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Thread: OC'ing my first CPU: i7 2600K




  1. #1
    Join Date
    Feb 2012
    Location
    France
    Posts
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    Default OC'ing my first CPU: i7 2600K

    Hi everyone,

    I have started overclocking my CPU, first ever, and found a bunch of reference materials.

    The materials I'm referencing are:
    Started here:
    http://www.clunk.org.uk/forums/overclock...nners.html

    Then I went here:
    http://www.overclock.net/t/968053/offici...preadsheet

    Off the same thread above:
    http://www.overclock.net/t/968053/offici...t_14466483

    So if I understand correctly.

    - Need to find the correct Vcore for the multiplier
    - However before that Need to first find the correct LCC setting to minimize Vdroop (spikes) as much as possible.
    - However need to know what your Vcore is under load - assuming it's the multiplier you wanted to find in the first place
    - Then you need to increment your Vcore slightly until it's passing Prime85
    - Then thereafter need to bring down the PLL voltage once becoming closer to stable.

    So it all seems circular.
    - How do I know what my multiplier will be when I'm trying to ramp up my Vcore based on it?
    - Do I set my Vcore to 1.45, my PLL voltage to 1.7, the other parameters based on the P67 OC link from HR, and then keep increasing the multiplier until I see temp / stability concerns?

    What I have done:
    - Followed the guidelined in the first link for 4000MHz, and bios would flash and reboot again into window repair. So i kept raising my Vcore incrementally. After 4 increments, just tried 1.35v, and it finally booted.
    - Tried 4500MHz, Ran Prime95, and although CPUZ confirmed that it hit 4500, it would soon step down the multiplier. I raised the Vcore to 1.4, and it still did the same?
    - Reset all settings back to default, and tried the mobo presetting for 4400MHz, and everything ran fine. CPUZ was pegged to 4400 the whole time Prime95 was testing. Used the 4600 OC preset, also worked. Ran Prime95 running blend for 3 hours (short I know). My Vcore is 1.360 and my VID is 1.406 under load and my max temps have hit 73C after 1 hour into the test.
    - Got help on other forums to set the max overclock (or something like that) from 150 to 250, when in manual OC settings, but still have the multi step down problem. Then read more about this Vdroop, PLL voltage to 1.7v, etc...

    So I'm stuck.
    If my manual setting does not peg the turbo to it's max, does that mean need to play with PLL? Vcore? Up/down? Something else?
    Do I go to the 4800MHz presetting to see the voltages and then try to step it down from there?
    Do i know my OC limits yet?

    Frustrating point is that I'm traveling away this weekend, and wont be in front of the machine until Sunday night my time. So doing this from memory. :-/

    Anyway appreciate some guideance on some sound steps to take...when to worry about PLL voltage, the VID to Vcore delta, etc.
    ------------------------------==================[ Current Rig - Still tweaking ]==================---------------------------------
    CPU:
    Intel i7-2600K @ 4.6GHz, 1.36v-load Mobo: ASRock P67 EXTREME4 GEN3 SATA 6Gb/s USB 3.0 ATX RAM: Corsair Vengence 16GB 1600Mhz DDR3
    GPU: Sapphire Radeon HD 7970 3GB SSD: Samsung 830 Series 256GB SATA 6.0Gb/s SSD HDD: Seagate Barracuda 1TB PSU: SeaSonic Platinum-1000 1000W 80 PLUS
    Optical Drive: SONY - Interal DVD 24x - ad-5280S - sata Case: Cooler Master Storm Trooper Cooler: Thermalright SilverArrow CPU Cooler
    Sound: Creative Sound Blaster X-Fi Titanium Fatal1ty PCI-E x1 Monitor: ViewSonic 27" vx2753mh-LED running in 1920x1080p @ 60Hz

  2. #2
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
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    Default Re: OC'ing my first CPU: i7 2600K

    you dont really need to alter much for 4.5ghz,around 1.36v cpu,vtt can be left stock 1.05v and dram voltage 1.5v,llc set to high or middle setting depending on your mb,everything else can be left on auto,

    EDIT just saw your running 16gb so might need a little more vtt you will need to test,no more than 1.2v,and no more than 1.5750v for dram,keep temps below 75c imo,
    Last edited by wazza300; 02-19-2012 at 09:53 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!!
    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!!!!!!!!!!!!!!!!!!!!!!

  3. #3
    Join Date
    Feb 2012
    Location
    France
    Posts
    42

    Default Re: OC'ing my first CPU: i7 2600K

    Thanks Wazza.

    I can get it to 4500 manually, but I did alot of tweaking on locking down other voltages and timings which I didnt know how they related to the OCing (except if it related to OC'ing the RAM, where there I'd understand). So will try that and leave more on auto.

    Only question I have relates to "stablility" which per the definition of most these sites is to run Prime95 without errors or BSODs. Nothing mentions what to do if the CPU steps down its mult on its own. Is that a similar issue to failing a Prime95 test and the response is more Vcore?

    And then after 4500? How do I know where my multiplier max would be? Do I crank up the Vcore to 1.4, check my temps and based on those two limits, i tweak the rest to being down all the volatages to keep it as cool as possible while still keeping it performing?
    Last edited by ped; 02-19-2012 at 07:54 PM.
    ------------------------------==================[ Current Rig - Still tweaking ]==================---------------------------------
    CPU:
    Intel i7-2600K @ 4.6GHz, 1.36v-load Mobo: ASRock P67 EXTREME4 GEN3 SATA 6Gb/s USB 3.0 ATX RAM: Corsair Vengence 16GB 1600Mhz DDR3
    GPU: Sapphire Radeon HD 7970 3GB SSD: Samsung 830 Series 256GB SATA 6.0Gb/s SSD HDD: Seagate Barracuda 1TB PSU: SeaSonic Platinum-1000 1000W 80 PLUS
    Optical Drive: SONY - Interal DVD 24x - ad-5280S - sata Case: Cooler Master Storm Trooper Cooler: Thermalright SilverArrow CPU Cooler
    Sound: Creative Sound Blaster X-Fi Titanium Fatal1ty PCI-E x1 Monitor: ViewSonic 27" vx2753mh-LED running in 1920x1080p @ 60Hz

  4. #4
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
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    Default Re: OC'ing my first CPU: i7 2600K

    if any of the prime95 workers stop then its failing the test,it will clock down slightly then back up to full 4.5ghz when testing,you shouldnt need 1.4v for 4.5ghz,around 1.36v,try highering llc and lowering cpu voltage in dvid

    ram speed/timings/voltages should be set manually anyway
    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!!!!!!!!!!!!!!!!!!!!!!

  5. #5
    Join Date
    Feb 2012
    Location
    France
    Posts
    42

    Default Re: OC'ing my first CPU: i7 2600K

    Repost:
    Ok, I'm going to try for 4.6ghz given thats the preset that worked for on Prime 95 blend for 19hours.
    I started at 1.32v Vcore, and am now at 1.35v, and stopped for the night.

    Here's the parameters:
    Turbo - manual
    Min turbo power - 250
    Max turbo power - 250
    CCL - 250

    LLC - level 3 (should I switch higher?) BTW - is more LLC mean level 5 or 1? 1 is highest, right?
    Dram - 1.5v
    PLL - 1.709v
    PCH - Auto
    VCCSA - Auto
    VCC - Auto (should I make this manual?)

    When loaded:
    Bclk - 99.8 (should i turn off spreading?)
    Core clk - 4589.9 MHz (not sure why its not 4600.1 avg as it does with preset)
    VID - hovers around 1.38v
    Vcore - can drop to 1.32

    Not stable yet. Still failing Prime 95 or BSOD before I left it for sleep for the night.

    Will write up more progress tomorrow.

    Thanks!
    Last edited by ped; 02-21-2012 at 01:07 PM. Reason: Can't write voltages correctly late at night.
    ------------------------------==================[ Current Rig - Still tweaking ]==================---------------------------------
    CPU:
    Intel i7-2600K @ 4.6GHz, 1.36v-load Mobo: ASRock P67 EXTREME4 GEN3 SATA 6Gb/s USB 3.0 ATX RAM: Corsair Vengence 16GB 1600Mhz DDR3
    GPU: Sapphire Radeon HD 7970 3GB SSD: Samsung 830 Series 256GB SATA 6.0Gb/s SSD HDD: Seagate Barracuda 1TB PSU: SeaSonic Platinum-1000 1000W 80 PLUS
    Optical Drive: SONY - Interal DVD 24x - ad-5280S - sata Case: Cooler Master Storm Trooper Cooler: Thermalright SilverArrow CPU Cooler
    Sound: Creative Sound Blaster X-Fi Titanium Fatal1ty PCI-E x1 Monitor: ViewSonic 27" vx2753mh-LED running in 1920x1080p @ 60Hz

  6. #6
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
    Posts
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    Default Re: OC'ing my first CPU: i7 2600K

    1.5v is way too much,please try to stay below 1.4v,4.6ghz should be achievable with 1.36-1.4v max

    to lower voltage offset simply lower the amount used,offset only gets applied at load cpu freq,as for all the llc levels id say level one is the least and level 5 is the highest? on my board it says regular/high/ultra ect,keep an eye on how much the llc applies to your load cpu voltage and higher/lower offset to compensate,(this is what i find the trickiest part of sb)
    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!!!!!!!!!!!!!!!!!!!!!!

  7. #7
    Join Date
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    Location
    France
    Posts
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    Default Re: OC'ing my first CPU: i7 2600K

    Quote Originally Posted by wazza300 View Post
    1.5v is way too much,please try to stay below 1.4v,4.6ghz should be achievable with 1.36-1.4v max

    to lower voltage offset simply lower the amount used,offset only gets applied at load cpu freq,as for all the llc levels id say level one is the least and level 5 is the highest? on my board it says regular/high/ultra ect,keep an eye on how much the llc applies to your load cpu voltage and higher/lower offset to compensate,(this is what i find the trickiest part of sb)
    Oh geez, completely should not be writing too late at night ... Was 1.35, not 1.5. Sorry about that. I corrected it again in the above post.

    It would have been nice if the mobo under the description put which on was ultra ect. Instead it shows a graph with Vcore on the y axis and load on the other. Level 1 is indicated as a straight line, level 5 decreases the most as load goes up. So guess that means level 1 is ultra is my case?
    ------------------------------==================[ Current Rig - Still tweaking ]==================---------------------------------
    CPU:
    Intel i7-2600K @ 4.6GHz, 1.36v-load Mobo: ASRock P67 EXTREME4 GEN3 SATA 6Gb/s USB 3.0 ATX RAM: Corsair Vengence 16GB 1600Mhz DDR3
    GPU: Sapphire Radeon HD 7970 3GB SSD: Samsung 830 Series 256GB SATA 6.0Gb/s SSD HDD: Seagate Barracuda 1TB PSU: SeaSonic Platinum-1000 1000W 80 PLUS
    Optical Drive: SONY - Interal DVD 24x - ad-5280S - sata Case: Cooler Master Storm Trooper Cooler: Thermalright SilverArrow CPU Cooler
    Sound: Creative Sound Blaster X-Fi Titanium Fatal1ty PCI-E x1 Monitor: ViewSonic 27" vx2753mh-LED running in 1920x1080p @ 60Hz

  8. #8
    Join Date
    Aug 2009
    Location
    Birmingham,Great Britain
    Posts
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    Default Re: OC'ing my first CPU: i7 2600K

    im not sure,but i think your right
    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!!!!!!!!!!!!!!!!!!!!!!

  9. #9
    Join Date
    Feb 2012
    Location
    France
    Posts
    42

    Default Re: OC'ing my first CPU: i7 2600K

    Quote Originally Posted by wazza300 View Post
    to lower voltage offset simply lower the amount used,offset only gets applied at load cpu freq,as for all the llc levels id say level one is the least and level 5 is the highest? on my board it says regular/high/ultra ect,keep an eye on how much the llc applies to your load cpu voltage and higher/lower offset to compensate,(this is what i find the trickiest part of sb)
    Just to clarify for me a bit, what do you mean by lowering the amount used? Lowering the LLC? I read about this offset several times in several posts, and although I understand the concept, no idea what levers we are talking about. If you could break it down for me a bit, would be great.

    Thanks much Wazza

    EDIT: Ahhhh, I finally get it. Once I find my Vcore voltage, I then switch settings from Vcore fixed to Vcore offset, and I base it off the VID! Finally! I see what we mean now!!

    I also realized that my LLC was way too low and my Vdroop was preventing me from finding my real voltage... so will need to start over again.

    A few wrap up questions:
    1.) My multiplier is at 46 (that's ok), however my BCLK is only 99.8.. which means my core spead never goes above 4.590 GHz. Is that because of the "Spread Spectrum" being enabled? Or related to something else?
    2.) How do I find out how much the LLC is applying to my voltage and if it has "spikes"? Is that determined what I lock my Vcore at (prior to putting it on offset), and how much Vdroop there is? Or is there another way to measure LLC?

    Cheers.
    Last edited by ped; 02-22-2012 at 04:33 AM.
    ------------------------------==================[ Current Rig - Still tweaking ]==================---------------------------------
    CPU:
    Intel i7-2600K @ 4.6GHz, 1.36v-load Mobo: ASRock P67 EXTREME4 GEN3 SATA 6Gb/s USB 3.0 ATX RAM: Corsair Vengence 16GB 1600Mhz DDR3
    GPU: Sapphire Radeon HD 7970 3GB SSD: Samsung 830 Series 256GB SATA 6.0Gb/s SSD HDD: Seagate Barracuda 1TB PSU: SeaSonic Platinum-1000 1000W 80 PLUS
    Optical Drive: SONY - Interal DVD 24x - ad-5280S - sata Case: Cooler Master Storm Trooper Cooler: Thermalright SilverArrow CPU Cooler
    Sound: Creative Sound Blaster X-Fi Titanium Fatal1ty PCI-E x1 Monitor: ViewSonic 27" vx2753mh-LED running in 1920x1080p @ 60Hz

  10. #10
    Join Date
    Aug 2009
    Location
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    Default Re: OC'ing my first CPU: i7 2600K

    i dont know why its not using 100bclk,it should let you set it in bios,could try disabling spread spectrum



    as for llc you just have to see how much extra each level applies to your cpu voltage and cpu voltage offset,mine ends up being 1.36 with llc on high,yet its only showing 1.17v in bios(this is the hardest part) as ive never really messed with llc or felt the need to use it on my x58 board,ive noticed with low llc level and high voltage offset,cpu voltage jumps high from an idle clock to light loading,yet if you set a low voltage offset and high llc it doesnt shoot up or spike as high when cpu is lightly loaded(not full load)

    its kinda split into two,the cpu and voltages between idle clocks/voltages and load clocks/voltages and offset and llc affect this too slightly so you need to find the right balance

    thats what i think anyway,im new to sb
    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!!!!!!!!!!!!!!!!!!!!!!

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