kennethsalita :
Can we elaborate that not going to be great part...
Will i still get a decent performance when editting videos under core i3 8gb/12gb ram ? Will it crash or hang or lag ?
Adding an 8GB RAM to your current 4GB might work, it might not work at all.
If it works, it will be somewhat better than the current 4GB.
Replacing the existing 4GB with 2 x 8GB, giving you 16GB, would be better still
It will be somewhat better than the proposed 12GB.
But....the CPU in that laptop is still going to be a limiting factor. And that, you cannot change.