Module Enabled but no DIMM seen

[laad]

Hi
I have a Gigabyte GA-X58-UD3R. When I try to add more memory I get the following problem. The slot 4 does not indicate a DIMM but enables it. This is reproduceble for many differnt combinations of the DIMM moduels and also for different configurations.
Any suggestions please

 

[Raiddinn]

How much RAM is already in it before you add the 4th stick and how big is the 4th stick?

 

[laad]

well all modules are 4 GB. they are matched 3 by 3. I can make the sytem find (beside the starting 12 GB) 16 and 20 GB but as soon as I have slot 4 occupied it (the bios) claim not to see the DIMM but it enables it. The bios displays something like this


. . . . . . . . . . . . . . . . . . .1 . . . . . 2 . . . . .3 . . . . . .4. . . . . .5 . . . .6
DIMM slot (MB) . . . . . 4096 . . . . - . . . 4096 . . . . - . . . 4096 . . -
Enabled slot (MB) . . . 4096 . . . . - . . . . . - . . . . 4096 . . . .- . . . . -


The piece that it does not enable slot 3 is normal as this configuration disables this slot. The behaivier that it does not see that there is a DIMM in channel 4 but still enables it is consistent for 4,5 and 6 DIMMs

 

[Raiddinn]

Do I understand it right that if you put in all 6 sticks you get

4096...4096...4096..............4096....4096
................................4096........................

?

 

[smorizio]

check that the ram is all the same and that it been tested or qal for that mb. you may have to bump the dimm voltage up a bit.
if it wont see it you may have a bad dimm slot or a bad dimm.

 

[laad]

I have exchanged the DIMMs and tested with at least four different ones (systematicly). I have increased the voltage.

 

[laad]

Do I understand it right that if you put in all 6 sticks you get

4096...4096...4096..............4096....4096
................................4096........................

?

yes

 

[Raiddinn]

No matter what order, any of those other 5 sticks in that same slot does the same thing?

 

[laad]

well I keep the matched tripples in 1,3,5 or 2,4,6 they are the same but with different version numbers. Same model number and timing. I have only systematicly tyed 2 from each set in slot 4 but before I started out by systematic test I may have had others in that slot.

 

[Raiddinn]

If you just have 1 in slot 4 and no others in any slot, what happens?

Also, when you have 1 in slot 1 and 1 in slot 4, when you go into Windows right click on My Computer and hit Properties and tell me how much RAM it has listed there.

 

[laad]

do not work at all. I have assumed I have to start with the odd slots though.

 

[laad]

further I do not normaly run Windows. But the problem with the suggestion is that the boot process do not pass the "calylating RAM size" stage. this means I can start no OS with a memory stick in slot 4

 

[Raiddinn]

Sounds like its just a bad slot to me. The results of the tests didn't do anything to change my theory.