no dual channel is active only when 2 identical sticks are present in the system.
that assumes the laptop is even dual channel capable. this does not mean adding the ram would be a bad idea. you'll get benefits from it even if it does not run in dual channel.
no dual channel is active only when 2 identical sticks are present in the system.
that assumes the laptop is even dual channel capable. this does not mean adding the ram would be a bad idea. you'll get benefits from it even if it does not run in dual channel.
when shopping try to match the specs of the ram perfectly. this will give you the best chance of dual channel working.
not just 1333 mhz but also timings if possible should be the same. but again even if it does not work in dual channel mode, you will still get the benefits of the added ram. still worth it either way.