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Adding memory and getting none??

I have a slightly strange problem with an Abit BD7II-RAID mobo. It has three memory slots and supports up to 2 GB RAM. I now has 1 GB RAM (2x512). When I add a third 512 module (to get 1.5 GB) the computer still reports only 1 GB total. If I swap all the memory around in all combinations I still get 1 GB total. What's going on? What am I missing?

The memory is DDR2100 btw.


OSNN Advanced
TittleBitties said:
Is it the same brand and all that as the current sick(s) have? If not then that might be your problem
should make a difference.. i've had different brands, even had one with ECC and one without.... they both worked.
ming: It's not bad as it works in any pair combination out of the three memory modules, just not all three.

TittleBitties: I'll check the brand, it's most likely all Twinmos but I'm unsure (and I don't have the computer here right now).

toretto: Good point, I'll try that.


Quazatron R6 droid
Is the slot itself working? It might not be the RAM - it could be something to do with the memory slot itself. Unlikely but its worth a shot.


There is no answer!
Political User
I was going to say the same as ohzopants, check your bios or switch settings on your motherboard and check that dual channel is not enabled if in fact you have it, if so it will only recognize two sticks, although i doubt a three dimm slotted mobo would have dual channel
The slot is fine since combinations 1-2, 1-3, 2-3 work (as far as I know, will double check). The board does not support dual channel.


Arte et Marte
Just checked the manual on my Abit BE7-Raid, and its the same setup I have as you at present (2Gb max). The only thing in it I can see is that it says DIMM2 & DIMM3 are sharing - so im not sure what that signifies when all 3 slots are full. Unfortunately I don't have a spare stick of memeory, or else I
would stick it in and check for you.

Hope u resolve it
Vern: Yes, it works

tibboh: Yes I saw that too. I have no idea what it means or where to find the explaination. Just using slots 2 and 3 still works the same as 1 and 2...

The computer was needed elsewhere so I haven't been able to experiment anymore, but bios update is nexxt on the list.

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