Just buy more ram, i would suggest around 4-6gb. Then deicate more RAM to minecraft and then you will have less lag lagg spikes and 20fps +, on render distence far.
And if you have 50-100 pounds left, try buying an AMD phenon II black edition proccesor or an intel core i3 for your laptop. This plus the RAM will give you no lag lagg spikes and 50 fps +, on render distence far.
Hope i helped.
