how to speed up rendering

[skysthepip]

hi,
hope someone can help me,, i am an almost computer illiterate parent.
my son is doing a lot of gaming video clips on his youtube and he as also been partnered ,,he is currently using a standard £400 desktop from pcworld (sorry that is as much as i know ,i will get details tomoro). and is struggling with slow rendering.
we are hoping to buy him a new custom built in late january2013 and have a budget of around £1500 ($2250).
right my question is..is there a way of speeding up the rendering on the present pc ( i know you are going to need to know more spec)to make things faster until we can afford the custom build.
budget is £100-£200.
thanks mark

 

[Fujitsu_Technician]

we need to know the following;

Hard disk space
Processor
Memory how much
operating system
graphics card
so we can advise what to do