In general, Core 2 Duo are high performance processors, with two "CPUs on a chip" (that's the "core duo" meaning.
While Celeron processors are, generally, single core, low to medium performance, intended for budget to moderate mobile (laptop) use. Lower power, single CPU, less performance (but uses less battery power in that).
Note, having 2 cores is usually a plus, as the CPU has two 'brains' and can do two things at once. But some software is not two-core-aware, so in those cases the two cores wont really be used, and the chip will act like an older style single core.
Bottom line:
So if you need high performance, go for the Core 2 Duo (it will be at a higher price than Celeron, and will use more electrical current).
If performance is not a concern, but you need lower cost, or longer battery life, the Celeron may be a good choice.
First of all, the Intel Core 2 Duo has 2 cores where as the celeron has only 1 core. Celeron is kind of outdated and the Intel core 2 duo is much faster than the celeron processor
Celeron doesn't refer to any particular processor series. Celerons were cost-reduced versions of their Pentium equivalents. The Celeron in question could be based on a Pentium 2, Pentium 3, Pentium 4, Pentium D, or Core 2 Duo. In which case the answers would be "Pentium 3, Usually Pentium 3, Celeron, Celeron, and Celeron", respectively.
Possibly. "Celeron" doesn't refer to any particular processor. They are cost-reduced versions of the Intel Pentium II, Pentium III, Pentium 4, Pentium M, and Core 2 Duo. Assuming that your Celeron is based on a processor that is faster than the Pentium III, you shouldn't have any problems. If yours is based on the Pentium III, check the clock speed. A 1.2 GHz Celeron, for instance, is probably fast enough for a game that requires a 1 GHz Pentium III.Other factors, such as the graphics card of your system, may also be important.
The Celeron is a budget version of a Pentium II or higher processor. As such, they are compatible with any computer that can run a Pentium family processor. Macs were never shipped with a Pentium processor - Intel Macs started with with the Core Duo. However, one could theoretically replace the Core Duo with an older Celeron with the same socket type.
No. The Celeron and Pentium Ms predate the Intel Core line by several years.
T4200 has Enhanced Intel® Speedstep Technology which the celeron doesn't. http://ark.intel.com/Product.aspx?id=37251 vs http://ark.intel.com/Product.aspx?id=41498 Not having speedstep on an laptop will be bad for your battery consumption.
the Core, the Pentium, the Celeron, and the Atom families
It depends on your applications, but a Celeron D won't be all that much slower and will provide excellent value.
Sort of. The processor is an Intel Coppermine-core processor that runs at 733 MHz. It is soldered onto the motherboard in BGA2 fashion, similar to that found in many older Pentium III and Celeron laptops. The processor can't be considered a Pentium III because it has half the L2 cache of a normal Pentium III at that speed and FSB. It's not a quite a Celeron either, though, since no other Celeron in that layout had that high an FSB (133 MHz in the Xbox vs. 100 MHz for other mobile Celerons. It thus sits somewhere in between in terms of performance.Architecturally, it is no different than a Pentium III, though. Linux applications written for the Pentium III can run without modification on the Xbox.
Celeron refers to a line of processors from Intel. They are low-cost counterparts of Pentium II, III, 4, M, and D processors. They differ mainly in the amount of L2 cache. Celerons have a smaller L2 cache, which is basically a buffer in the CPU to avoid slowdown. With a smaller L2 cache, Celerons perform slightly worse in some processor-intensive applications.
The Celeron processor is a good and cheaper alternative to Pentium II when higher performance is not required and the price is a important. The Celeron processors are based on the same core as more expensive Pentium processors but lack in features such as L2 cache size and bus speed.
No. A Pentium Dual Core is a cost-reduced version of a Core 2 Duo. Think of it as the new equivalent of a Celeron. The Pentium D is basically a dual-cored version of the Pentium 4, but is far less efficient than a Core 2 Duo (or a Pentium Dual Core).
It is and it isn't. Intel has packaged a large number of different processors as "pentium 2" and "celeron." The celeron tended to be the "budget processor," but due to availability the Celeron frequently was actually a real Pentium 2. The Celerons were labeled and set to report that they were weaker than they really were. This is where overclocking comes in. Overclockers found that Celerons could be overclocked just as well as the Pentium 2 chips on certain production runs. A little more research showed what actually was going on.