All, Looking for some help with an odd problem.

New system build which works great once everything warms up.

If it sits for more than 2 hours after being turned off then system fails and reboots multiple times before successfully booting and starting windows. Failures during the first few minutes can occur during POST, in BIOS, during Windows load....tends to go further and further each time.

Have run Memtest both warm and cold with similar behavior. When warm, no errors. When cold, errors for first 60-90 seconds and then no more after that. What's my best move?

EP45-UD3P
E8500 @3.16
Corsair 2X2GB PC8500 @1066
BIOS (f4) settings as below

Thanks in advance for your help.
sskings


[MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: 9
Fine CPU Clock Ratio.....................:0.5
CPU Frequency ...........................: 3.16

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
CPU Clock Drive...........................: 800
PCI Express Clock Drive.................: 900
CPU Clock Skew (ps)....................: 0
MCH Clock Skew (ps)...................: 0

DRAM Performance Control
Performance Enhance...................: [STANDARD]
Extreme Memory Profile (X.M.P.).....: Manual
MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: 2.66D
Memory Frequency (Mhz) ..............: 1066
DRAM Timing Selectable ................: [Manual]

Standard Timing Control
CAS Latency Time........................5
tRCD .........................................5
tRP'...........................................5
tRAS..........................................15
tRRD...........................................4
tWTR..........................................12
tWR............................................12
tRFC...........................................56
tRTP...........................................4
Command Rate (CMD) ....................:2

Driving Strength Profiles

Driving Strength ............................1066

Channel A
Static tRead Value.........................10
Other Settings...............................Auto

Channel B
Static tRead Value.........................10
Other Settings...............................Auto

Motherboard Voltage Control
Voltage Type.………... Manual
CPU
CPU Vcore….……….........................:Auto
CPU Termination…..... 1.200V*.......: <<< 1.20
CPU PLL…………………....1.500V*.......: << 1.50
CPU Referen.…………....0.755V*.......: <<< 0.76
MCH/ICH
MCH Core…………….....1.100V...........: << 1.26
MCH Reference….…….0.800V...........; <<< auto
MCH/DRAM Ref.…......0.900V...........: <<< auto
ICH I/O……………….....1.550V............: <<< auto
ICH Core…………...……1.100V............: <<< auto
DRAM
DRAM Voltage ……....1.800V............: 2.0
DRAM Termination .…0.900V............: <<< auto
Channel A Reference 0.900V............: <<< auto
Channel B Reference 0.900V............: <<< auto

Advanced Settings
Limit CPUID Max. to 3.....................: [Disabled]
No-Execute Memory Protect............: [Enabled]
CPU Enhanced Halt (C1E)................: [Disabled]
C2/C2E State Support....................: [Disabled]
C4/C4E State Support..................: [Disabled]
CPU Thermal Monitor 2(TM2) ...........: [Enabled]
CPU EIST Function.........................: [Disabled]
Virtualization Technology................: [Disabled]
Integrated Peripheral
Legacy USB Storage Detect ..............[Disabled]