When a game mentions requirements of a 3ghz processor, how does this translate to dual cores? I have just installed a e4300 @1.8 ghz, overclocked to 2ghz (i have ddr1 ram so can't do much more yet) so does this mean i therefore have a 4ghz processor speed? Cheers in advance
A Core 2 Duo is much faster at processing the same instructions even though it has a lower clock speed, as many here have replied. Also, as has been stated, not many games use dual cores, although having one allows the game to run on one core and background cpu processes run on another (assuming the os is doing it's job....debatable in XP). And newer games (some coming out fairly quick) will utilize dual cores.
It would help you to look
here at the cpu charts where I have selected FEAR, and a E6400 (2.1Ghz) against a Pentium D 940 (3Ghz dual core P4). You can see that the E6400 is 41% faster, even though it has a far slower clock speed. (the selected cpu's will be highlighted in red)
You can also see that the dual core P4 (a pentium d means P 4 dual core) is only 1 frame faster than a regular single core p4 if you look at the cpu's below the Pentium D 540. This means not only did the game not receive any benefit from the dual cores becuase it couldn't use them (1 fps is basically no benefit) but it also shows how much more efficient the architecture of the Core2Duo is.
The E6400 also beats out the Pentium EE 965, a 3.733Ghz dual core processor, by a minimum 10% in most of the gaming benchmarks. That means, by the old cpu standards (and doing some funny math extrapolation), that a 2.13Ghz E6400 is about the same as a 4.1Ghz P4. At your overclock rate, your processor is theoretically 6.5% slower than an E6300, but still far above any netburst Pentium 4/Pentium D made.
Centurion