the two good ones testing for GOOC.

    The frustrating part is I was on a 5.33Ghz 980x 32m run at the time:D
     
    Last edited: May 11, 2010
  5. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

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    I see... 5.33ghz sweet would be good for sub 6min 50s 32m at least :)
     
  6. stablez

    stablez Member

    Joined:
    Apr 8, 2006
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    Humidycrib
    Cool eva.
    Thats a nice clock with latency iv seen expecting never less with Kingston.

    Iv got to keep updated. Iam on a cafe internet...
    :Paranoid:
     
  7. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
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    thanks.. started some 3d runs with HD5870 and HD5970 single cards

    [​IMG]

    [​IMG]
     
  8. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
    Jun 27, 2001
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    Location:
    Brisbane, Australia
    My 2nd fastest PB for 32M - yeah H20 cooled only :)

    The resulting 32M Pi time ended up my 2nd fastest PB time just behind my W3520 + DFI UT X58-T3EH8 @4794Mhz H20 time of 7min 24.422s

    4769Mhz with DDR3-2167Mhz 7-7-7-21 at 1.8v for 7min 24.937s. Very close to the limits of the voltages used and/or close to my max H20 cooled i7 980X Super Pi 32M stability or could be memory limit considering this KHX2000C8D3T1K3/6GX kit did DDR3-2160mhz 7-7-7-21 at 1.78v for 32M with same i7 980X.

    [​IMG]

    Finally new PB for 7-7-7-21 validation at @DDR3-2235Mhz 7-7-7-21 at 1.8v

    [​IMG]

    [​IMG]


    System:
    • Intel Core i7 980X 3951A763 B1 Step 2 ES
    • EK Supreme LT H20 + TFC480 + MCP655
    • Asus P6T6 WS Revolution 0609 beta bios
    • Sapphire HD5970 OC Edition 10.4 Official Catalyst Drivers
    • 6GB Kingston 2000C8 (KHX2000C8D3T1K3/6GX)
    • 750GB Samsung SATAII OS
    • 120GB OCZ Vertex SSD (DATA)
    • Pioneer DVR216 Burner
    • Corsair HX1000
    • WinXP Pro SP3 nlite + Windows 7 Ultimate 64bit RTM (fully updated) dual boot OS
     
  9. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
    Jun 27, 2001
    Messages:
    21,980
    Location:
    Brisbane, Australia
    6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX scaling tests, when I reduced the Uncore frequency multiplier from 24x to 23x - I reduced the Uncore frequency from 4128Mhz to 4071Mhz and thus managed to jump from DDR3-2064Mhz to DDR3-2124Mhz at the same voltages of 1.45v CPU VTT and 1.66v VDIMM all thanks to Core i7 980X's lower minimum Uncore to Memory ratio requirements!

    6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
    @DDR3-2124Mhz 8-8-8-24 1T at 1.66v​

    • 23x 177bclk = 4071Mhz cpu frequency
    • 23x 177bclk = 4071Mhz Uncore frequency (cpuz reports it as NB frequency)
    • 18x 177bclk = 3186Mhz QPI frequency
    • 12x 177bclk = DDR3-2124Mhz memory frequency

    [​IMG]

    6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
    @DDR3-2230Mhz 8-8-8-24 1T at 1.66v​


    Managing to use TurboV to push bclk incrementally until I reached DDR3-2230Mhz 8-8-8-24 1T at 1.45v CPU VTT and 1.66v VDIMM !
    • 23x 186bclk = 4275Mhz cpu frequency
    • 23x 186bclk = 4275Mhz Uncore frequency (cpuz reports it as NB frequency)
    • 18x 186bclk = 3345Mhz QPI frequency
    • 12x 186bclk = DDR3-2230Mhz memory frequency

    [​IMG]

    System:
    • Intel Core i7 980X 3951A763 B1 Step 2 ES
    • EK Supreme LT H20 + TFC480 + MCP655
    • Asus P6T6 WS Revolution 0609 beta bios
    • Sapphire HD5970 OC Edition 10.4 Official Catalyst Drivers
    • 6GB Kingston 2000C8 (KHX2000C8D3T1K3/6GX)
    • 750GB Samsung SATAII OS
    • 120GB OCZ Vertex SSD (DATA)
    • Pioneer DVR216 Burner
    • Corsair HX1000
    • WinXP Pro SP3 nlite + Windows 7 Ultimate 64bit RTM (fully updated) dual boot OS
     
  10. converge

    converge Member

    Joined:
    Aug 29, 2009
    Messages:
    2,316
    Location:
    Melbourne
    Awesome results eva, I just ordered a kit :) Pretty damn cheap for such quality ram.
     
  11. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
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    21,980
    Location:
    Brisbane, Australia
    thanks, all the best with your kit too - let us know how they do.

    What about DDR3-2305Mhz 8-8-8-24 at 1.66v air cooled memory :D

    6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
    @DDR3-2184Mhz 8-8-8-24 1T at 1.66v​

    Next step was to drop the Uncore multiplier one more step from 23x to 22x. You'd think this would by default allow higher memory clocks, but it didn't. The reason being on Asus P6T6 WS Revolution, Uncore frequency is tied to Round Trip Latency (RTL) A/B/C channels and auto adjusts to tighter RTL values as you lower the Uncore multiplier. For further reading on this check out the info about optimal Uncore to DRAM memory ratios for Core i7 980X.

    So next step is to manually loosen RTL A/B/C channel values with Uncore multiplier dropped from 23x to 22x which allowed windows to boot in and pass single Super Pi 32M run @DDR3-2184Mhz 8-8-8-24 1T at same 1.45v CPU VTT and 1.66v VDIMM ! And ended up max screenshot captured clocks at DDR3-2305Mhz 8-8-8-24 1T at same voltages.

    • 23x 182bclk = 4186Mhz cpu frequency
    • 22x 182bclk = 4014Mhz Uncore frequency (cpuz reports it as NB frequency)
    • 18x 182bclk = 3276Mhz QPI frequency
    • 12x 182bclk = DDR3-2184Mhz memory frequency

    [​IMG]

    6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
    @DDR3-2305Mhz 8-8-8-24 1T at 1.66v​


    • 23x 192bclk = 4418Mhz cpu frequency
    • 22x 192bclk = 4226Mhz Uncore frequency (cpuz reports it as NB frequency)
    • 18x 192bclk = 3457Mhz QPI frequency
    • 12x 192bclk = DDR3-2305Mhz memory frequency

    [​IMG]

    System:
    • Intel Core i7 980X 3951A763 B1 Step 2 ES
    • EK Supreme LT H20 + TFC480 + MCP655
    • Asus P6T6 WS Revolution 0609 beta bios
    • Sapphire HD5970 OC Edition 10.4 Official Catalyst Drivers
    • 6GB Kingston 2000C8 (KHX2000C8D3T1K3/6GX)
    • 750GB Samsung SATAII OS
    • 120GB OCZ Vertex SSD (DATA)
    • Pioneer DVR216 Burner
    • Corsair HX1000
    • WinXP Pro SP3 nlite + Windows 7 Ultimate 64bit RTM (fully updated) dual boot OS
     
  12. rbdirty

    rbdirty Member

    Joined:
    Jun 6, 2008
    Messages:
    542
    Do lower cycle refresh times assist with 32m superpi efficiency?
     
  13. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
    Jun 27, 2001
    Messages:
    21,980
    Location:
    Brisbane, Australia
    yup lower tRFC does help as long as you have the right amount of volts :)
     
  14. chainbolt

    chainbolt Member

    Joined:
    Jun 27, 2001
    Messages:
    113,222
    Location:
    Tokyo_Munich
    I have the same chips, the original one directly from Elpida. It runs at default voltage (1.5 volt) 8-8-8 at 2130 Mhz for daily usage with a 980.
     
  15. OP
    OP
    eva2000

    eva2000 DDR1/DDR2/DDR3 Addict

    Joined:
    Jun 27, 2001
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    Brisbane, Australia
    got any screenies with cputweaker ? 1.5v is very low volts!
     

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