Or change your graphic card, because you can.
No need, that CPU and GPU are quite balanced. Only is worth it if he overclocks the CPU, witch he should do anyway.
In this case i speak from practical experience. I had this cpu with a 4850 512. Hes got a good CPU that at 3 Ghz gives very decent performance. I lapped mine at the time even reducing 10º in temp. and Btw, i was using a crap mATX board (Asus A2M-VM) with 533Mhz DDR 2 memory.
Save your money for a better rig, overcclock that cpu. If you need help just post with questions.