I have a Pentium P4 1.6 with a Gainward GeForce 5600 Ultra with 256Mb. Will upgrading my CPU to a 2.6Ghz make any significant difference; i.e. is £150 or so for a CPU upgrade justify the performance boost of the game?
Depends entirely what game(s) you are playing and what your current FPS are in that game. If they are falling below 25 then check out the CPU useage at that time, if it is 100% there is a strong chance that a CPU upgrade will improve the FPS. Of course, some games constantly aggisn 100% CPU time to the game process so you won't be able to check in that case. Then you could try with a friend's CPU and see if that helps. The other possiblity is if you have an old motherboard the memory bandwidth is limiting.a CPU upgrade justify the performance boost of the game?