Hello there,
I just slotted in a DDR 256MB RAM into my mobo MS-6734.
I was on 512MB previously, so it should show 768MB of ram on Control Panel-System or on dxdiag but it only shows 512MB
Using CPU-Z, it was able to detect the total of 768.

More info about the troubleshooting before posting this
1:There's 2 RAM Slots on my mobo
2:I insert 512mb on slot 1 and 256mb on slot 2(CPU-Z shows 768, system shows 512)
3:I removed the 512mb and my computer can't boot up( 256MB on slot2)
4:I inserted 256mb on slot1 ( CPU-Z shows 256 the same as System)


So, what's the problem here, guys
Problem with my slot2? But It can be detected on CPU-Z
Thanks in advance


FYI: my motherboard does support up to 2gb memory, therefore there's nth wrong with the RAM

I would guess that slot 2 will not work if slot 1 is not used.

You can test this by trying the 512 in slot 2 with nothing in slot 1.

Are the RAM specs & speeds identical?

You could try running MemTest with both installed.