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I gave up on the quest for 3.8GHz on the E7400 and settled for a stable 3.6GHz. Used the Intel Burn Test utility to quickly zero in on the needed settings. Be careful if you use this tool as it runs MUCH hotter than Prime95. You need to have CoreTemp running and monitor the temps. The up side is you can do in minutes what otherwise would take hours. I will admit I'm midway though a 24-hour Prime95 test as this is the first time I used Intel Burn. It is looking good but will report back if any changes.
A few of things I learned about my E7400 & P43 motherboard:
- Few people on the planet are trying to overclock this setup - with good reason!
- Ignore the CPU TCase temp and use a utility like CoreTemp or Hardware Monitor to watch the TJunction (core) readings.
- With excessive Vcore, the BIOS starts to get flakey and forget some settings. Also, Windows drivers would disappear, USB ports shut down, etc.
- If you can't decide between buying a P43 or a P45 and want to overclock, go with the P45. I own one of each and wish both were P45's.
- I also should have done my homework and gone with an E5xxx or E8xxx CPU. Live and learn.
The P43 BIOS has fewer settings than the P45 and voltage adjustments are not as fine. I'm running a 455MHz FSB on my P45. No way I could touch that with the P43.
Hope this is helpful to someone.
Motherboard: Gigabyte EP43-UD3L
Processor: Intel Core 2 Duo E7400 (2.8 GHz) 1.2625v
RAM: Crucial Ballistix DDR2 800MHz (4 x 1GB) 2.0v
PSU: OCZ StealthXtreme 600w
MB Intelligent Tweaker (M.I.T.)
Robust Graphics Booster ........... : [Auto]
CPU Clock Ratio ......................... : [9 X]
Fine CPU Clock Ratio.................. : [+0.0]
CPU Frequency ............................: 3.60 GHz (400 x 9)
********Clock Chip Control**********
>>>>>Standard Clock Control
CPU Host Clock Control...............: [Enabled]
CPU Host Frequency (Mhz) .........: [400]
PCI Express Frequency (Mhz) ......: [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.....................: [Disabled]
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: [2.00B]
Memory Frequency (Mhz) ..............: 800
DRAM Timing Selectable ................: [Manual]
>>>>>Standard Timing Control
CAS Latency Time...........................: [4]
tRCD ...............................................: [4]
tRP'.............................................. ....: [4]
tRAS.............................................. ...: [12]
>>>>>Advanced Timing Control [Press Enter]
tRRD.............................................. .: [3]
tWTR.............................................. .: [3]
tWR............................................... ..: [6]
tRFC.............................................. ..: [52]
tRTP.............................................. ..: [3]
Command Rate (CMD) .................. [2]
Channel A & B Timing Settings [Press Enter]
Static tRead Value.........................: [9]
tRD Phase0 Adjustment...............: [Auto]
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]
Dimm2 Clock Skew Control........: [Auto]
Driving Strength Profiles
Driving Strength ...........................: [1066]
****Motherboard Voltage Control***
CPU Vcore........(1.2625v)............: [1.36250v]
CPU Termination..........................: [1.200v]
CPU Reference............................: [Auto]
MCH/ICH
MCH Core..................................: [1.200v]
ICH I/O........................................: [1.550v]
DRAM
DRAM Voltage........................... : [2.00v]
Advanced BIOS 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]
Integrated Peripherals
USB Storage Function ..................: [Disabled]
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A few of things I learned about my E7400 & P43 motherboard:
- Few people on the planet are trying to overclock this setup - with good reason!
- Ignore the CPU TCase temp and use a utility like CoreTemp or Hardware Monitor to watch the TJunction (core) readings.
- With excessive Vcore, the BIOS starts to get flakey and forget some settings. Also, Windows drivers would disappear, USB ports shut down, etc.
- If you can't decide between buying a P43 or a P45 and want to overclock, go with the P45. I own one of each and wish both were P45's.
- I also should have done my homework and gone with an E5xxx or E8xxx CPU. Live and learn.
The P43 BIOS has fewer settings than the P45 and voltage adjustments are not as fine. I'm running a 455MHz FSB on my P45. No way I could touch that with the P43.
Hope this is helpful to someone.
Motherboard: Gigabyte EP43-UD3L
Processor: Intel Core 2 Duo E7400 (2.8 GHz) 1.2625v
RAM: Crucial Ballistix DDR2 800MHz (4 x 1GB) 2.0v
PSU: OCZ StealthXtreme 600w
MB Intelligent Tweaker (M.I.T.)
Robust Graphics Booster ........... : [Auto]
CPU Clock Ratio ......................... : [9 X]
Fine CPU Clock Ratio.................. : [+0.0]
CPU Frequency ............................: 3.60 GHz (400 x 9)
********Clock Chip Control**********
>>>>>Standard Clock Control
CPU Host Clock Control...............: [Enabled]
CPU Host Frequency (Mhz) .........: [400]
PCI Express Frequency (Mhz) ......: [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.....................: [Disabled]
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: [2.00B]
Memory Frequency (Mhz) ..............: 800
DRAM Timing Selectable ................: [Manual]
>>>>>Standard Timing Control
CAS Latency Time...........................: [4]
tRCD ...............................................: [4]
tRP'.............................................. ....: [4]
tRAS.............................................. ...: [12]
>>>>>Advanced Timing Control [Press Enter]
tRRD.............................................. .: [3]
tWTR.............................................. .: [3]
tWR............................................... ..: [6]
tRFC.............................................. ..: [52]
tRTP.............................................. ..: [3]
Command Rate (CMD) .................. [2]
Channel A & B Timing Settings [Press Enter]
Static tRead Value.........................: [9]
tRD Phase0 Adjustment...............: [Auto]
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]
Dimm2 Clock Skew Control........: [Auto]
Driving Strength Profiles
Driving Strength ...........................: [1066]
****Motherboard Voltage Control***
CPU Vcore........(1.2625v)............: [1.36250v]
CPU Termination..........................: [1.200v]
CPU Reference............................: [Auto]
MCH/ICH
MCH Core..................................: [1.200v]
ICH I/O........................................: [1.550v]
DRAM
DRAM Voltage........................... : [2.00v]
Advanced BIOS 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]
Integrated Peripherals
USB Storage Function ..................: [Disabled]
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