Question : Problem: ASUS Maximus II Formula Det DRAM

Hello Everyone,

After googling during this last week I know now that several people are facing similar problems although any help will be very appreciate.

The problem started as soon I built the computer. It was hanging at Init ROM. I've noticed that pressing the Power reset button the system starts correctly however after two days the system began to hang at Det DRAM and only starts after several resets and/or Power On/Off.

Until now the only thing I tried in the BIOS was to switching ram to white slots and changing ram timing and voltage from to 5-5-5-18-2T (Auto) to 5-5-5-15-2T with 2.1v. I also tried to change the battery and to not connect any fans into the MB according to some posts I've read. Didn't work.

After upgraded the BIOS to the latest version 1901 everything on BIOS is as factory Defaults. The only thing I've disabled was the Floppy, the Lan 2 and IEEE 1394 which are things I don't use but even with the factory defaults the problem persists.

When I manage to get into Windows I can let the computer on for days without any issue. It is pretty fast and stable.

Here are some information that I got from Sandra and CPU-Z regarding Memory

Sandra:

Memory Module(s)
Memory Module : Corsair CM2X2048-8500C5D 2GB DIMM DDR2 PC2-6400U DDR2-800 (5.0-5-5-18 3-23-6-3)
Memory Module : Corsair CM2X2048-8500C5D 2GB DIMM DDR2 PC2-6400U DDR2-800 (5.0-5-5-18 3-23-6-3)

CPU-Z

This is correct? I mean, take a look at slot 2 and 4. It says my Memory Max Bandwidth is PC6400 (400MHZ).

http://www.uploadgeek.com/uploads456/0/CPU-Z.jpg

Last Notes:

When I manage to get into Windows I can let the computer on for days without any issue. It is pretty fast and stable.

Thanks in Advance

Johnny

Answer : Problem: ASUS Maximus II Formula Det DRAM

>> change the settings to 5-5-5-15-2T  

Yes, but I thought you were going in the wrong direction. Dropping from 18 to 15 makes the ram run 'faster' (aka: tighter timings).
The higher the ram speed usually the 'looser' the timings need to be.
The specs I found since then say that these are rated for 1066 @ 5-5-5-18-2T @ 2.1v.

Wait a second, most mobos I have seen need to have the bus speed manually set to for ram 1066MHz and above. For some reason the bios wants to set it at 800MHz
Try manually setting them to 1066MHz 5-5-5-15- 2T @ 2.1v (their specs as far as I can tell).
If they keep dropping down to 800, try 6-6-6-15/18-2T
If they are still flaky on boot, add .05 volts (point zero-five) at a time, up to a MAX of 2.3v. Hopefully you won't need to do this or at least stop by 2.2v