My laptop model is samsung R538 with intel core i3-3rd gen and 3 gb ram .. the chipset is intel hm55 .. can i upgrade my ram to 2*4 ddr3 1333 hz of ram ?? knowing that the processor is x64
unfortunately it didn't recognise my laptop or its motherboardi don't see the max ram supported in the user manual nor anywhere else i can find.
try going to crucial and running their memory scanner from this page. it should be able to tell you the max supported and type of ram you can use.
https://www.crucial.com/usa/en/memory-buying-guide
those websites couldn't recognise my laptop .. cpu-z didn't tell me the max capacity tooRam vendors like Kingston or crucial have ram upgrade apps.
You enter the specific make/model of your laptop and you will get a list of supported upgrades.
Buy one of those, or at least the exact same specs from a different vendor.
Or, install and run cpu-Z
On the SPD tab, it will identify what ram slots you have and what is populated in them.
Laptops commonly only have two slots so you should be looking for a 2 x 4gb ram kit as a complete replacement.
667mhz actual frequency being 1333mhz effective, has nothing to do with dual channel.667 is really 1333 when operating in dual channel mode.
Good catch, I have edited my post.667mhz actual frequency being 1333mhz effective, has nothing to do with dual channel.
Double data rate is the reason for this (2 data transfers per clock cycle).
Dual channel means 2x times wider data path.