Depends on what the increase is
Single-Core going from say; 1.6GHz to 1.8GHz?
Going from the budget, or starter series of AMD or Intel?
For instance Intel 'Celey' (Celeron) to Pentium 4?
AMD 'Sempy' (Sempron) to XP Athlon ?
A comparable Pentium 4 processor, has TWICE the L2 cache, that a Celeron has.
Cache for a Processor, is a small memory area for the Processor.
It operates at the same frequency rate, ('Speed'), that the Processor does.
Therefore it is the first memory area the Processor accesses.
The more cache you have, the faster the Processor can take care of the tasks.
[Ram Memory typically operates at about half, of the Processor's Front Side Bus. (FSB)
It is the second memory area the Processor accesses.
The Harddrive is the third ]
Moving from a Single-Core processor to a Dual Core, = Yes.
There are Celeron's, and Pentium 4's; that fit an LGA 775 processor socket, and are supported by that motherboard chipset.
This same motherboard chipset may also support dual core Intel processors.http://en.wikipedia.org/wiki/List_of_Intel_Celeron_microprocessors#Celeron_D_.28single-core.29http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Pentium_4.2FPentium_D.2FPentium_EE_chipsets
Pentium D's ARE dual core. Celeron D's are Not.http://en.wikipedia.org/wiki/Celeron_D#Celeron_D
Third paragraph down below the bold black subheading - Prescott-256
"......................The D suffix actually has no official designation, and does not indicate that these models are dual core.........................Unlike the Pentium D, the Celeron D is not a dual core processor."http://en.wikipedia.org/wiki/List_of_Intel_Core_2_microprocessors
CPU = Central Processing Unit. Another term used is Microprocessor, or simply Processor for short.http://en.wikipedia.org/wiki/Northbridge_%28computing%29
To find out what motherboard chipset is on your motherboard, on a working computer, and without opening the computer; use CPU-Z from CPUID.com,http://www.cpuid.com/softwares/cpu-z.html
Just click on the Mainboard tab.
Now, what is the motherboard manufacturer, and model number;
What is the computer manufacturer name, and model number?
The model number can be found on the back of a desktop computer, next to the Windows product key; or up on the side of the computer tower.
It is on the Bottom of a laptop.
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