cant tell from the information you have given as its not just down to the clock speed--if you upgrade to a newer cpu it may have a slower speed but still be faster in operation due to newer core architecture
which model cpu are you talking about?
Well I had Pentium 4 R with 704 MB of RAM. But the problem was, that while working on it, the system suddenly used to crash due to overheating. That now an expert has changed the processor to 1.70 Ghz instead of 2.40 Ghz and the RAM has been increased to 1 GB . Please tell me, what difference will it have in performance of the system?