OCN2
Results 1 to 9 of 9

Thread: E8500 Won't Pass IBT > 4.0ghz (Need Help)

  1. #1
    Xtreme Enthusiast
    Join Date
    Dec 2007
    Location
    North Carolina, USA
    Posts
    965

    E8500 Won't Pass IBT > 4.0ghz (Need Help)

    So I have had my E8500@4.5ghz 1.45V, but I never tested it on IBT until last night. I clocked it up to 4.2ghz (525x8) 1.35V and it would only pass 80% of IBT no matter what voltages I tried. However I can run 4.0ghz @ 1.23V and IBT doesn't even get the chip up to 70C after 40 passes, so I don't understand why with all that voltage increase I can't pass IBT 100%...

    My Voltage settings @4.2ghz were:

    CPU: 1.35V
    DDR: 2.3V
    Chipset: +0.250V (1.36V)
    FSB: +0.250V (1.33V)
    CPU 1 GTL: 0.63VTT
    CPU 2 GTL: 0.63VTT
    MCH GTL: 0.59VTT
    CPU PLL: 1.6V

    FSB/NB Latch: 1333mhz
    PCI-E Freq: 100
    GPU Clock Skew: 200ps
    MCH Clock Skew: 300ps
    CPU Clock Driving Control: 900mV


    My RAM is running at 1050mhz (1066 Rated) and my PL is at 12T

    I chose my hardware for this system based around max OCing and I know this board can easily push the E8500 to 4.5ghz and beyond, but IBT doesn't like it over 4.0ghz.

    Does anyone have any idea what I can try to get a stable IBT run @4.2ghz based on the settings above? Or any ideas in general will be appreciated.
    Last edited by LedHed; 03-12-2009 at 03:36 PM.
    CPU: Intel i5-3570K @ 4.2ghz (1.064V)
    GPU: SLI ASUS GTX 660 Ti DCII 2GB @ 1215/7012
    LCD: BenQ XL2420TE (144Hz)
    Mobo: ASRock Z77 Extreme6
    Sound: SoundBlaster ZXR + Yamaha RX-V863 (LPCM) + Polk Audio Monitor Series II Speakers
    RAM: G.SKILL Sniper Series DDR3 2133 4x4GB
    Storage: Samsung 840 Pro 128GB + 1TB Seagate Barracuda +1TB WD Black Caviar
    PSU: Corsair HX 750W 80+ Silver (62A)
    UPS: Cyberpower CP1200AVR (720W)
    OS: Microsoft Windows 7 Ultimate x64
    Cooling: Corsair 650D + TT Water2.0 Pro + 2x Silverstone FM121

  2. #2
    Xtreme Member
    Join Date
    Jul 2003
    Location
    Omak, WA
    Posts
    248
    So if your temps get to 70c @ 1.23v, what are the temps getting to at higher voltage..... I think the C2D's stat to throttle down at around 72.5 IIRC, or close to that.
    eVGA P67 FTW K2, i7 2600K, 2x4gb G.Skill RipJaws DDR3 1866, 2x eVGA GTX260 SSC Edition SLI, Corsair 700D w/800D Window, Corsair TX850W PSU, 2X WD Sata 6 1TB Blacks Raid0, LG GH22LS30 SATA DVDRW, Swiftech Apogee XT R2 CPU Block, Alphacool Laing DDC-Pump w/Ultra Water Tank, Black Ice Extreme 360 Radiator, Windows 7 X64

    Lvcoyote's Blog Spot
    Heatware

  3. #3
    Xtreme Enthusiast
    Join Date
    Dec 2007
    Location
    North Carolina, USA
    Posts
    965
    Well when I pushed it to 1.38V it hit as high as 85C, but even when it stayed under 80C IBT still was saying 80% passed.

    Also what are you talking about throttling at 72.5C? People are pushing 45nm Wolfdales to 80C all the time under IBT and they are completely fine with 100% pass.
    CPU: Intel i5-3570K @ 4.2ghz (1.064V)
    GPU: SLI ASUS GTX 660 Ti DCII 2GB @ 1215/7012
    LCD: BenQ XL2420TE (144Hz)
    Mobo: ASRock Z77 Extreme6
    Sound: SoundBlaster ZXR + Yamaha RX-V863 (LPCM) + Polk Audio Monitor Series II Speakers
    RAM: G.SKILL Sniper Series DDR3 2133 4x4GB
    Storage: Samsung 840 Pro 128GB + 1TB Seagate Barracuda +1TB WD Black Caviar
    PSU: Corsair HX 750W 80+ Silver (62A)
    UPS: Cyberpower CP1200AVR (720W)
    OS: Microsoft Windows 7 Ultimate x64
    Cooling: Corsair 650D + TT Water2.0 Pro + 2x Silverstone FM121

  4. #4
    Xtreme Member
    Join Date
    Jul 2003
    Location
    Omak, WA
    Posts
    248
    I'm just quoting the thermal specs of that processor, if you have a EO stepping.....74.1c
    http://processorfinder.intel.com/det...x?sSpec=SLB9K#

    CO Stepping...... 72.4c
    http://processorfinder.intel.com/det...x?sSpec=SLB9K#

    It's not uncommon for you to see stability issues when the thermal spec has been reached or exceeded. What kind of cooling are you using??
    eVGA P67 FTW K2, i7 2600K, 2x4gb G.Skill RipJaws DDR3 1866, 2x eVGA GTX260 SSC Edition SLI, Corsair 700D w/800D Window, Corsair TX850W PSU, 2X WD Sata 6 1TB Blacks Raid0, LG GH22LS30 SATA DVDRW, Swiftech Apogee XT R2 CPU Block, Alphacool Laing DDC-Pump w/Ultra Water Tank, Black Ice Extreme 360 Radiator, Windows 7 X64

    Lvcoyote's Blog Spot
    Heatware

  5. #5
    Xtreme Enthusiast
    Join Date
    Dec 2007
    Location
    North Carolina, USA
    Posts
    965
    Cooling:



    (Antec 900 + Tuniq Tower 120)



    During any kind of normal load like Crysis:WH for 4 hours I never break 60C, only IBT brings out these kind of temps and I was under the impression that they are completely normal under IBT.

    The only way I could get higher performance cooling is by going water, but for now I'm sticking with high end air.
    CPU: Intel i5-3570K @ 4.2ghz (1.064V)
    GPU: SLI ASUS GTX 660 Ti DCII 2GB @ 1215/7012
    LCD: BenQ XL2420TE (144Hz)
    Mobo: ASRock Z77 Extreme6
    Sound: SoundBlaster ZXR + Yamaha RX-V863 (LPCM) + Polk Audio Monitor Series II Speakers
    RAM: G.SKILL Sniper Series DDR3 2133 4x4GB
    Storage: Samsung 840 Pro 128GB + 1TB Seagate Barracuda +1TB WD Black Caviar
    PSU: Corsair HX 750W 80+ Silver (62A)
    UPS: Cyberpower CP1200AVR (720W)
    OS: Microsoft Windows 7 Ultimate x64
    Cooling: Corsair 650D + TT Water2.0 Pro + 2x Silverstone FM121

  6. #6
    Xtreme Member
    Join Date
    Jul 2003
    Location
    Omak, WA
    Posts
    248
    Do you have EIST and C1E enabled in BIOS??? If so you can try disabling those. But I do not recommend running your CPU in the 80c range for any period of time....
    eVGA P67 FTW K2, i7 2600K, 2x4gb G.Skill RipJaws DDR3 1866, 2x eVGA GTX260 SSC Edition SLI, Corsair 700D w/800D Window, Corsair TX850W PSU, 2X WD Sata 6 1TB Blacks Raid0, LG GH22LS30 SATA DVDRW, Swiftech Apogee XT R2 CPU Block, Alphacool Laing DDC-Pump w/Ultra Water Tank, Black Ice Extreme 360 Radiator, Windows 7 X64

    Lvcoyote's Blog Spot
    Heatware

  7. #7
    Xtreme Old School Moderator
    Join Date
    Sep 2002
    Location
    Portugal
    Posts
    1,670
    Moved - post in the wrong section !!!

    Please read this - http://www.xtremesystems.org/forums/...d.php?t=219716


  8. #8
    Xtreme Member
    Join Date
    Dec 2008
    Location
    Melbourne, Australia
    Posts
    269
    Those kinda temps you only see on unlapped CPU's. Mine was above 70 until i lapped it (E8400 @ 4.3ghz), then once i did it dropped nearly 10-12 degrees as the plate is FAR from even. I was shocked at how uneven it was to be honest and fully explains my crazy temp
    CPU: E8400 E0 (Cooled By OCZ Vendetta 2) @ 4.3ghz/1.296vcore
    Motherboard: GB EP45-DS4P BIOS F8
    Memory: OCZ DDR2 PC2-8500 (1066mhz) 2x2gig - & Corsair Dominator RAM cooler
    Graphic: PowerColor PCS+ HD4890
    HDD: 2x WD 640GB, 1x Maxtor 180GB

  9. #9
    Registered User
    Join Date
    Mar 2008
    Posts
    18
    My bet is that someone is talking Tcase and the other person is talking Tjunction temperatures here...
    Gigabyte GA-P35-DS3P
    Xeon E3120 + TRUE + IFX-10
    4 GB Corsair Dominator 1066
    Gigabyte GTX260 OC
    WDC WD800JD-08LSA0 x 2 (Raid 0)
    WDC WD2500JS-75NCB1
    Cooler Master HAF932
    Antec Neopower 650W PSU
    Samsung 2493HM 24" LCD

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •