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Thread: i7 875k and memory multiplier




  1. #21
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    Default Re: i7 875k and memory multiplier

    Quote Originally Posted by wazza300 View Post
    you dont really need adjustable turbo boost imo,the power saving states do the same thing,they adjust the bclk/freq when idle and at load so whats the point in further turbo boost adjustment?
    Because when the bclk is above a certain speed, all that doesn't work. Trust me, I really tried to get EIST to work with my i7 860 running a bclk of 182MHz and a cpu multiplier of 22x. It never ever dropped the cpu speed or cpu multi. With the 875k and a bclk of 134MHz, it all works perfectly. I'm just looking for a little RAM gravy.
    CPU: i7 4770k at 4.3GHz Vcore=1.19v Vccin=1.8v Uncore=4GHz Vrin=1.09v
    MB: Gigabyte GA-Z87X-UD4H (Rev 1) F9
    Heatsink: Prolimatech Armageddon with 2 NF-A14's, Gelid GC Extreme TIM
    RAM: 2x4GB Crucial Ballistix DDR3-1600 @1600MHz Vdimm @1.5v (auto) 9-9-9-24
    SSD: Samsung 840 Pro 512GB; HD's: WD Black 4TB, WD Red 3TB
    PSU: Seasonic X-750; CM N600 case Trophy Run: 5GHz

  2. #22
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    Default Re: i7 875k and memory multiplier

    it should work,it works on my board with a 200x21,eist enabled but c1e disabled and balanced power saving profile selected in windows7 power options,at idle it throttles down to 200x12-0.992v,and full load 200x21-1.232v

    P.S. it works in windows xp in just the same way by looking in xp power saving options and selecting minimum hardware,keep c1e disabled in bios and it will still throttle as long as you keep all the other advanced cpu features enabled like eist. REMEMBER cpu only throttles when cpu voltage is set to normal setting or on auto,you can add extra voltage or take away voltage from load by using dvid +0.0****v or -0.0****v
    Last edited by wazza300; 10-11-2010 at 04:06 AM.
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
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  3. #23
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    Default Re: i7 875k and memory multiplier

    Here is a page that shows one of the Intel promo presentations.

    "Both of these new processors will come with fully adjustable DDR3, core clock and power settings. That means you will be able to move the frequency multipliers both below and ABOVE their defaults in order to find the best balance of speed and stability for your setup. Essentially, the big news here is that you can now simply adjust the Turbo Mode frequencies to increase the speed of the new K-series parts when performance is needed. You also gain the ability to push a lot more power through the CPU if necessary and the voltages will even scale dynamically with the Turbo Mode settings."
    CPU: i7 4770k at 4.3GHz Vcore=1.19v Vccin=1.8v Uncore=4GHz Vrin=1.09v
    MB: Gigabyte GA-Z87X-UD4H (Rev 1) F9
    Heatsink: Prolimatech Armageddon with 2 NF-A14's, Gelid GC Extreme TIM
    RAM: 2x4GB Crucial Ballistix DDR3-1600 @1600MHz Vdimm @1.5v (auto) 9-9-9-24
    SSD: Samsung 840 Pro 512GB; HD's: WD Black 4TB, WD Red 3TB
    PSU: Seasonic X-750; CM N600 case Trophy Run: 5GHz

  4. #24
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    Default Re: i7 875k and memory multiplier

    Quote Originally Posted by wazza300 View Post
    it should work,it works on my board with a 200x21,eist enabled but c1e disabled and balanced power saving profile selected in windows7 power options,at idle it throttles down to 200x12-0.992v,and full load 200x21-1.232v
    Now that sounds like an interesting approach. I may try that.
    CPU: i7 4770k at 4.3GHz Vcore=1.19v Vccin=1.8v Uncore=4GHz Vrin=1.09v
    MB: Gigabyte GA-Z87X-UD4H (Rev 1) F9
    Heatsink: Prolimatech Armageddon with 2 NF-A14's, Gelid GC Extreme TIM
    RAM: 2x4GB Crucial Ballistix DDR3-1600 @1600MHz Vdimm @1.5v (auto) 9-9-9-24
    SSD: Samsung 840 Pro 512GB; HD's: WD Black 4TB, WD Red 3TB
    PSU: Seasonic X-750; CM N600 case Trophy Run: 5GHz

  5. #25
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    Default Re: i7 875k and memory multiplier

    if gigabyte wrote a supporting bios that unlocked the memory multi to 14x,whats stopping it from working with all the other chips? maybe this is why they havnt released a supporting bios yet?idk
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  6. #26
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    Default Re: i7 875k and memory multiplier

    I tried the Windows minimum cpu power maneuver. It works fine. Thank you.

    Trouble is, my 875k needs more Vcore than my 860 did. And it seems to run hotter. I may go back to the 860.

    In the mean time, did Intel really mean it when it said the mem clock is unlocked?

    here (http://www.pcper.com/article.php?aid=924) we see the Intel promo that says "Increase DDR3 Ratios." What else could they mean?
    Last edited by ehume; 10-11-2010 at 04:33 AM.
    CPU: i7 4770k at 4.3GHz Vcore=1.19v Vccin=1.8v Uncore=4GHz Vrin=1.09v
    MB: Gigabyte GA-Z87X-UD4H (Rev 1) F9
    Heatsink: Prolimatech Armageddon with 2 NF-A14's, Gelid GC Extreme TIM
    RAM: 2x4GB Crucial Ballistix DDR3-1600 @1600MHz Vdimm @1.5v (auto) 9-9-9-24
    SSD: Samsung 840 Pro 512GB; HD's: WD Black 4TB, WD Red 3TB
    PSU: Seasonic X-750; CM N600 case Trophy Run: 5GHz

  7. #27
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    Default Re: i7 875k and memory multiplier

    it probably is unlocked,but does the current gigabyte bios support it? mem multi only goes to 12x on my board
    what voltage did normal give you for cpu? you can fine tune your load cpu voltage by setting dvid + to add and - to take off voltage only at load so your chip would run cooler providing you can find stabilty
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  8. #28
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: i7 875k and memory multiplier

    The Intel papers are probably referring to what I mentioned earlier, x14 is not available on any board's BIOS for Lynnfield CPU's, if that was possible one of the motherboard manufactures would have enabled it for sure by now.

    Look at EVGA, they have mods on boards to disable the Dual QPI CPU's feature so those CPU's can be used on a single board, surely with knowledge like that if x14 was possible for Lynnfield they would have been one of the first to enable it probably.

    It's just not in the CPU, so it's not going to work.

    As mentioned above surely you can increase Bclk to get what you want and still keeps temps down, arriving at the same overall freq should only require about the same amount of voltage - no matter how you get there.

    Sounds like maybe you should sell your 875K, go back to the 860 for a bit, and then once the 875K sells buy yourself a Clarkdale like 655K instead or 661. Then you will have many memory multipliers, keep in mind though Clarkdale's IMC is a bit different, and you may not get much above 2000-2100Mhz no matter the multiplier

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