I will be replacing my 2003 pentium 4 extreme, 3.2 ghz system (system bus 800 mhz, L3 cache 2 mb, components from same period) with e8400 core 2 How do the two processors generally compare in speed, games, etc?
Your old P4 is the equivalent of a mid 1950's Mercede's SL, nice at the time and probably still works ok, The core2 acrhitechture is a fuel injected engine on a carbon fibre chassis.
There is a hell of a lot more to consider than just clock speeds, the core2 architechture was a massive step up from the centrino / P4 architechtures available at the time, it was massively more efficient in terms of processing and power consumption.
I rememeber reading the reviews at the time and I couldnt actually believe what intel had done with core2 was possible, probably the biggest evolution in processor technology since the original pentium.