Differences in processor size

Solution
Pentium 4 is only a single core, and while it is almost twice the processing power, with only one processing core, it can't accomplish more than one task at a time. theoretically, the Core Duo should reach twice the processing power (3.6.Ghz), but with technical limitations, it will probably be closer to 3.2Ghz.

also, a dual-core CPU is necessary to play most HD video (1080p). i have a rather fast Athlon 64 3200+ with an Nvidia 7950GT video card and still can't play 1080p! but my Core 2 Duo 6300 1.6Ghz plays it with no problem, and with a cheaper video card in it!

Pentium 4 is actually two generations behind the Core Duo (Pentium D came between them), and the Core 2 Duo is even faster!
Pentium 4 is only a single core, and while it is almost twice the processing power, with only one processing core, it can't accomplish more than one task at a time. theoretically, the Core Duo should reach twice the processing power (3.6.Ghz), but with technical limitations, it will probably be closer to 3.2Ghz.

also, a dual-core CPU is necessary to play most HD video (1080p). i have a rather fast Athlon 64 3200+ with an Nvidia 7950GT video card and still can't play 1080p! but my Core 2 Duo 6300 1.6Ghz plays it with no problem, and with a cheaper video card in it!

Pentium 4 is actually two generations behind the Core Duo (Pentium D came between them), and the Core 2 Duo is even faster!
 
Solution