Help C2D or Pent D Dual Core whats's the Difference

[autopete]

As the title says

Whats the difference between the 2, Pent D 3.4 dual core and C2D 2.4 whats faster?

When I look at video cards and it says needs a 3.0 pent for mpeg 2 encoding , will the C2D at 2.4 do the job?

It's been a while since I built a system, and use to read here all the time. I remember reading an article here that said every time Intel comes out with a new cpu with added instructions that it actually slows the cpu down and add to that they release it at low speeds. it's better to stay at high speeds with less instructions untill price comes down and speed increases.

Thanks

Pete

 

[DrMrLordX]

The Core 2 Duo at 2.4 ghz is faster. They have fundamentally different CPU architectures with the Core 2 chips doing more per clock than Pentium Ds.

The CPU you're thinking of that had "added instructions" that was slower was probably the Prescott. It had a longer pipeline than its predecessor (Northwood) which made it a tad slower at speeds below 3.6 ghz. You don't need to worry about Prescott. Core 2 is comprised of two new cores (Conroe and Allendale) which are very good CPU cores.

 

[myocardia]

A C2D at 2.4 Ghz (the E6600) is twice as fast as a 3.4 Ghz P4, if neither are overclocked. Overclock both to the max, on air, and the E6600 will be more than 3x faster.

 

[Duvie]

One of the main features is the fact that the Core 2 Duo architecture implemented 4 execution units.....AMD has 3 hence why C2D's were able to finally able to say they are faster clock to clock....I think the netburst architecture had 2 execution units.

 

[autopete]

Why do the pent D say they are dual core?
Do they have 2 cores like the C2D ?

This is where I am kinda of confused.

 

[magreen]

Originally posted by: autopete
Why do the pent D say they are dual core?
Do they have 2 cores like the C2D ?

This is where I am kinda of confused.

The Pentium D is dual core. It has 2 slow old cores, based on the Pentium 4 architecture. It's like having two Pentium 4 processors in one chip.

The Core 2 Duo is also dual core. It has 2 fast new cores with a whole new architecture.

If you'd like to compare the speed of a Core 2 Duo to a Pentium D, you can double the clockspeed of the Core 2 Duo and that gives its approximate equivalent in Pentium D terms. For example, a Core 2 Duo running at 2.4 GHz is approximately equivalent to a Pentium D running at 4.8 GHz. That is, it has two cores which are each about as fast as a 4.8 GHz Pentium 4 processor.

Hope that helps.

 

[NZ]

why are am2 said to be a lot slower than the c2ds when they are both dual core and etc.?

 

[n7]

Different architechtures

You can read more about this on www.anandtech.com under the CPU section

 

[Cogman]

Originally posted by: NZ
why are am2 said to be a lot slower than the c2ds when they are both dual core and etc.?

What you need to know is that numbers in the cpu world (as strange as this may sound) don't mean a lot on there own. For example, a processor that is 4.5 Ghz compared to one that is 1.8 Ghz. Many that don't know a lot about computer will assume that the 4.5 Ghz cpu will be faster, but that is simply not true. It could be the faster one, but you have to look at what architecture it is using, how much cache they each have, ect..

The same goes for dual cores, the first pentium dual cores where fairly slow and kind of sucked. The new Conroe cores, however, are unmatched.

One other thing you need to think about is the fact that not every program can support using more then one core. so 2 cores does not always mean twice as fast, in fact it rarly does right now. it is completly feasable to have a 10000 core processor that runs half-life just as fast as a dual, or single core processor. That is because half-life is not made to use 10000 cores.

Basicly if you really want to know why one is faster then the other, you have to do a fair amount of research on what goes into them both, it would take a very long time to explain every diffrence and why one is better then the other.