What's the "E" after the ghz?

[darkchakra]

Hi I wondor what the E means after the P4's processors cpu? Does it mean Extreme? It still has about 1mb cache compared to an extreme edition 2mb. What is the difference between the one with E's and regular P4 processors?

[Sentential]

E means its a prescott just like C means its a northwood. Extreme Editions have the typical "EE". Es run hotter and are about the same in terms of peformance to the "C"s. There really isnt much benefit to getting an E only other than availablity.

However if you are overclocking newer Es are known to clock better than old northwoods

[Duke3d87]

As he said, E = Prescott which means its based on the 90nm process, has a 1 MB L2 cache, a larger L1 cache, SSE3, (NX in some processors) and soon to be 64 bit extensions and a 2 MB cache. Its got a 31 stage pipeline which i think is the dumbest thing that Intel could have done

[JCLW]

And Welcome to the Forums :)

[batboy]

Looks like everyone did a good job explaining the "E" means Prescott core, but it also means 800 system bus too.

[SolidxSnake]

the new pressys are the LGA, right?? (the 775 ones i mean, not the 478s)

[Sentential]

the new pressys are the LGA, right?? (the 775 ones i mean, not the 478s)
Yes the newer prescotts are all on 775

[SolidxSnake]

erm woops... i definately wasn't thinkin about writing "the new pressys are the LGA, right?"....i cant remember exactly what i was thinkin, but can't some of the LGA ones (LGA = Large Grid Array, correct??) have smaller than 800FSB?? always thought the E meant it was a pressy, and the FSB could vary..

[batboy]

Prescotts are in socket 478 and socket LGA775 flavors.

The only LGA775 Prescotts that are not 800 bus are the Celeron D 533 bus LGA775 (also made in socket 478).

The 800 bus socket 478 Prescotts P-4s are 2.8E, 3.0E, 3.2E, and 3.4E. There are two 533 bus Prescott P-4s too: 2.4A and 2.8A.

[Duke3d87]

Also, the LGA "socket" was designed for a larger heatsink and delivering more power to the CPU