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That itself is unlikely to be the issue here. It would mean however that the PC2100 (133MHz) memory would be slower than what your laptop is capable of using (PC2700 or 166MHz) but they should still work. I suspect that he main issue here relating to why the laptop can only see half the capacity of each DIMM is the memory "density" issue (which may be related to the rank/bank issues mentioned in my posts on the other bulletin boards linked above). Try running some of the tools that I mentioned to interrogate your laptop hardware with the original and new RAM installed and see what they say.thanks clubman, I think its the same issue. One website recommends memory with 2700 something or other and the cards I have are 2100.
Are you sure about that? That would be extremely odd!And the strange thing is sometimes when both cards are in it recognises the 1024MB but then later will go back down to 512mb.
That itself is unlikely to be the issue here. It would mean however that the PC2100 (133MHz) memory would be slower than what your laptop is capable of using (PC2700 or 166MHz) but they should still work. I suspect that he main issue here relating to why the laptop can only see half the capacity of each DIMM is the memory "density" issue (which may be related to the rank/bank issues mentioned in my posts on the other bulletin boards linked above). Try running some of the tools that I mentioned to interrogate your laptop hardware with the original and new RAM installed and see what they say.
Are you sure about that? That would be extremely odd!
Online memory configurators from Crucial and other vendors will normally make very specific recommendations as to what memory parts are compatible - down to specific make and model numbers. Just looking for PC2700 SO-DIMMs is not always sufficient for example (as I learned the hard way!).Yeah I used the scanning tool on http://www.crucial.com/eu/ and it said I have 2 slots with a capacity of 512 (2700) in each but I had only a 512 (2100) card in one of them. In fact I have 2 cards in there but it doesnt recognise one of them it seems.
results from the scan...
Currently installed memory:
slot 1: 512 MB DDR PC2100
Sounds like the motherboard could be at fault! If you put in one 256 Meg card and one 512 Meg card you should be able to see which is the faulty memory slot. You may be able to see something obviously out of place with the faulty slot but in most cases I think that you might need to replace the motherboard.
The fact that you said it would sometimes recognise the two cards makes me think it could be something very slight like a lose wire or badly soldered connection, badly stripped wire touching another, ...
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