New memory not recognized

[Billmanweh]

I replaced my keyboard today, and while I had it off I added another piece of memory. I had the original 1GB in the bottom slot and added a 2GB into the top slot. I was sure I got the right type of memory, it's a DDR2 667 SO-DIMM. Well, I snapped it into place, put the palmrest back on and turned the computer on. When I got to My Computer/Properties/General, it's still showing 1GB of RAM. I haven't run any other tests.

What would be the first step to seeing what the problem might be? Maybe I missed a step?

[Harryc]

The first step would be to remove the original 1GB RAM module and seeing if the T60 boots or beeps ...

[Billmanweh]

The first step would be to remove the original 1GB RAM module and seeing if the T60 boots or beeps ...

meaning take out the 1, and put just the 2 in? would it matter which slot it goes in?

[Harryc]

Doesn't matter, just try the 2GB module by itself...try both slots.

[Billmanweh]

Doesn't matter, just try the 2GB module by itself...try both slots.

Ok, I'll give that a try, thanks.

[Billmanweh]

It boots up with just the 2GB and My Computer/Properties/General shows me having 2GB of RAM

[Harryc]

OK, now if you put the 1GB back in (leave the 2GB in) what does my computer show? If it's 1GB, then you have a RAM compatibility issue. Personally if that were my machine and that was the case I'd leave the 2GB module in (remove the original 1GB module) and call it a day, or else return it and get (2) like modules, .e.g. 2 x 2GB Crucial PC2-5300.

[Billmanweh]

If I do want to try and get 3GB, would a possible solution be to get a 1GB that is the same brand, etc as the 2GB?

[Harryc]

Well, there's another advantage in running 2 x 2GB, even though only 3GB will be usable on a T60, you will be running the RAM in synchronous dual channel mode, which is slightly faster than asynhchronous dual channel. The other consideration is that 2 x 2GB PC2-5300 is cheap nowadays..

http://www.newegg.com/Product/Product.a ... 6820148201

[Billmanweh]

Ok, I'll try both again and if it's doesn't recognize the 3GB, I'll run just the 2GB. But if I were to buy a new, identical stick of 2GB (exact same brand, everything) RAM, I'm pretty much guaranteed not to have any more compatiblity issues?

[Billmanweh]

Well, with the original 1GB in the bottom slot and the new 2GB in the top, it recognized only 1GB. But I tried putting the 2GB in the bottom slot and the old 1GB in the top and it now recognizes 3GB. Maybe just one of those quirky things?