Asus or Gigabyte MB

Presuming that you are referring to the GIGABYTE GA-M56S-S3 already mentioned,

If memory serves, *pun not intended*
The memory limitation/annoyance is caused by the nForce chipset.

If familiar/comfortable with the process,
Update the mobo BIOS to current,
Using only one memory module in the system.
And as usual,
Clear CMOS after BIOS flash
and then
Set requirements/preferences in CMOS/BIOS menu.
Remember to set memory module voltage... along with the other items,
Shut the system down,
Remove power cord from any power source,
Install remaining three memory modules,
Reconnect power cord to power source,
Boot system,
Double check/verify all CMOS/BIOS menu settings...

IF system boots and all is in order,
Feel free to rant and curse nVIDIA.
IF system fails to boot and/or recognize all memory modules,
Feel free to rant and curse at nVIDIA and GIGABYTE.

That is the MB model.
I have already updated the bios but with ram in 1 and 3 slots.
I will trty and nut out the rest of it.

Your manual mentions enabling dual channel ram in the BIOS. Have you done this?

Also it says to use the same brand of ram. Another thing to check would be the compatibility of this ram for that motherboard.

I tried this and still no go on 3 and 4 slots. I also tried the voltage on auto and 2.0v No go
There is no way in the bios to manualy engage dual chanel as photolady suggested it is all auto detect.
I have sent a question to gigabyte.
No answer as yet/

Quote:

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Originally Posted by Shinma

Presuming that you are referring to the GIGABYTE GA-M56S-S3 already mentioned,

If memory serves, *pun not intended*
The memory limitation/annoyance is caused by the nForce chipset.

If familiar/comfortable with the process,
Update the mobo BIOS to current,
Using only one memory module in the system.
And as usual,
Clear CMOS after BIOS flash
and then
Set requirements/preferences in CMOS/BIOS menu.
Remember to set memory module voltage... along with the other items,
Shut the system down,
Remove power cord from any power source,
Install remaining three memory modules,
Reconnect power cord to power source,
Boot system,
Double check/verify all CMOS/BIOS menu settings...

IF system boots and all is in order,
Feel free to rant and curse nVIDIA.
IF system fails to boot and/or recognize all memory modules,
Feel free to rant and curse at nVIDIA and GIGABYTE.

---

To access advanced settings in a GIGABYTE mobo,
When you are in the CMOS/BIOS menu,
You will have to press Ctrl + F1 keys together...

If it makes you feel any better,
Having issues by populating all four memory expansion slots appears to be nothing new, unfortunately.

The cause of the disaster had been found. When transfereing the cpu from the old mb to the new gigabyte mb a pin had been bent over when the cpu went to socket.
Therefore that pin must relate to ram somehow.
The pc still works and shows a 5000 dual core but it will now only take ram in 1 and 3.
When a new cpu is installed toomorrow i will post with the results i hope for
4 gig dual ram in slots 1234

It was a bent pin, no doubt at all now

Glad you got it sorted out.