Newbie-asker :
Rogue Leader :
Newbie-asker :
But my PCIE will botteneck it
Not really no, The speed difference is minimal. What will bottleneck it is your very old processor and board in general.
I'm getting newer processor too
Even if you got the fastest LGA 775 processor that will work on your board, it will still bottleneck any card as fast as an R9 270x or GTX 750/950. Just keep that in mind within your expectations.