What's the difference between P4 C and E?

[marinlicina]

Ok, it probably is a thing everyone knows, I searched the net, searched this very forum, checked Intel site, but still can't find it.

What is the difference between Pentium 4 models with C and E?

I have seen stuff with same clock speeds but different cache/FSB etc. I know about Northwood and Prescott cores, but really don't know what the difference is. What is C and what is E? Which one is better?

Thanks for all who reply (Please don't flame me )

 

[fsstrike]

the C has a 512kb casche and .11 mircon (someone correct me if im wrong). the E has a 1024mb Cache and a .9 mircon. The C is cooler, and for the most part better than the E until 3.6Ghz. @ 3.6Ghz the E starts to pull ahead. Also the E is newer than the C.

 

[marinlicina]

So then E is Prescott and C is Northwood? Right?

And does it really make a difference in heat/performance and overclockability?

Aaand... is it possible, for example, to push a 2.8E to 3.0 or a 3.2E to 3.4/3.5?

 

[fsstrike]

Originally posted by: marinlicina
So then E is Prescott and C is Northwood? Right?

And does it really make a difference in heat/performance and overclockability?

Aaand... is it possible, for example, to push a 2.8E to 3.0 or a 3.2E to 3.4/3.5?

Prescott = E - .9 Micron 1024kb Cache (Runs hotter) (Better @ 3.6Ghz, worse under)
Northwood = C .11 Micron 512kb Cache (Runs cooler) (Better Under 3.6Ghz)

And ya it is very possible to push a 2.8E to 3.0 or 3.2E to 3.4, but there is less chance. You also MIGHT need a better cooling solution. For the most part, I hear that for OCing the northwoods are much better. Most people still buy northwoods because they are usually faster. But the difference is still, very small.

 

[Vee]

P4C is the Northwood core, plus featuring 800fsb and hyper threading.
P4E is the Prescott

Prescott has a deeper pipe in an effort to reach more GHz. The Prescott seem to have been very hard to clock high, though, so I'm not sure it was so successful. I'm playing somewhat with the idea of the P4C on .090 micron...

A deeper pipe results in a number of performance penalties, however. In an effort to compensate for those penalties, a lot of hot transistors and chip area has been used up in order to improve branchprediction. It also has a larger L2 cache, 1MB instead of 512KB. However, all that does not seem to improve performance.

End result is a cpu that is architectually somewhat different from P4C. Because of that, it performs differently on benchmarks and applications. It's hard/impossible to say which is the best one, on more than one application at a time (much like AMD vs Intel).

I suspect most people here will tend to still favor P4C though, and so do I.

 

[Stormgiant]

Originally posted by: Vee
P4C is the Northwood core, plus featuring 800fsb and hyper threading.
P4E is the Prescott

The way you wrote, it sounds that the Prescott does not have 800fsb and HT .

 

[Vee]

Originally posted by: Stormgiant

Originally posted by: Vee
P4C is the Northwood core, plus featuring 800fsb and hyper threading.
P4E is the Prescott

The way you wrote, it sounds that the Prescott does not have 800fsb and HT .

OK, the way I intended it to read, is that the Northwood doesn't always have. Neither does the Prescott? I believe? But the P4C and P4E do.

 

[jhu]

p4c - fairly large breasts
p4e - enourmous breasts

and that makes all the difference

 

[Zebo]

E is an F. As in failure or fusked up.

It's a CPU that chews up about twice the power of its hammer competitor to and about 30% more than C. It's slower than the C. And to cool it, you almost need a degree in cryogenics.

Stay away.

 

[byosys]

Isn't the Northwood a 130nm fabing process and the Prescott a 90nm?

 

[AristoV300]

You are correct sir, not .11 as stated above. The Northwood and the P4EE Gellatin are .13.

 

[charloscarlies]

Originally posted by: Zebo
E is an F. As in failure or fusked up.

It's a CPU that chews up about twice the power of its hammer competitor to and about 30% more than C. It's slower than the C. And to cool it, you almost need a degree in cryogenics.

Stay away.

 

[Bartokomus]

my 2 pfennigs:

Northwood all the way if it's from the evil empire

 

[bobbyk]

NOrthwood is a .13 micron

 

[LTC8K6]

P4C Northwood - 200/800FSB 512K Cache Hyperthreading

P4E Prescott - 200/800FSB 1MB Cache Hyperthreading except:
NEW 2.4A and 2.8A Prescott 133/533FSB 1MB Cache No Hyperthreading