Meng-Chieh
Weaksauce
- Joined
- Apr 15, 2004
- Messages
- 65
Hi. I was looking up a processor for my comp when I noticed that for Pentium 4 it says 3.2CGHz - what is C?
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CGHz?
- Thread starter Meng-Chieh
- Start date
It's a version or addition, theres 5 pentium 4 editions for desktop computers, A B C E and EE, C being the best for overclocking, not counting the prescott 2.4a, E and EE being ungodly expensive... or maybe E and EE are the same one i don't remember, i got the point acrossed
RancidWAnnaRIot
EspantaPajaros
- Joined
- Feb 19, 2004
- Messages
- 11,033
C is Northwood, E is the prescott.. EE is the P4 "Extreme Edition".. i call it the "Expensive Edition" I believe the EE has a 2 MB cache and some other crazy stuff.
C and E at the moment have about the same performance. C runs cooler so you might like it for overclocking. E won't be any good for another year or so.. maybe more. E has some features that aren't being taken advantage of by software developers.
Like i said.. i would go with the C at the moment.
the EE is ridiculously expensive.
I'm not aware of any A, or B... i think the B might be the celeron.. but yeah that's it.
C and E at the moment have about the same performance. C runs cooler so you might like it for overclocking. E won't be any good for another year or so.. maybe more. E has some features that aren't being taken advantage of by software developers.
Like i said.. i would go with the C at the moment.
the EE is ridiculously expensive.
I'm not aware of any A, or B... i think the B might be the celeron.. but yeah that's it.
RancidWAnnaRIot
EspantaPajaros
- Joined
- Feb 19, 2004
- Messages
- 11,033
hehe .. i currently have a 2000+ AMD palomino.. it runs pretty damn hot i must say.. it's not overclocked or anything
Black Morty Rackham
Supreme [H]ardness
- Joined
- Jan 8, 2004
- Messages
- 4,728
The new Prescott 2.4A overclocks like a sonofabitch on speed. 
First, there was the Willamette. 180 nm, 400 MHz FSB, 256 KB L2, mlar. They ate PC800 RDRAM. They ranged from 1.5 at launch, down to 1.3, up to 2.0.
Then there was the Northwood A. 130 nm, 400 MHz FSB, 512 KB L2. I bought a Northy 2.2 A at launch. They also ate PC800 RDRAM. They ranged from 2.2 at launch, down to 1.6, up to 2.6 (or was it 2.4?)
Then there was the Northwood B. 533 MHz FSB, eating PC1066 RDRAM. They launched at 2.53, I think, and went up to 3.06. The 3.06 B was special; it was B/HT. The Willy and the older Northies had HT on the die, but nonfunctional/not enabled.
Now there is the Northy C. 800 MHz FSB, eating dual channel DDR400. Every Northy C has HT. They launched at 3.0, I think, and are now at 3.4.
The Northy EE is a Northy C coupled with 2 MB L2 cache. Performance monsters and rather expensive.
The Prescott is 90 nm, 800 Mhz FSB, 16 KB L1 and 1MB L2, plus significant architectural changes. It performs about the same as a Northy C, emits somewhat more heat, and has improved hyperthreading as well as SSE3. These first Prescotts are called E.
Confusingly, there is also the Prescott 2.4 A, which runs on the 533 Mhz FSB and does not have hyperthreading.
Then there was the Northwood A. 130 nm, 400 MHz FSB, 512 KB L2. I bought a Northy 2.2 A at launch. They also ate PC800 RDRAM. They ranged from 2.2 at launch, down to 1.6, up to 2.6 (or was it 2.4?)
Then there was the Northwood B. 533 MHz FSB, eating PC1066 RDRAM. They launched at 2.53, I think, and went up to 3.06. The 3.06 B was special; it was B/HT. The Willy and the older Northies had HT on the die, but nonfunctional/not enabled.
Now there is the Northy C. 800 MHz FSB, eating dual channel DDR400. Every Northy C has HT. They launched at 3.0, I think, and are now at 3.4.
The Northy EE is a Northy C coupled with 2 MB L2 cache. Performance monsters and rather expensive.
The Prescott is 90 nm, 800 Mhz FSB, 16 KB L1 and 1MB L2, plus significant architectural changes. It performs about the same as a Northy C, emits somewhat more heat, and has improved hyperthreading as well as SSE3. These first Prescotts are called E.
Confusingly, there is also the Prescott 2.4 A, which runs on the 533 Mhz FSB and does not have hyperthreading.
Letters
cores/cache:
A-C = Northwood core (L2 512k Cache)
E = Prescott core (L2 1MB cache)
EE = "Extreme Edition" (L3 2MB cache)
Bus speeds:
A = 400mhz *(There is a 2.4A 533mhz prescott core)
B = 533mhz
C = 800mhz
E = 800mhz
EE = 800mhz
NO letters
Willamette Core = L2 256k cache/ 400mhz bus
HT:
A = NO HT
B = ONLY 3.06ghz (3.06ghzB) 533mhz HAVE HT
C = Have HT
E = 2.8ghz MAY OR MAY NOT have HT, the rest have HT
EE = HT
cores/cache:
A-C = Northwood core (L2 512k Cache)
E = Prescott core (L2 1MB cache)
EE = "Extreme Edition" (L3 2MB cache)
Bus speeds:
A = 400mhz *(There is a 2.4A 533mhz prescott core)
B = 533mhz
C = 800mhz
E = 800mhz
EE = 800mhz
NO letters
Willamette Core = L2 256k cache/ 400mhz bus
HT:
A = NO HT
B = ONLY 3.06ghz (3.06ghzB) 533mhz HAVE HT
C = Have HT
E = 2.8ghz MAY OR MAY NOT have HT, the rest have HT
EE = HT
The 2.4A 533MHz Prescott does NOT have HT. Check the [H]ardOCP review on the 2.4A Prescott. Why Intel didn't give it HT I'll probably never know.
All the rest of the Prescotts are 800MHz FSB parts and have HT. The 2.4A is special.
Also while for some reason they refer to the 3.2EE and 3.4EE as Northwoods they are actually a cross between Northwoods and Gallatin Xeon chips. Hence the L3 cache. Where as Northwood cores never have had L3. So EE Pentium 4's have the standard L1 and L2 of Northwood and also have an additional L3 cache like it's Xeon Gallatin cousins.
mewannafastpc
Gawd
- Joined
- Sep 27, 2003
- Messages
- 768
there's gonna be 533mhz bus version of the 2.8 that won't have HT either
it's on the anandtech intel roadmap
[STL]
> Uh, all Prescott-2.8s should have HT. I have heard no reports
> otherwise.
[Sir-Fragalot]
> The 2.4A 533MHz Prescott does NOT have HT.
I said 2.8.
> All the rest of the Prescotts are 800MHz FSB parts and have HT.
... which is what I said.
[mewannafastpc]
> there's gonna be 533mhz bus version of the 2.8 that won't have HT
> either
> it's on the anandtech intel roadmap
Well, it's not out yet.
> Uh, all Prescott-2.8s should have HT. I have heard no reports
> otherwise.
[Sir-Fragalot]
> The 2.4A 533MHz Prescott does NOT have HT.
I said 2.8.
> All the rest of the Prescotts are 800MHz FSB parts and have HT.
... which is what I said.
[mewannafastpc]
> there's gonna be 533mhz bus version of the 2.8 that won't have HT
> either
> it's on the anandtech intel roadmap
Well, it's not out yet.