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Thread: Z77A-GD65 + i5 2500K Overclocking - How to start?




  1. #91
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    As I recall:
    CPU:OCCT is similar to Prime95 and uses small, medium, or large datasets. I don't know if this mode uses AVX.
    CPU:LINPACK is similar to IBT and LinX
    GPU:3D is similar to Furmark, but it doesn't appear to support DX11
    POWER SUPPLY: Does all of the above and puts a maximum load on your power supply!!

    It looks like the only test that supports AVX is the Linpack option.
    Much as I like some of the OCCT features, I think that you will be better off with Prime95.
    My personal preference is to go with Prime95 (AVX), HCI Memtest and if you want a GFlops score, IBT or LinX for a brief 5 loop test using all available memory.

    It might be useful to run the OCCT Linpack test if you want to test with a another AVX program.

    A web search using: prime95 vs occt might provide more detailed information.
    http://www.ocbase.com/index.php/support might provide more information.
    A web search using: occt forum should provide useful feedback.
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  2. #92
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    Grazie
    CPU: i5 2500K @ 4.5GHz (45x100 1.35V) ~ BIOS 10.5
    Motherboard: MSI Z77A-GD65
    Memory: 2x4GB Corsair Vengeance DDR3-1600 9-9-9-24
    GPU: XFX Radeon 7950 Black Edition 3GB
    Soundcard: Native Instruments Audio 8 DJ
    HDD: WD 1TB Caviar Blue
    Cooling: Zalman CNPS10X Extreme
    PSU: Seasonic X-650 80+ Gold
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    OS: Windows 7 Ultimate x64
    Gamepad: Microsoft XBOX360 Wireless Controller + Wireless Gaming Receiver
    Wireless Set: Logitech Cordless Desktop LX710
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  3. #93
    Chike is offline Senior Member
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    I have never yet seen a SB system in my own eyes.
    You know the voltages just keep playing with them.
    Just for the kick try lower PLL, I mean under 1.8, 1.78 -1.74.
    I didn't say VTT 1.2 is safe I said I have seen people that use it as high, or close, and also people that set Vccsa over 1.1v, how safe it is I don't know.
    Try also to lower the DRAM voltage, some modules operate and OC better with lower voltage rather than high.

  4. #94
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    Update:

    So I raised Vcore to 1.42 (1.40 in CPU-Z) and tested.

    10 loops of IBT on Max (6700MB), passed.
    Did a large FFT test for 6.5 hours, passed.
    Did a small FFT test for 4 hours, passed.
    Then I did a blend test which amazingly, failed after 7.5 hours... I don't know the exact size of the FFT but it had to be something in between 100-200K according to the pattern.

    I have no way to explain this, the only possible one I can think of is that while I was asleep the CPU temperature got close to 80C as I turned off the AC and the system may have BSOD'ed itself due to the high temp, the error code was again 124 but there's no way that there wasn't enough Vcore.

    I wanna call this stable, what do you think? I don't think Prime failed because of a stability issue because it passed a large FFT test of 6.5 hours.
    CPU: i5 2500K @ 4.5GHz (45x100 1.35V) ~ BIOS 10.5
    Motherboard: MSI Z77A-GD65
    Memory: 2x4GB Corsair Vengeance DDR3-1600 9-9-9-24
    GPU: XFX Radeon 7950 Black Edition 3GB
    Soundcard: Native Instruments Audio 8 DJ
    HDD: WD 1TB Caviar Blue
    Cooling: Zalman CNPS10X Extreme
    PSU: Seasonic X-650 80+ Gold
    Case: Corsair Obsidian 650D

    OS: Windows 7 Ultimate x64
    Gamepad: Microsoft XBOX360 Wireless Controller + Wireless Gaming Receiver
    Wireless Set: Logitech Cordless Desktop LX710
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  5. #95
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    Thumbs up Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    What are the cpu and memory speeds that you used with vcore = 1.42 volts?
    What are the other bios voltages and custom settings that you used?

    CoreTemp allows temperature logging and you can set the logging interval in seconds.
    I think that the default setting is 10 second intervals.
    RealTemp probably has a similar interval logging option.

    Is your system stable? Possibly.
    How long does each Prime95 test need to run for a system to be considered stable?
    8 hours? 12 hours? 48 hours?
    There isn't one definitive answer.
    I'm satisfied if each test completes 12 hours. This is my personal optinion based on SWAG.
    Be nice to your cpu, don't run IBT or LinX for more than 5 loops using all available memory.

    Run some additional AVX stress tests using different programs for 8 hours or longer.
    This should help remove any doubt as to how stable your system is.
    Don't forget the run the multi GB zip/test integrity/unzip test that I described earlier.

    Food for thought:
    As the bios matures for your motherboard, higher overclocking and better stability might be possible.
    This is very common with any recently released motherboard/chipset release.
    When you upgrade to newer bios versions, it's very common that you will need to tweak some of your previously stable bios settings.
    Remember that tweaking requires repeating stress testing.
    When you flash to a different bios version (new or old) you will probably lose all your saved bios settings.

    From what seen, it looks like many or most z77 boards can o/c to 4.0 - 4.2GHz with nearly stock voltage settings.
    YMMV

    Nice job!!
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    P35-DS4 [rev: 2.0] ~ Bios: F14
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    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
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    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
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  6. #96
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    I tried 4.6GHz with:

    Vcore - 1.42
    S/A - 0.965
    I/O - 1.07
    PLL - 1.84
    DRAM - 1.504

    Memory at 1600Mhz with hard set timings of 9-9-9-24 and the DRAM voltage is manually set to 1.504
    At first I tried IBT with PLL at 1.8 but each loop took 180 seconds and yielded 92 GFlops as opposed to 130 seconds and 120 GFlops before.

    So I raised PLL to 1.84 again and presto, loop completed at 130 seconds with 120 GFlops.

    Is there a CoreTemp log that can tell me what was the temp was at the time of the BSOD?

    Yeah I should upgrade my BIOS to 10.5, currently I'm using 10.3 because previously when I used 10.5, I was unable to change the voltages but after that I realized that they can only be changed withe the +/- buttons or simply by typing them in, so I will update my BIOS and try the same voltage settings in Prime 95.

    After that, I'll run the Zip test, are there any more AVX stability tests you can recommend aside from IBT and P95?

    Thanks
    Last edited by Zach_; 06-26-2012 at 03:25 PM.
    CPU: i5 2500K @ 4.5GHz (45x100 1.35V) ~ BIOS 10.5
    Motherboard: MSI Z77A-GD65
    Memory: 2x4GB Corsair Vengeance DDR3-1600 9-9-9-24
    GPU: XFX Radeon 7950 Black Edition 3GB
    Soundcard: Native Instruments Audio 8 DJ
    HDD: WD 1TB Caviar Blue
    Cooling: Zalman CNPS10X Extreme
    PSU: Seasonic X-650 80+ Gold
    Case: Corsair Obsidian 650D

    OS: Windows 7 Ultimate x64
    Gamepad: Microsoft XBOX360 Wireless Controller + Wireless Gaming Receiver
    Wireless Set: Logitech Cordless Desktop LX710
    Monitor: LG 42LE5300 42" Led FHDTV [1080p @ 60Hz]

  7. #97
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    With Prime95, if one of the worker threads has an error, only that worker will stop and it will display an error message.
    Each of the remaining worker threads continue to run.
    The enclosed screen-shot shows that two worker threads had errors at the same time.
    The Main Thread display at the top of the window shows the starting time.
    If you get a BSOD, you can find that time of the failure from the last entry in the temperature log or get an approximate time from Prime95's Results.txt log.

    I used WhoCrashed over the weekend when I got an unexpected BSOD = 0x21.
    WhoCrashed displayed a summary of 15 BSOD's that I've had going back to early December 2010.
    FWIW, almost all of the BSOD's occurred while stress testing my overclocked settings.
    You can optionally set the number of displayed BSOD's to a different number instead of the default setting = 15.
    Resplendence Software - WhoCrashed, automatic crash dump analyzer
    Resplendence has freeware and paid versions for their programs, check them out.

    OCCT has limited AVX testing.
    I don't think that Orthos uses AVX.
    A web search using: stress test AVX might provide links to other suitable programs.

    Sample Prime95 worker thread errors:
    Z77A-GD65 + i5 2500K Overclocking - How to start?-prime95-sample-error-message-jpg
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
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    Asus VH242H 24" monitor [1920x1080]
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    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
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  8. #98
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    Thanks, I'll try again using the updated BIOS, but Jim, you have to tell me how is it possible that AVX IBT passes 4.6 with 1.37 Vcore and AVX Prime fails at 1.42, it's beyond me... I'm thinking that my Prime is bugged...
    CPU: i5 2500K @ 4.5GHz (45x100 1.35V) ~ BIOS 10.5
    Motherboard: MSI Z77A-GD65
    Memory: 2x4GB Corsair Vengeance DDR3-1600 9-9-9-24
    GPU: XFX Radeon 7950 Black Edition 3GB
    Soundcard: Native Instruments Audio 8 DJ
    HDD: WD 1TB Caviar Blue
    Cooling: Zalman CNPS10X Extreme
    PSU: Seasonic X-650 80+ Gold
    Case: Corsair Obsidian 650D

    OS: Windows 7 Ultimate x64
    Gamepad: Microsoft XBOX360 Wireless Controller + Wireless Gaming Receiver
    Wireless Set: Logitech Cordless Desktop LX710
    Monitor: LG 42LE5300 42" Led FHDTV [1080p @ 60Hz]

  9. #99
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    Quote Originally Posted by Zach_ View Post
    Thanks, I'll try again using the updated BIOS, but Jim, you have to tell me how is it possible that AVX IBT passes 4.6 with 1.37 Vcore and AVX Prime fails at 1.42, it's beyond me... I'm thinking that my Prime is bugged...
    WRONG oh misguided one.
    IBT or LinX can quickly fail after a short test using 5 - 10 loops, where Prime95, OCCT, Orthos and similar programs might not fail until many hours have elapsed. Many experienced overclockers have known about this for several years. That's why many of us use a brief IBT or LinX test only as a preliminary stress test. If either of these fails, there is no sense running Prime95 or similar tests unless you want to see which FFT size will fail.

    I've seen some posts where the OP ran IBT or LinX for 50 or 100 loops or sometimes overnight with no problems, but Prime95 would eventually fail.
    My bottom line, IBT and LinX are NOT good enough to reliably stress test your system.
    Their GFlops scores are a good indicator that shows if your system is performing at an expected level.
    My overclocked dual core P35/E6300 (R0) system maxes out at 23 GFlops.

    Even if HCI Memtest doesn't use AVX, I think that a 4 - 6 hour long test is still useful.
    Once your system appears to be stable, run your most demanding PC games with maximum stable quality settings for several hours at a time.
    It's a tough job, but someone's gotta do it.

    It's possible that Prime95 AVX has a bug.
    You should post your findings in their forum and see what the developer and others have to say.
    Last edited by profJim; 06-26-2012 at 04:31 PM.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  10. #100
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    Default Re: Z77A-GD65 + i5 2500K Overclocking - How to start?

    :)
    CPU: i5 2500K @ 4.5GHz (45x100 1.35V) ~ BIOS 10.5
    Motherboard: MSI Z77A-GD65
    Memory: 2x4GB Corsair Vengeance DDR3-1600 9-9-9-24
    GPU: XFX Radeon 7950 Black Edition 3GB
    Soundcard: Native Instruments Audio 8 DJ
    HDD: WD 1TB Caviar Blue
    Cooling: Zalman CNPS10X Extreme
    PSU: Seasonic X-650 80+ Gold
    Case: Corsair Obsidian 650D

    OS: Windows 7 Ultimate x64
    Gamepad: Microsoft XBOX360 Wireless Controller + Wireless Gaming Receiver
    Wireless Set: Logitech Cordless Desktop LX710
    Monitor: LG 42LE5300 42" Led FHDTV [1080p @ 60Hz]

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