notebook memory upgade

hi,
just about to install extra memory to my toshiba sat been told i can add another 512mb next to a 256mb bit confussed as i thought you had to swop like for like ie two at 512 or two at 1g and not to mix and match, any advise on that, if you can mix does it matter which memory i take out left/right top/bottom, thanks
rich

 

Memory doesn't need to be in matching pairs. You can run a 256mb with a 512mb without any issues. Certain types of desktop RAM must be run in identical pairs (like RAMBUS or RIMM) but in notebooks, different sizes are OK; most of the time different speeds are OK too. Some older laptops that use SDRAM (144pin) may have issues if one stick is PC100 and the other is PC133, but if yours uses DDR (200pin) or DDR2 then you have no worries.
And it doesn't matter which stick goes in which slot, or if one is empty.....

 

If your laptop supports Dual Channel, the best performance would come from running two sticks of memory of the same size that supports the same timings..

You did'nt say what exact model Laptop you have?


My Toshiba Satellite has two memory slots, dual channel mode, can support 2 gb per slot
One slot is under the keyboard the other is on the bottom of laptop

 

thanx for the replys,
my notebook is toshiba a30-921 satalite, a bit old but running fine just slowwwww, if the memory is under the key board is it easy to get to ! will be adding another 512mb so is it just take one out then just replace with the new one, pc2100 ddr sodimm 200 pin, first time on a laptop !!
thanks rich............

 

I believe you can go up to 2 Gb of memory on your laptop.HOPEFULLY both ram slots are easy to get to on the bottom of your laptop.It's still got lots of life left in it . Maybe even vista if you max out the memory to 2 GB!??

 

hi,
all done and a lot quicker now, thanks for all the advise. the memory was on top of each other so was very easy !! when you no how,looking for a 1gb now. new life into this comp, once again thank,
rich.