Not much known about this CPU but it might be the first S423 CPU out there! Unfortunatly it does not work so it's all guessing what it would be.

Using my home and kitchen plate I measured a 39 gram for this CPU. It's brother QT69ES, a newer working sample, was 40 gram. The difference might be sma... > Read more

An early but working Intel Pentium 4 A2-stepping processor. This model carries the name 'Intel Pentium 4 1.x GHz' but is often referred to as the 800MHz Pentium 4. At the time Intel made this processor it was unclear how fast it could run. The target was probably around 1GHz but because of the unloc... > Read more

This one is the same as this Pentium 4 1.xGHz except for the fact that this one is not working. It misses some pins and the heatsink is quite scratched.... > Read more

My third QT69ES CPU. This one is like this 1.x GHz CPU but has a different production date. It is 2 weeks newer so I wonder if there is any difference (with overclocking for example) between the two.... > Read more

My third 1.5GHz Intel Pentium 4 CPU. This one is practically the same as this 1.5GHz CPU except for the fact that we are dealing with an Engineering Sample. Benchmarking this CPU would be useless as scores are identical to the 1500MHz Willamette in the given ... > Read more

Because I have both the 1300MHz and 1500MHz Pentium 4 for socket 423 the 1400MHz model seems like a nice addition. At the time Intel released these CPU's in November 2000 only the 1400MHz and 1500MHz models were released.

Interesting to see is that this CPU has been made in week 40 of 2000 which ... > Read more

The slowest production Pentium 4 'Willamette'. The Pentium 4 was released at frequencies starting at 1400MHz/1500MHz but Intel decided to ship 1300MHz parts afterwards in early 2001.

In my opinion the Pentium 4 1.3GHz wasn't really justifiable. It was slower than the existing Pentium III and the ... > Read more

Just like this Pentium 4 1.3GHz but with a different sSpec number.... > Read more

Intel launched the Pentium 4 Willamette on November 20, 2000 at 1.4GHz and 1.5GHz. The CPU that would be next in line was the, even slower, 1.3GHz in early 2001. It wasn't until April 23, 2001 for Intel to release the 1.7GHz version. Finally a CPU that was really (overall) faster than it's predecess... > Read more

The first retail Pentium 4's ran at 1,4GHz and 1,5GHz and were released in November 2000. This CPU is made in the 16th week of 2001.... > Read more

Clocked at 1400MHz just like this Pentium 4 1.4GHz. The difference is that this one has been made in the 18th week of 2001 and is based on the C1 core. The other Pentium 4 1.4GHz I have is manufacture before the official launch date and uses the earli... > Read more

The successor of the 180nm 'Willamette' core. This could be the first 'Northwood' stepping out there. The CPU has no sSpec on the heatspreader which makes it difficult to give it an official name.

Check out the benchmarks to see this 'Northwood' crushing the 'Willamette' CPU. Also consider that t... > Read more

An engineering sample of the second fastest 'Willamette' based Pentium 4. The 2GHz would be the top-of-the-line model that would set you back $562. That is $187 more than the 1.9GHz model. A nice premium for that extra 100MHz .

On the S423 platform you can go beyond 2GHz by using PowerLeap adap... > Read more

The slowest official Pentium 4 for S478 socket. It was launched together with the faster models up to 2GHz.

In the wild these 1400MHz is an uncommon CPU. Usually the 1400MHz parts are made to fit the older S423 and it seems that faster models (1,5 to 2,0GHz) were sold more. Especially 1.6, 1.7 an... > Read more

The first Pentium 4 CPU's were based on the Willamette-core and ranged from 1.3GHz to 2.0GHz. The first series all made use of socket 423 but it didn't take long for Intel to start with socket 478. I guess most people associate 478 with the much better 130nm Northwood-core but both Willamette and th... > Read more

Easily overshadowed by AMD's Athlon and Athlon XP processors. The Willamette was not much of a performance king, especially when fitted with slow (but cheap) SDR-SDRAM. Something that happenend a lot in cheap home use systems.... > Read more

Like this Pentium 4 1500 but with a different sSpec number and a Willamette core with C1 stepping.... > Read more

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An interesting 'Northwood' processor clocked at 2GHz! This one has been made in week 45 of 2001 which is 13 weeks before the official announcement of the first Intel Pentium 4 'Northwood' on 7 January 2002.

What makes this sample interesting? Because it has a rework! In the second picture some p... > Read more

Pretty much like this Pentium 4 except that the socket is different. This model is for S478 which is also available for Northwood and Prescott CPU's.... > Read more

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A low clocked Northwood CPU. Ideally for overclocking! Some of these CPU's could run at 2,4GHz by setting the front side bus to 133MHz (QDR533) which is quite an improvement.... > Read more

Some of the lower clocked Pentium 4's with a Northwood core were popular by overclockers. Some could get to the range of 2GHz - 2.2GHz without increasing the vCore so usually there is more headroom left with a little bit more juice. However, do not use excessive vCores on the Northwood CPU's due to ... > Read more

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Same sSpec as this Pentium 4 1.6A but assembled in Costa Rica rather than Malay.... > Read more

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100MHz faster than this Pentium 4 but technically the same.... > Read more

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A one-of-million S478 CPU. Nothing new, nothing special .

This CPU is perfect for filling up the gap between 1.5A GHz 'Northwood', 1.5 GHz Willamette and 2.0A GHz 'Northwood'. The 1.5GHz Willamette will run with 800MHz RIMM's; this 1700MHz S478 is tested with Single Channel DDR (on i845G) and D... > Read more

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Just like this Pentium 4 2.0A engineering sample but as production version.... > Read more

The faster brother of the 2.53GHz QLB2 but otherwise pretty much the same. The 2.53GHz is from the 6th week of 2002; this 2.66GHz version saw it's daylight in week 26.... > Read more

Same as this Pentium 4 but with different sSpec number.... > Read more

I can't really say much about this Pentium 4. It's just like the others but with a different sSpec number.... > Read more

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Pretty much the same as the other 2.4B versions but has a different sSpec number and an old style heatspreader.... > Read more

A decent CPU for it's time (mid 2002), just like the 2.66GHz model. It features a 133MHz (QDR533) front side bus which works out nicely for a Northwood CPU clocked at 2533MHz.... > Read more

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Identical too this CPU except for it's production date. This specific model is made in 2002 (the 52th week of 2002 to be more exact). When the 3.06GHz was new it was the fastest production CPU of 2002 so it's nice to have an actual CPU that has been made in ... > Read more

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Released in November 2002; the first production x86 CPU to hit (and exceed) 3GHz and the first to have Hyper Threading Technology enabled.

Hyper Threading was introduced in early 2002 for the server environment (Xeon's). With the launch of the Pentium 4 3.06 GHz they brought the technology to the... > Read more

Just a normal desktop version of the Intel Pentium 4. This one has a 133MHz (DDR533) FSB and a C1 'Northwood' core. In other words: in idle modus this CPU won't use much energy.

The CPU came along with a HP/Compaq DC310 machine, a simple desktop PC with Intel integrated graphics which runs quiet ... > Read more

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Runs just like the other 2.4B versions but has a different sSpec number.... > Read more

In the line-up of Pentium 4 processors with a 200MHz (QDR800) front-side-bus, this 2.4GHz model is the slowest available with that busspeed.... > Read more

A 2.4 GHz Pentium 4 with D1 Northwood core. The D1 core has a few improvements over the C1 core.... > Read more

This CPU with C1 core is one week older than my newest Pentium 4 2.4B CPU with D1 core. It's not uncommon for a CPU manufacturer to ship two (or more) versions of practically the same CPU.... > Read more

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An interesting CPU if I may say so. This particular model, of which more than 200 are made according to various sources, has been fabricated in the 42th week of 2003 (13 Oct ~ 19 Oct) which makes it an early sample. The very first Prescott release was on 2 February 2004.

The Prescott core is the... > Read more

Just like this Pentium 4 2.66 but with a newer core (stepping D1 instead of C1).... > Read more

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The Intel Prescott released on 2 February 2004 as successor of the Pentium 4 'Northwood'. This particular engineering sample is made in the 46th week of 2003 which is mid-November 2003. The C0-stepping like this CPU is the stepping that was production-ready and eventually found it's way into CPU's l... > Read more

Practically identical to the QJ85ES except this QJ86ES runs at 16x200 (3.2GHz). They both are equipped with a C0-Prescott core and both are from the 46th week of 2003.... > Read more

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Right at the 3GHz spot! The 3.0 GHz Northwood can be considered a successful processor that offered enough performance for quite some time.... > Read more

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An engineering sample from the fourth week of 2004. In this period Intel also officially announced the first Pentium 4 'Prescott' processors. I guess this CPU would've been shipped to reviewers or system integrators for test and evaluation purposes. The core is D0-stepping which represents the first... > Read more

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The Prescott 3600MHz was the top-of-the-line Pentium 4 for quite a while (until the 3800MHz came along but that took a while) and especially in the 11th week of 2004 the 3.6GHz was Intel's fastest desktop CPU.

This engineering sample is just a few weeks newer than the release of the first Pentiu... > Read more

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A regular production Pentium 4 2.8GHz with an interesting twist: it runs on a 100MHz (QDR400) FSB! Most 2.8 GHz parts use a 200MHz (QDR800) FSB and the 'old' high-end use the 133MHz (QDR533) FSB. For a 2.8 GHz part it makes sense to use a 133MHz bus or higher to avoid creating bottlenecks. Intel als... > Read more

This 3.0E also runs at 3 GHz like the Pentium 4 3.0 but has a Prescott core. The Prescott core is made with 90nm technology whereas the Northwood uses 130nm. Normally this would mean that the CPU runs cooler but Prescott proves that the opposite can be true.... > Read more

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200MHz faster than the 3GHz barrier. People often bought the 3GHz because it sounds a lot faster than 2.8GHz and was not as expensive as the 3.2GHz Sounds weird? Well, 3GHz just looks like a good mark .... > Read more

An engineering sample from the fourth week of 2004. In this period Intel also officially announced the first Pentium 4 'Prescott' processors. I guess this CPU would've been shipped to reviewers or system integrators for test and evaluation purposes. The core is D0-stepping which represents the first... > Read more

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A Pentium 4 2GHz 'Northwood' from the 32th week of 2004; a late one! In early 2004 Intel released the 'Prescott' and 3GHz+ chips were commonplace.

This CPU was fitted on a Protech Prox1750 G2 motherboard which features one 16-it ISA slot. The (medical) application this PC was built for didn't nee... > Read more

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Technically identical to this Pentium 4 but with a slightly more refined finish/top heatspreader. Despite having the same sSpec-number they aren't identical on the outside. This CPU has been assembled in the Philippines. The other one in Costa Rica and for s... > Read more

An engineering sample running at 3.06 GHz with an utterly low front side bus of 133MHz (QDR533). In the end of 2002 Intel released the first 3GHz+ (3.06 GHz) Northwood CPU with Hyperthreading. Back then it used the 133MHz (QDR533) bus as it was normal for the time and 200MHz (QDR800) motherboards we... > Read more

The fastest regular Pentium 4 released runs at 3800MHz; just like this engineering sample. I've been using this CPU in my test system for a while and it runs great. It's speed is nowhere comparable with newer Core 2 Quad, Core i7 or Phenom II X4 CPU's but with a clean, newly installed operating syst... > Read more

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Just a normal Pentium 4 3GHz Prescott with D0 core.... > Read more

A hot running 3400MHz Pentium 4 Prescott with 2MB L2-cache but still quite a performer in the end of 2004.... > Read more

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E0-stepping of the Pentium 4 540. In early 2004 the Prescott was running very hot and Intel quickly came with new revisions that had improvements. It's not faster nor slower than the Pentium 4 540 D0-stepping but just a tad cooler (but still running quite ho... > Read more

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An engineering sample of the slowest Pentium 4 'Prescott' that uses the model-numbers for speed indication. The slowest 'Prescott', running at 2.4GHz is designated as Pentium 4 2.4A.... > Read more

Just a normal Pentium 4 3GHz Prescott with E0 core. The E0 stepping (with J in the name/model number) should be about 20% cooler than it's predecessors.... > Read more

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An unopened Pentium 4 2.4A box. It has a socket 478 'Prescott' CPU inside which has a production date of mid-2005! Mid-2005 were the days of the first dual-core CPU's and Athlon64's running at 3500+ ratings or higher. I wonder who, in 2005, had interest in an 'old' 2.4GHz Pentium which has been on t... > Read more

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Identical too this CPU. It has the same sSpec.... > Read more

Same as, but also opposite of the 2.8 GHz engineering sample.

This CPU is more than two years newer and uses the latest Prescott core (G1). The engineering sample uses one of the first cores (A4) and was made weeks before the official launch of the Prescot... > Read more

A late 3GHz Prescott (3th week of 2006) with 2MB L2-cache. The extra L2-cache might give this CPU a boost with games and such.... > Read more

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The 'Cedar Mill' core was released on January 5, 2006; about half a year before the Core 2 Duo hit the market. Basically this 3GHz Pentium 4 631 is a die-shrink of the Prescott-core from 2004 (but with 2MB L2-cache). Sometimes it's said that technology development continues at a rapid pace but this ... > Read more