Dual-core vs. 2 Single Core

[MSD]

Is there a noticable performance difference between a computer with 2 single core processors and one with a dual-core processor?

 

[raybay]

Can be noticeable, but you need to include the power supply, cooling fans and other issues into the mix. There are good full reviews on Toms Hardware and Anandtech that give you a good picture of how they compare.