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478- 775 - a - b - c

P

Polyphemus

n00b
Joined
Feb 19, 2004
Messages
44
Hello, can anyone point me to a guide about intel processors that I could understand.

Yes I am a newb but I want to change that, I'd like to find a simple but complete guide where I could learn the diff. between a 478 and a 775 pin cpu, and also learn the diff. between an a , b , c cpu.

Thanks in advance for your help.
 
There is no hard and fast rule to the alphabet scheme, but in general for Pentium 4 processors B = 533 Mhz FSB and C = 800Mhz FSB.

In addition to A, B and, C. There is also E, EE, and J now.
 
ZenOps said:
There is no hard and fast rule to the alphabet scheme, but in general for Pentium 4 processors B = 533 Mhz FSB and C = 800Mhz FSB.

In addition to A, B and, C. There is also E, EE, and J now.
Click to expand...

also prescott comes in a 2.4GHz version that only has a 533MHz bus

I'm guessing J is the socket 775?


edit:

here is a list of Intel chips

under the Pentium 4 section, keep in mind that

Willamette = A
Northwood = C
Prescott 478 Socket = E
Prescott 775 Socket = J?

either way, I don't think there is any real difference in terms of performance between identical 478 and 775 chips
 
Okay heres a short write up.

Socket 423 = the original P4 'Williamette' launched and it used this socket..

Socket 478 = Intel decided it would need a better socket to expand on, thus created the 478 pin socket. Intel started producing P4 'Williamette' cores that used this socket, but shortly after Intel released the MUCH better P4 'Northwood' which came only in a socket 478 package. Now recently Intel launched the newest generation P4 named 'Prescott' Which started off using the 478 package.

Socket 775 = Intel is moving to the new socket 775, which right now you can purchase Prescott P4's and motherboards in the socket 775 flavor.

a, b, c, e, ee, j etc.

(a) = Intel Introduced the P4 'Williamette'. Then moved on to the P4 'Northwood'. During transition, both cpus could be had in the same speeds. Williamette went from 1.3Ghz to 2.4Ghz, Northwood (a) came out at 1.6a up to 2.6a. So 1.6-2.4, there was overlapping thus the Northwood P4 was called the P4x.xa. Also Northwood had a die shrink to .13 nm and the L2 cache was increased from 256k to 512k.

(b) = Intel then upgraded the Northwood lineup. The Northwood (a) had a FSB of 400Mhz. They then brought out the Northwood (b) which had an increased FSB to 533Mhz. Northwood (b) had a lifespan of 2.26Ghz to 2.8Ghz.

(c) = Intel again has upgraded the Northwood line of CPU's. The Northwood (c) Has an Increased FSB to 800Mhz. Also Intel turned on an internal feature "Hyper-Threading". The Northwood (c) ranges from 2.4Ghz to 3.4Ghz

(e) = The P4 has a newer core named Prescott which is available on socket 478 and 775. The Prescott core now has improved HT along with a few other things. The L2 cache is increased to 1meg and L1 cache increased from 8-16k. The die has been shrunk to .090 nm and ranges from 2.8Ghz to 3.6Ghz.

Now back to square 1.

Prescott also comes in a castraited (a) version (2.4ghz to 2.8Ghz) which has Hyperthreading disabled and only has a lowered 533Mhz FSB and is only available on 478.

EE = P4 'Extreme Edition' is the creme de la creme of the P4 lineup. Its based on the 'Gallatin' Xeon core (server chip). Available from 3.2Ghz to 3.6Ghz and has 512k L2 cache and 2 extra megs L3 cache. As well I *think* it has the xeon's improved HT?

Future:

Prescotts might have increased L2 cache to 2 meg I think, and an increased FSB to 1066Mhz. Also Dual core (on one CPU) is the talk, and 64 bit extensions are in the midst. After that Intel seems to want to go to the more efficient Dothan core which ironically is the big brother of the P3 core I believe. Probably dual core, lots of cache, decrease in speed yet more cpu horsepower with lower heat and power usage.

After that, Intel will buy out Black and Decker, we will have flying cars and our PC's will be PDA style systems that double as Pizza hydrators which will take a frozen dried mini pizza and turn it into a piping hot X-tra large pizza within seconds. Also there will be no more toilet paper.......... . . .
 
The EE and the Athlon64 FXs are kinda like one of those way-crazy tricked out models that car manufacturers sometime put out so they can say that it's a "production model"; done often with in the 60s & 70s for NHRA & NASCAR, most commonly with rally cars these days. Going above & beyond the flagship cars, such as the Corvette, Viper, these things exist to show just how bad-ass a company can be without regard for cost.

The EE & the FX are kinda like this - they take the flagship server/workstation CPU, push it just a bit harder & give you a hardcore machine that primarily exists for publishing benchmarks. Numbers recently shown on the front-page of [H] showed the FX to be about 1% of AMD's total A64 production, I'd assume the EE has similar runs.
 
The Prescott has 64bit EMT64 extensions buit in, but is only going to be enabled in the socket 775 variety. Dell already has the first EMT64 Pentium 4's.

The Pentium 4 Extreme Edition is called Northwood by Intel, however it is based on the Gallatin core, due to the design of it's cache. However it doesn't have SMP support. It is neither Gallatin, nor Northwood. But rather a pleasant mixture of both.
 
huh?..

big worm, you talk too much. Make your statements shorter... a thing called "simplicity"?
 
The excellent guide on Tech Report comes to mind.
http://techreport.com/cpu/
as well as the arstechnica documentation regarding the history of the P4
http://arstechnica.com/cpu/004/pentium-2/pentium-2-1.html

A basic breakdown:

Of the newer P4 processors, the Prescott versions are the smaller die (90nm) and have greater cache (1MB L2), and have support for the new SSE3 instruction set. However, since they were primarily designed for future scaling of speed to 4-5 GHz, their performance in many benchmarks is lower than their current replacement, the Northwood.
These are larger in die size (.13nm), have 512 L2 cache. The Prescotts have a designation of P4E and the Northwoods P4C. The Extreme edition is the Prescott processor with even more cache still and is designated with EE.
The new Socket - T, which is also LGA775 is very different from the entire design. The pins are no longer on the processor, but are on the motherboard, shifting the cost of producing the processor down.

In my opinion, if you're looking for a 'best bang for the buck', right now you're best off with a Northwood version (That's the C) in 2.4 up to 3 GHz flavors. While technically the Prescott is a superior design, the benefits won't be realized until the speed of the front side bus goes up to 1Ghz, and the processors break 4GHz

Hope that helps
 
warhead said:
The Extreme edition is the Prescott processor with even more cache still and is designated with EE.
Click to expand...

Actually EE is not a prescott core, like said before, its a Gallatin core.
 
Wow guys,

i posted yesterday and already so many responses.

Thanks alot to all of you, its now much clearer to me, tyvm to all of you.
 
warhead said:
The excellent guide on Tech Report comes to mind.
http://techreport.com/cpu/
as well as the arstechnica documentation regarding the history of the P4
http://arstechnica.com/cpu/004/pentium-2/pentium-2-1.html

A basic breakdown:

Of the newer P4 processors, the Prescott versions are the smaller die (90nm) and have greater cache (1MB L2), and have support for the new SSE3 instruction set. However, since they were primarily designed for future scaling of speed to 4-5 GHz, their performance in many benchmarks is lower than their current replacement, the Northwood.
These are larger in die size (.13nm), have 512 L2 cache. The Prescotts have a designation of P4E and the Northwoods P4C. The Extreme edition is the Prescott processor with even more cache still and is designated with EE.
The new Socket - T, which is also LGA775 is very different from the entire design. The pins are no longer on the processor, but are on the motherboard, shifting the cost of producing the processor down.

In my opinion, if you're looking for a 'best bang for the buck', right now you're best off with a Northwood version (That's the C) in 2.4 up to 3 GHz flavors. While technically the Prescott is a superior design, the benefits won't be realized until the speed of the front side bus goes up to 1Ghz, and the processors break 4GHz

Hope that helps
Click to expand...

The Extreme Edition is only a Prescott in the LGA775 package. The 478 version is Northwood/Gallatin based.
 
Not to put too fine a point on it, and you all are correct, however I intended my statements towared future-oriented design in regard to the Extreme Edition. Yes, in fact the current models are running on .13 micron, and are the Northwoord/Gallatin core. And it is available in both pin designs, LGA and PPGA2. Intel, however is dedicated to the .90 nm process and I believe that we will see everything shifting that way.

A reference:
http://www.theregister.co.uk/2004/08/09/intel_p4ee_720/
 
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