Maximum MCH Vcore for P45?

[MadDoGz]

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.

[Lsdmeasap]

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


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

[b][u]MB Intelligent Tweaker(M.I.T.)[/u][/b]
Robust Graphics Booster ...............: 
CPU Clock Ratio ..........................: 
Fine CPU Clock Ratio.....................:.0
CPU Frequency ...........................: 


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

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


[b][u]Advanced Clock Control [Press Enter][/u][/b]
CPU Clock Drive...........................: <<< 
PCI Express Clock Drive.................: <<< 
CPU Clock Skew (ps)....................: <<< 
MCH Clock Skew (ps)...................: <<< 


[b][u]DRAM Performance Control[/u][/b][u][/u]
[B]Performance Enhance...................: [STANDARD][/B]
Extreme Memory Profile (X.M.P.).....: Disabled
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: 
Memory Frequency (Mhz) ..............: 
DRAM Timing Selectable ................: [Manual]

[b]Standard Timing Control[/b]
CAS Latency Time........................
tRCD .........................................
tRP'...........................................
tRAS..........................................

[b][u]Advanced Timing Control[/u][/b]
tRRD...........................................
tWTR..........................................
tWR............................................
tRFC...........................................
tRTP...........................................
Command Rate (CMD) ....................:2

[u][b]Driving Strength Profiles[/b][/u][b][/b]
Driving Strength ............................

[b]Channel A[/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

[b]Channel B[/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

[b][U]Motherboard Voltage Control[/U][/b][U][/U]
Voltage Type.………... Manual
[b]CPU[/b]
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 

[b]MCH/ICH[/b]
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

[b][U]Advanced Settings[/U][/b][U][/U]
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

[b][U]Integrated Peripherals[/U][/b][U][/U]
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-boards-tries-fry-cpus-500fsb-could-use-some-help-28529/

[MadDoGz]

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

[Lsdmeasap]

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

[MadDoGz]

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.

[Lsdmeasap]

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

[MadDoGz]

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!

[Lsdmeasap]

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

[MadDoGz]

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

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!

[Lsdmeasap]

Re: Maximum MCH Vcore for P45?

Try 1.36 Vtt

Or just keep using 4Ghz!

[MadDoGz]

Re: Maximum MCH Vcore for P45?

Try 1.36 Vtt

Or just keep using 4Ghz!

Already tried that mate :)
Guess i'll have to stick to tRD 10 then with 4GHz, since i want to be able to switch between 9x400 and 8x500.

Perhaps a future BIOS update will adress this issue since it really seems to be related to that.

One of these days I will do benchmarks to show the difference between those 2 profiles i use.

Most important differences in short:
9x400 4-4-4-10 tRFC42 tRD8
8x500 5-5-5-15 tRFC54 tRD10

[Lsdmeasap]

Re: Maximum MCH Vcore for P45?

Did you try older BIOS then if you think that may be part of the issue?

You should also add 399x400 tRD 7 MCH 400 and 399x400 tRD 7 MCH 333 to that list of bench comparisons