P4 Processors

[PostalRIT]

Hey All,

I used to know all the different processors and what they meant (2.4A, 2.4B, 2.4C) but now things have updated. Is there a good place that I could start and read up on all the new changes and specs. I know intel.com would be a good place to start, and have, but anything elses???

Like, what is this 2.8E now??? They are going to run out of letters eventually!

Postal

 

[Slava]

2.4A 400 mhz fsb(front side bus) no HT(HyperThreading) 512kb cache
2.4B 533 mhz fsb no HT 512 kb cache
2.4C 800 mhz fsb with HT 512 kb cache

New 2.4A is prescott with 533 mhz fsb, no HT, with 1 mb cache
New 2.8E, 3.0E etc is prescott processor with 800 mhz fsb, has HT and 1 mb cache.

There is more to list. I may be wrong at some of these but fellow [H]members will probably correct me

 

[mpegripper]

and one note, even though the prescott has more cache, the northwood (C) is better

 

[E4g1e]

2.4A 400 mhz fsb(front side bus) no HT(HyperThreading) 512kb cache

This is incorrect. That CPU is the 2.4 (plain, no letter). The "A" letter designation to 400MHz FSB Northwood P4's apply only to those models at 2.0GHz or slower (The 2.0 and slower P4's with no letter designation were the Willamette CPUs, with a 400MHz FSB and only 256K L2 cache - and no Willamette ever had HT).

2.4B 533 mhz fsb no HT 512 kb cache
2.4C 800 mhz fsb with HT 512 kb cache

New 2.4A is prescott with 533 mhz fsb, no HT, with 1 mb cache
New 2.8E, 3.0E etc is prescott processor with 800 mhz fsb, has HT and 1 mb cache.

There is more to list. I may be wrong at some of these but fellow [H]members will probably correct me

Also, there is a 2.8A, which is exactly the same Prescott with 533MHz FSB, 1MB L2 cache, and no HT.

And there is a plain 2.8 P4, which is a 400MHz FSB Northwood with no HT and 512K L2 cache - but it's an OEM-only part.

As for the 533MHz FSB P4's that lack HT, well, most do. But there is a 3.06GHz P4 with a 533MHz FSB and 512K L2 cache that does have HT.

 

[Lazn_Work]

Hoo boy, (big breath)

P4 family:

1.3-2.0 = Williamette, 400mhz FSB, 256k cache, no HT (junk)

1.6A-2.0A; 2.2-2.8 = Northwood, 400mhz FSB, 512k cache, no HT

2.4b-3.06b = Northwood, 533mhz FSB, 512k cache, no HT (except the 3.06b, it was the only 533mhz cpu with HT)

2.4C-3.4C = Northwood, 800mhz FSB, 512k cache, with HT (very few 3.4C's out there, it may be OEM only)

2.8E-3.4E = Prescott, 800mhz FSB, 1MB cache, with HT

2.4A-2.8A = Prescott, 533mhz FSB, 1MB cache, no HT

Plus there are some strange OEM only exceptions. EG: Intel has provided a few P4's with 64 bit turned on to OEM's for testing, etc.

The Prescott suffers under a 31 stage pipeline (compared to the 20 stage of earlier P4's) so it is a little slower at the same clock speed than the Northwood. But it should reach a higher Ghz eventually.

edit: corrected per E4g1e's post.

==>Lazn

 

[E4g1e]

1.6A-2.8A = Northwood, 400mhz FSB, 512k cache, no HT

One small correction:

1.6A-2.0A; 2.2-2.8 = Northwood, 400mhz FSB, 512k cache, no HT

 

[Stugots]

....Plus there are some strange OEM only exceptions. EG: Intel has provided a few P4's with 64 bit turned on to OEM's for testing, etc.

there are also 400fsb 3.0ghz cpu's that companies like powerleap have and sell for upgrades.

 

[TFR]

Here you go: http://www.techreport.com/cpu/

I think the Prescott 2.4a is missing from the list.

 

[PostalRIT]

Awesome everyone, thanks for the linkage TFR, and all the info Lazn_Work and everyone else. I think I might wait till some new processors from Intel come out. Isn't around Sept they drop in prices? And, what is the current roadmap for Intel w/ new processor releases?

Thanks again for the info.

Postal