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Thread: Mushkin 998679 @ 2768Mhz - Dice Action W/ 6Ghz Inside - Personal PI Record




  1. #1
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Mushkin 998679 @ 2768Mhz - Dice Action W/ 6Ghz Inside - Personal PI Record



    In my quest to push Mushkin memory into the 3Ghz speed range I had a very short dry ice session this past weekend to familiarize myself with P55. I only had 10 pounds of dry ice, so I didn't get to run many tests this time around. I also did not freeze the memory this time around, that way my session would last longer and I would have a little more time to learn how P55 works.

    Next round I will be freezing the memory!

    Hardware Used for Session:
    GIGABYTE GA-P55A-UD6 1156 Motherboard
    Intel i5-655K EX Dual-Core CPU
    Intel i7-875K ES Quad-Core CPU
    Mushkin Blackline 998679 6GB 1600Mhz (PC3-12800) 7-8-7-24 Triple Channel DDR3 Memory Kit
    GIGABYTE 5870 SOC GV-R587SO-1GD 1GB Graphics Card
    Ultra X3 ULT40312 850W Power Supply

    Bartx Custom 2.0kg Dry Ice / Ln2 Pot

    I picked up a 655K to use in my quest because I found one at a killer price that couldn't be passed up, and just in case the 875K could not reach the Bclk necessary to reach 3Ghz memory speeds. Needless to say I was totally unaware of Clarkdale's memory limitations, so with this CPU I was left blind-sided - staring a 2140Mhz 898-24 validation when using the 655K. So in light of this I have decided that I should do a bit more reading next time around, with less anticipation of reaching 3Ghz, before blindly jumping into things!

    However, I was able to reach some outstanding speeds using 2GB modules and a 875K, but the 3Ghz range is still just out of my reach. I believe this is due to the fact that 2GB modules have their limitations, that I believe I've now reached. I am currently checking into 1GB modules right now, then I believe 3Ghz will be a breeze for me to obtain.

    Setup Insulated & Ready For the Freeze:






    I was able to reach some astonishing speeds using the Mushkin 998679 2GB modules and a GA-P55A-UD6, pushing well past my previous record of 2713Mhz.

    2763.4Mhz Dual 9-12-11-31



    CPU-Z Validator 3.1


    2768.2Mhz Single 9-12-10-29



    CPU-Z Validator 3.1


    I was also able to reach into the 6Ghz range with the 655K, with very tight memory timings to boot! This is the first time I've ventured into the 6Ghz range, and the Mushkin modules stood up with great pride, remaining stable with very tight timings for the speeds used.

    6Ghz - 2080Mhz @ 7-8-7-24



    CPU-Z Validator 3.1


    With these tight speeds being possible I knew I had a good chance at obtaining a high spot on the Overclock.net Super PI 1MB Top submissions thread. Drilling some of the more advanced timings down, and settling in at a modest 5.69Ghz CPU Speed, I was able to take second place in the top 10!

    Super PI 7.328s @ 1964.8Mhz 7-8-7-24



    Mushkin and Gigabyte take Second place for Super PI Submissions at OCN
    *OFFICIAL* SuperPi 1M Top Times - Overclock.net - Overclocking.net


    3Ghz is just around the corner, I can almost taste it!

    I'm positive Mushkin and Gigabyte will take me there very soon!


    Huge thanks to Mushkin and Gigabyte for making this possible!!
    Last edited by Lsdmeasap; 08-25-2010 at 02:39 AM.

  2. #2
    Lsdmeasap's Avatar
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    Default Re: Mushkin 998679 @ 2768Mhz - Dice Action W/ 6Ghz Inside - Personal PI Record

    Nobody noticed - Moving along

    Just wanted to post an update on my quest, something special is in the works, so stay tuned!
    Last edited by Lsdmeasap; 08-27-2010 at 03:06 AM.

  3. #3
    Chike is offline Senior Member
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    Default Re: Mushkin 998679 @ 2768Mhz - Dice Action W/ 6Ghz Inside - Personal PI Record

    First place of Super PI had a lower memory frequency however he had higher QPI Link and CPU frequency, and very low tRFC.
    I wonder which was it to make it 0.4 second faster.

  4. #4
    Lsdmeasap's Avatar
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    Default Re: Mushkin 998679 @ 2768Mhz - Dice Action W/ 6Ghz Inside - Personal PI Record

    I think it was his CPU freq, that seems to be the main key to PI.

    I'll get first place soon, at least I think/hope so

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