EP45-DS3L Cold Boot reboot

[Biskquik]

I was cleaning out my case today and noticed something interesting when I plugged back in my system. When I turned on the power, it would start for about a second, turn off then turn back on again and do all the boot procedures. It will work fine if it's shut down and the power supply is still warm. This only occurs when the PSU is turned off then turned back on.

This is the first time its been happening, though I began overclocking my computer about 4 days ago and got it to 3.0ghz without much problems, after referring to other threads here and other forums. I'm wondering if this cold boot symptom is more setting related than PSU related since this happened post OC.

I know that the system may shutdown once and reboot if voltage settings are changed in the BIOS but having it shutdown then reboot pushing the on button seems to be something of concern. I've tried a couple options:

1. Reloading optimized defaults, reboot, then reapplying my settings. No impact.
2. Disabling C1E and EIST. No impact.

System Config:
Intel Q6600 (OC'd to 3.0ghz)
Arctic Cooling Freezer 7 Pro
EP45-DS3L
2*2GB G.Skill DDR2 1000
Corsair 520HX
ATi Radeon HD4850 512MB
1 Seagate 7200.11 1TB (not affected by the bad firmware yay)
1 Seagate 7200.7 250GB

I may try reloading the F10 BIOS later if recommended. Below are my settings

MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Fast
CPU Clock Ratio ..........................: 9
Fine CPU Clock Ratio.....................:.0
CPU Frequency ...........................: 3.00Ghz


Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Enabled]
CPU Host Frequency (Mhz) ............: 333
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)....................: 50ps
MCH Clock Skew (ps)...................: 100ps


DRAM Performance Control
Performance Enhance...................: [STANDARD]
Extreme Memory Profile (X.M.P.).....: Disabled
(G)MCH Frequency Latch...............: [333mhz]
System Memory Multiplier ..............: 2.40B (Note: I've tried 3.20B [1000mhz effective] but I can't seem to get it stable even with my G.Skill DDR2 1000 set)
Memory Frequency (Mhz) ..............: 800Mhz
DRAM Timing Selectable ................: [Manual]

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

Advanced Timing Control
tRRD...........................................4
tWTR..........................................6
tWR............................................66
tRFC...........................................57
tRTP...........................................5
Command Rate (CMD) ....................:2

Driving Strength Profiles
Driving Strength ............................800mhz

Channel A
Static tRead Value.........................:8
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 ps
Dimm2 Clock Skew Control...............:Auto ps

Channel B
Static tRead Value.........................:8
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 ps
Dimm2 Clock Skew Control...............:Auto ps

Motherboard Voltage Control
Voltage Type.………... Manual
CPU
CPU Vcore….………........1.28750V.................:1.2875 0V
CPU Termination…..... 1.200V.......: 1.2V
CPU PLL…………………....1.500V.......: 1.55V
CPU Reference.…………....0.805V........: Auto

MCH/ICH
MCH Core…………….....1.100V...........: 1.2V
MCH Reference….…….0.800V...........; Auto
ICH I/O……………….....1.550V............: Auto

DRAM
DRAM Voltage ……....1.800V............: 1.8V

Advanced Settings
Limit CPUID Max. to 3.....................: [Disabled]
No-Execute Memory Protect............: [Enabled]
CPU Enhanced Halt (C1E)................: [Enabled]
CPU Thermal Monitor 2(TM2) ...........: [Enabled]
CPU EIST Function.........................: [Enabled]
Virtualization Technology................: [Enabled]

I'm aware that my standard settings inclue C1E and EIST but the system is still stable with those settings on, though Vdroop brings it down to 1.200V under full load. The system passes 30 passes of IBT for Vcore/CPU testing and 6 hrs of Prime95 blend for FSB/mem testing.

My guess is that this symptom is benign since it doesn't reset my BIOS settings but I'd like to hear from someone like LSD just in case something is wrong with my settings or PSU.

Thanks

[Nickel020]

Re: EP45-DS3L Cold Boot reboot

This only happens when you overclock, if you set the CPU to stock speed, you won't have this "problem" anymore. This is because the northbridge changes the strap setting (internal chipset timings) from the CPUs default value to a higher OC value. If you turn off the PSU the PC will "forget" this setting and will need to reload it from the BIOS setting which again needs a reboot. This is a common thing with Intel based mainboards and has somethign to do with your exact settings combination, if you change your system memory multiplier this "problem" will likely disappear.