Originally posted by zheshi:
My motherboard is using 2 256 DDR2 Ram. Thinking of upgrading it. is it advisable to put 1 512mb and 1 256mb together, or it must be both the same mb? Cause if that the case than i have sell away my 2 256 and get 2 512 one.
I'm using a dual-ram motherboard so it better that i put 2 ram rather than one.
SDram- the module processess the memory bits on the rise or on the fall of one clock sycle.
DDR (double data rate) - the module processess the memory bits on both the rise and fall of one clock cycle and so the term 'double data rate'.
dual channel DDR - the module processes data similar to DDR but has been split into 2 physical channels for even faster memory processing but requires timing synchronization and traffic control. in order to have dual channel ddr, the 2 (almost in 2s or 4s etc) memory modules must be of the same capacity and latency.
for the topic starter please check your computer maotherboard user manual for the random access memory slots details. it will tell you which slots to use for dual channel DDR and which recomended slots to place the modules for DDR only.
it can be like this for dual channel DDR2
slot 1- one stick of 256MB
slot 2- empty
slot 3- one stick of 256MB
slot 4- empty
config- 512MB of dual ch ddr
or
slot 1- one stick of 512MB
slot 2- empty
slot 3- one stick of 512MB
slot 4- empty
config- 1gig of dual ch ddr
it can also be like this for single channel DDR2
slot 1- one stick of 256MB
slot 2- one stick of 512MB
slot 3- empty
slot 4- empty
config- 768MB of ddr
or
slot 1- one stick of 512MB
slot 2- one stick of 512MB
slot 3- empty
slot 4- empty
config- 1gig of ddr
best consult yr mobo user manual