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Thread: Maximum MCH Vcore for P45?




  1. #1
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    Default Maximum MCH Vcore for P45?

    Would really like to know the maximum value for the MCH voltage.
    Figured out that it sets 1.36 volts when on AUTO for 500MHz FSB.
    I needed at least 1.28 to get into Vista, this where Orthos failed after 3 seconds.
    Tried 1.30 and now at 1.32 manually set, which is far more stable after 15 mins Orthos without an error yet....

    What have u guys running 500FSB set on MCHcore?

    I would like to hit 4Ghz by doing 8x500, since 1000mhz is the official rated speed of my Ram.

    Thanks.
    Primairy system: GA-EP45-DS4 / E8400 C0 / 2x2GB OCZ ReaperX PC8000 / Sapphire HD5870 / Creative Xfi Xtrememusic PCI / Intel Postville 160GB for OS & Programs / Antec Neopower 650w / Antec 900 / Windows7x64pro RTM (build7600)

  2. #2
    Lsdmeasap's Avatar
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    Default Re: Maximum MCH Vcore for P45?

    I use 1.24 for 450 FSB w/ 4GB w/ ram at 900. I really do not think you should need that much at all, I have ran 545 FSB with 1.32 I believe.

    Maybe you have some other voltages causing less MCH to fail for you. How much Vtt are you using, and do you have the reference voltages all on Auto? Also have you set or added and ICH voltage at all?


    Intels' rated spec is 1.21V Max (table 46) >>>
    http://www.intel.com/Assets/PDF/datasheet/319970.pdf

    Main Page
    Intelฎ P45 Express Chipset - Technical Documents

    If you do need help with your setup let me know, and post your full settings you are trying and I will advise >>>


    This is Just a template I use to ask people their settings, pay no attention to the numbers in it, replace with yours

    Code:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: 
    CPU Clock Ratio ..........................: 
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 
    
    
    Clock Chip Control 
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled] 
    CPU Host Frequency (Mhz) ............: Mhz
    PCI Express Frequency (Mhz) .........:Set to 100
    
    C.I.A.2 .................................:[Disabled]
    
    
    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 
    PCI Express Clock Drive.................: <<< 
    CPU Clock Skew (ps)....................: <<< 
    MCH Clock Skew (ps)...................: <<< 
    
    
    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 
    Memory Frequency (Mhz) ..............: 
    DRAM Timing Selectable ................: [Manual]
    
    Standard Timing Control
    CAS Latency Time........................
    tRCD .........................................
    tRP'...........................................
    tRAS..........................................
    
    Advanced Timing Control
    tRRD...........................................
    tWTR..........................................
    tWR............................................
    tRFC...........................................
    tRTP...........................................
    Command Rate (CMD) ....................:2
    
    Driving Strength Profiles
    Driving Strength ............................
    
    Channel A
    Static tRead Value.........................:7-10
     tRD Phase0 Adjustment...................:<<< Leave for all below as well
    tRD Phase1 Adjustment...................:Auto
     tRD Phase2 Adjustment .................:Auto
     tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto 
    Twr2wr(Different Rank)...................:Auto 
    Twr2rd(Different Rank)...................:Auto 
    Trd2wr(Same/Diff Rank)..................:Auto 
    Dimm1 Clock Skew Control...............:Auto  ps
    Dimm2 Clock Skew Control...............:Auto  ps
    
    Channel B
    Static tRead Value.........................:7-10
     tRD Phase0 Adjustment...................:<<< Leave for all below as well
    tRD Phase1 Adjustment...................:Auto
     tRD Phase2 Adjustment .................:Auto
     tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto 
    Twr2wr(Different Rank)...................:Auto 
    Twr2rd(Different Rank)...................:Auto 
    Trd2wr(Same/Diff Rank)..................:Auto 
    Dimm1 Clock Skew Control...............:Auto  ps
    Dimm2 Clock Skew Control...............:Auto  ps
    
    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................:
    CPU Termination…..... 1.200V*.......: <<< Leave
    CPU PLL…………………....1.500V*.......: << Please set to stock, Auto overvolts this way to much
    
    CPU Referen.…………....0.755V*.......: <<< .64% Of Vtt (Termination above) Auto Will set this correctly 
    
    CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above) Auto Will set this correctly 
    
    MCH/ICH
    MCH Core…………….....1.100V...........: << 
    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.550V............: <<< Leave
    ICH Core…………...……1.100V............: <<< Leave
    
    DRAM
    DRAM Voltage ……....1.800V............: 
    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave
    
    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled] Enabled if you use Vmware/Virtual PC
    
    Integrated Peripherals
    Legacy USB Storage Detect ..............[Disabled] *Note* Must be enabled to flash from USB
    I did answer your other post about Auto Voltages as well, incase you could not find it >>>
    http://forums.tweaktown.com/f69/p45-...me-help-28529/

  3. #3
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    Default Re: Maximum MCH Vcore for P45?

    Your input is appreciated again, it may be said!
    Ill fill in your template now to give u a clear overview of the current settings i am trying for 500 fsb:


    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: <---- have set AUTO / Off
    CPU Clock Ratio ..........................: <---- have set 7x
    Fine CPU Clock Ratio.....................:.0 <---- no half multiplier used
    CPU Frequency ...........................: <---- currently 3.5GHz


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: Mhz
    PCI Express Frequency (Mhz) .........:Set to 100

    C.I.A.2 .................................:[Disabled]


    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800mV
    PCI Express Clock Drive.................: <<< 900mV
    CPU Clock Skew (ps)....................: <<< 0ps
    MCH Clock Skew (ps)...................: <<< 0ps


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [Auto] <---- have set 400mhz (highest setting)
    System Memory Multiplier ..............: <---- have set 2.000D
    Memory Frequency (Mhz) ..............: (800 / 1000)
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................ have set 5
    tRCD ......................................... have set 5
    tRP'........................................... have set 5
    tRAS.......................................... have set 18

    Advanced Timing Control
    tRRD........................................... left it AUTO
    tWTR.......................................... left it AUTO
    tWR............................................ left it AUTO
    tRFC........................................... left it AUTO
    tRTP........................................... left it AUTO
    Command Rate (CMD) ....................:2

    Driving Strength Profiles
    Driving Strength ............................

    Channel A
    Static tRead Value.........................:7-10 <---- left it AUTO
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto ps
    Dimm2 Clock Skew Control...............:Auto ps

    Channel B
    Static tRead Value.........................:7-10 <---- left it AUTO
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto ps
    Dimm2 Clock Skew Control...............:Auto ps

    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: <---- have set 1.35V
    CPU Termination…..... 1.200V*.......: <<< Leave <---- have set 1.32V
    CPU PLL…………………....1.500V*.......: << Please set to stock, Auto overvolts this way to much <---- have set 1,5V

    CPU Referen.…………....0.755V*.......: <<< .64% Of Vtt (Termination above) Auto Will set this correctly

    CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above) Auto Will set this correctly

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.3V
    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.550V............: <<< Leave
    ICH Core…………...……1.100V............: <<< Leave

    DRAM
    DRAM Voltage ……....1.800V............: <---- have set 1.9V
    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave

    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled] Enabled if you use Vmware/Virtual PC

    Integrated Peripherals
    Legacy USB Storage Detect ..............[Disabled] *Note* Must be enabled to flash from USB</pre>

    --------------------------------------------------------------

    As you can see here i am using 1.32V CPUvvt, reference voltages are left AUTO since these are set correctly as far as I know. Didn't add any voltage to the Southbridge, this is left AUTO aswell since it doesn't add here if AUTO set.

    Currently running 7x500 for 3.5 Ghz. First need to get this FSB stable, next I will turn multiplier to 8 and get that stable.
    Have 1.35vcore which should be more than enough for the moment, since i have 9x400 stable @ 1.225 set (which is the normal rated voltage for the cpu, so this is good).

    I ran memtest over 10 hours with current settings shown in template, resulting in 0 errors. So memory itself seems ok (like it should be since it's rated to run this speed originally), good that it only needs 1.9v.

    Allthough memtest is stable, Orthos crashes after like ~1hour.
    Vcore shouldn't be the issue since ํ've given this a boost to an acceptable 1.35v which it surely won't need for 3.5GHz (maybe for 500fsb?!, don't think so either).
    Last edited by MadDoGz; 11-13-2008 at 12:30 AM.
    Primairy system: GA-EP45-DS4 / E8400 C0 / 2x2GB OCZ ReaperX PC8000 / Sapphire HD5870 / Creative Xfi Xtrememusic PCI / Intel Postville 160GB for OS & Programs / Antec Neopower 650w / Antec 900 / Windows7x64pro RTM (build7600)

  4. #4
    Lsdmeasap's Avatar
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    Default Re: Maximum MCH Vcore for P45?

    Please post me a link to your ram so I can check warrantied voltages. Either way 1.9 may not be enough for 1000Mhz

    Try this for what you have >>>


    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Auto or Fast
    CPU Clock Ratio ..........................: <---- have set 7x
    Fine CPU Clock Ratio.....................:.0 <---- no half multiplier used
    CPU Frequency ...........................: <---- currently 3.5GHz


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 500Mhz
    PCI Express Frequency (Mhz) .........:Set to 100

    C.I.A.2 .................................:[Disabled]


    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800mV
    PCI Express Clock Drive.................: <<< 900mV
    CPU Clock Skew (ps)....................: <<< 50ps
    MCH Clock Skew (ps)...................: <<< 50-150ps


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [Auto] << Can be left in Auto and just choose the strap letter below B is 333, D is 400 (Use D)

    System Memory Multiplier ..............: 2.000D
    Memory Frequency (Mhz) ..............: 1000
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................ 5
    tRCD ......................................... 5
    tRP'........................................... 5
    tRAS.......................................... 15/ 18

    Advanced Timing Control
    tRRD...........................................3-5
    tWTR.......................................... 3-6
    tWR............................................ 4-6
    tRFC...........................................52-65
    tRTP........................................... 3-5
    Command Rate (CMD) ....................:2

    Driving Strength Profiles
    Driving Strength ............................ 1066 or 1200 (Why did you not fill this in? Are you using the latest BIOS? If so, did you load/save/apply optimized defaults? If yes for all that and you still do not see this that is strange, you may have to use the hotkey. Press Control + F1 on the MAIN Page of the BIOS and then go in MIT and see if you find this

    Channel A
    Static tRead Value.........................:9-12 (for 400 MCH/D Strap)
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto ps
    Dimm2 Clock Skew Control...............:Auto ps

    Channel B
    Static tRead Value.........................:9-12 (for 400 MCH/D Strap)
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto ps
    Dimm2 Clock Skew Control...............:Auto ps

    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: <---- have set 1.35V << You may need to set way more here as what you set in the BIOS is not what you get in windows. So be sure to check the difference with CPU-z. Maybe 1.3-1.34 actual for 500 FSB

    CPU Termination…..... 1.200V*.......: <<< 1.32-1.36
    CPU PLL…………………....1.500V*.......: << Please set to stock, Auto overvolts this way to much <---- have set 1,5V

    CPU Referen.…………....0.755V*.......: <<< .64% Of Vtt (Termination above) Auto Will set this correctly

    CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above) Auto Will set this correctly

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.24-1.3V
    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.550V............: <<<1.55-1.6
    ICH Core…………...……1.100V............: <<< 1.1-1.2

    DRAM
    DRAM Voltage ……....1.800V............: <---- have set 1.9V 2.0-2.1
    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave
    Last edited by Lsdmeasap; 11-14-2008 at 01:04 PM.

  5. #5
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    Default Re: Maximum MCH Vcore for P45?

    OCZ Technology | Products | Memory | OCZ PC2-8000 ReaperX HPC 4GB Edition

    Thats the RAM i use.
    When i set 1.9v it seems stable after 20 passes of MemTest v2.01.
    Not a single error.

    Is it possible the RAM causes Orthos to crash, even if MemTest doesnt come up with any error's at all??

    Thanks.
    Last edited by MadDoGz; 11-15-2008 at 03:17 AM.
    Primairy system: GA-EP45-DS4 / E8400 C0 / 2x2GB OCZ ReaperX PC8000 / Sapphire HD5870 / Creative Xfi Xtrememusic PCI / Intel Postville 160GB for OS & Programs / Antec Neopower 650w / Antec 900 / Windows7x64pro RTM (build7600)

  6. #6
    Lsdmeasap's Avatar
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    Default Re: Maximum MCH Vcore for P45?

    It IS possible but not likely that Memtest will pass but not orthos. What you can do to be sure it run Orthos Small or Large FFT's and that will test the CPU only then you will know for sure but it is sounding to me like you need some voltage adjustments such as I suggeted above

    And just so you know your ram is rated up to 2.1, and max under warranty is 2.15 so you can for sure use at least 2.0-2.1. Even though your ram passes memtest I would advise you use/test using at least 2.0. But to see if that is the issue you would need to change only the ram voltage and test first, But I dont think it is the issue I think you need to adjust more vcore and Vtt and maybe try less MCH

  7. #7
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    Default Re: Maximum MCH Vcore for P45?

    I thought i was done with 4Ghz, but after all I seem to have a small but very strange issue!
    I got everything stable with the settings showed in the attached screenshot.
    As you can see its all Orthos stable over 24 hours. I did 20 memtest passes aswell, also resulting in 0 errors

    My point is all about tRD 9.
    I can conclude if i run tRD 9 with those settings everything is perfectly stable.
    But i also run another profile (3.6ghz), when i try switching back to this 4ghz profile after doing another i cant get it to post @ tRD 9.

    Tried many different things such as bumping the RAM voltage, it posts only very rarely (like 1 out of 20 times) for a first time on tRD9 @ 500 fsb.
    Even more stupid is that when it DOES post on tRD 9, all other boots succeed once the first is succesfully done/set.

    tRD 10 always posts.

    Any way to get around this since i want to run tRD 9 (its give's about +300mb readspeed and -2Ns latency).

    Need help on this strange issue.
    Thanks!
    Attached Images Attached Images Maximum MCH Vcore for P45?-4ghz-prime-stable-jpg 
    Last edited by MadDoGz; 11-20-2008 at 12:49 AM.
    Primairy system: GA-EP45-DS4 / E8400 C0 / 2x2GB OCZ ReaperX PC8000 / Sapphire HD5870 / Creative Xfi Xtrememusic PCI / Intel Postville 160GB for OS & Programs / Antec Neopower 650w / Antec 900 / Windows7x64pro RTM (build7600)

  8. #8
    Lsdmeasap's Avatar
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    Default Re: Maximum MCH Vcore for P45?

    Which MCH Latch are you using? How much MCH voltage? You may just need to add a bit more MCH Voltage or a vtt bump so that all ref voltages adjust a little

  9. #9
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    Default Re: Maximum MCH Vcore for P45?

    Quote Originally Posted by Lsdmeasap View Post
    Which MCH Latch are you using? How much MCH voltage? You may just need to add a bit more MCH Voltage or a vtt bump so that all ref voltages adjust a little
    2.00D Latch
    1.32v MCH voltage (1.30 causes Orthos to crash in a short time)
    1,34 VTT

    Again, its 100% stable, just problems POSTing it after it is set.
    If first POST succeeds after tRD9 is set (this is only like 1 out of 10 times), the following POSTs go without any problem.... That until i run my 3.6ghz profile and want to switch back to 4ghz profile again. Then the trouble kicks in again with tRD 9.

    Very very strange!
    Last edited by MadDoGz; 11-20-2008 at 05:53 PM.
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  10. #10
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