EP-45-Ud3p (1.0) + 2x Corsair DIMM 4 GB DDR2-800 DHX startup issues

[Backstreet_Bart]

Hi Guys,

I am running (or trying to) a Gigabyte EP-45-Ud3p with 8 gb of Corsair DDR2-800 DHX. Unfortunately it doesn't work as expected.
At startup the bios beeps in short bursts (beepcode: undervoltage of the board). After I deinstall the ram - startup (long no ram beep) - power off - reinstall the ram - power on all works fine. Machine (Vista64Ultimate) runs fine and shows 8gb of ram. Reboots - soft/hard - are no problems at all. Turning the machine off and on again - no problem. Disconnecting it from power for a short while - no problem. The problem only occurs again when the machine was turned off for a while, like overnight.

I first thougt of the PSU. Bought a new one (Corsair 650W) - same issue.
Changed the Voltage of the Ram from standard (1,8v) to 2,1V - same issue.
Changed the timings of the Ram to the SPD-ones - same issue.
Changed the MCH-Core voltage to 1,2 - same issue; 1,3 same issue.
Flashed the Bios to F9 and tried above steps again - same issue.

I can't shake the feeling that I missed something important. But I can't figure it out.

Please help!

[ultraxmode]

Same issues here..

Mobo : GA-EP45-UD3P (F9 Bios)
RAM : 4x1GB Crucial Ballistix 5-5-5-15 1066Mhz.
CPU : Q9300

Tried everything.. the system restarts itself, or it goes BSOD style.. or restarts endlessly..

[morph]

Fast short beeps (about 18-20) means incorrect memory timings. You should post your BIOS values to figure out what's wrong with your settings.

[Backstreet_Bart]

Thanks for the reply. Here are my bios Values:

***DRAM Performance Control

Performance Enhace: TURBO
Extreme Memory Profile: AUTO
(g)MCH Frequency Latch: AUTO
System Memory Multiplier (SPD): AUTO
CAS: 4 AUTO
tRCD: 4 AUTO
tRP: 4 AUTO
tRAS: 12 AUTO
Advanced Timing: Made no changes there
Had this timings under BIos F8 put in manually now they are on Auto

****Motherboard Voltage Control

>>>DRAM
DRAM Voltage 2.1V
DRAM Termination 1.05V
Channel A Reference 1.05V
Channel B Reference 1.05V
(Had all this on the AUTO Settings before (1.8/0.9/0.9/0.9) - no chages


Everytime I get into the Bios Intelligent(?) Tweaker It says:

"experienced boot failures because of overclocking or changes of voltage"

Help really is appreciated! Bart

[Backstreet_Bart]

Ideas anyone?

One thing I can't figure out is why the PC boots EVERYTIME after I take out the Ram and put it in again. Seems like the BIOS must fall back on some kind of settings. What are those settings? Right now I don't care much about speed, but I don't want to crawl under my desk everytime I want to check my email