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 smaller then 1 gram as the plate is not that precise. Despite that it's safe to assume this CPU has the guts and thus a Willamette core in it.

The CPU fits easily along in the socket but doesn't get warm. Neither the board seems to be able to do anything with the CPU. The indicator leds on the MSI 850 Pro2 stay red instead of turning into green.

The CPU has very few markings on the heatspreader. This makes it difficult to name it (there is no sSpec number for example). On the heatspreader I only read 'D9356087' and '0090' along with an indentifier pattern. > Read more

The very first working Intel Pentium 4 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 unlocked multiplier the CPU boots up using the lowest multiplier, which is 8x.

In 1998, when the Intel Pentium II and AMD K6/2 were brandnew, Intel started developing the 'Netburst' micro architecture. Due to delays the first retail CPU was released in November 2000. This engineering sample with sSpec number 'QT69ES' was made in the 17th week of 2000.

The 'Netburst' micro architecture was a brand new design but was not so speedy at all. The AMD Athlon 'Thunderbird' and even the old Intel Pentium !!! 'Coppermine' was actually faster! A 1GHz Athlon or Pentium !!! outperforms a 1GHz Willamette with ease and as since the first retail Intel Pentium 4 hit the shelves with only 1,4GHz and 1,5GHz it was no wonder the 1200MHz Athlon was able to compete. Especially in price/performance as the Intel Pentium 4 used (and needed for performance, models with SDR-SDRAM are slow) expensive RD-RAM while the Athlon ran happily with DDR-SDRAM.

Interesting notes regarding my 1.xGHz engineering sample: it has a fully unlocked multiplier which is not often found on Pentium 4 engineering samples. The heatspreader is different comparing to a regular S432 Willamette. The CPU is not quite able to run at high clock frequencies or high temperatures and despite the low clock frequency and low core voltage it runs quite hot. It goes to 50C with ease and the chip will probably crash when it's 60C! The chip also lacks a CPU string which means that software can't tell which CPU exactly fits into the system. When setting a regular Pentium 4 1,5GHz to 1,6GHz it would still show 1,5GHz in the string; this CPU will show the actual frequency.

Older Pentium 4's do exist but as far as I'm aware of they are non-functional. Check out this S423 CPU. It looks pretty much the same. Slightly different PCB and very few markings on the heatspreader.
> 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

The slowest production Pentium 4 'Willamette'. The Pentium 4 was released at frequencies starting from 1400MHz but Intel decided to ship 1300MHz parts afterwards. > 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 dates back to the first week of October 2000. In my agenda October is the 10th month and November the 11th meaning this CPU has been made, for production market, one month before it's release. > Read more

Just a regular Intel Pentium 4 'Willamette' CPU.

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.

I bought this CPU because I didn't have any regular socket 423 CPU. In case I had to test something (a motherboard, or techniques like Thermal Throttling) I'd rather test this CPU then an unique engineering sample. > 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 the 'Willamette' is using 800MHz RIMM's while lot's of 'Willamette' systems in the old days were sold with less expensive SDR-SDRAM. Of course the SDR-SDRAM is a lot slower. The 'Northwood' uses mainstream DDR-SDRAM which has a better price/performance ratio.

This CPU will work in a HP/Compaq D310 but the BIOS does warn me about a missing microcode and tells me to consider contacting Compaq for a BIOS upgrade to support the 'new CPU'. CPU-z does not detect the CPU correctly.

In my EPoX EP-4PGM2I I have a fully unlocked multiplier. I can easily boot up at any range between 12x to 18x using a 100MHz FSB. 19x is getting tricky and 20x won't work anymore. > 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 link.

This CPU does work but turned out to be less compatible with my MSI 850 Pro2 motherboard and has technical problems. With difficulties I could get it running at only 800MHz (8x100) instead of the full 1500MHz. I booted it at 1500MHz once but highly unstable. Booting Microsoft Windows 2000 SP4 didn't work quite well, I got an 'hard error' at the time the desktop should pop up. In the BIOS I noticed the CPU temperature was 0C. It got the correct values when I pushed somewhere on the heatspreader. For testing purposes I grabbed an Intel Desktop Board with i850 chipset of the shelf to give it a go. Now it booted up at 1500MHz at once . I didn't bother installing the Intel Desktop Board into my PC and install everything so no CPUz screenshot or whatsoever.

In this case the Intel Desktop Board turned out to be the solution to get this CPU running properly. But beware that the board doesn't support multipliers lower then 12x. Running CPU's like the QT69ES is not advisable as you would 'overclock' (in case that's possible with an unrated CPU) it to 1200MHz which is most likely to fail. Not to mention you're stressing up the old chip to the maximum (at the day I figured that the board didn't go for low multipliers my QT69ES booted up once, after many tries and not hoping the CPU was defect, at 1200MHz). > 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

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

> Read more

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 and Dual Channel DDR.

As we all know Intel's 'Netburst'-micro architecture adores lot's of memory bandwidth. It won't surprise anyone that a Dual Channel DDR setup will be faster then Single Channel. But what about, expensive, 800MHz RIMM's? > Read more

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

> Read more

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 pins are highlighted. Look close and see that pin D2 and D3 are connected using soldering. Pin D2 is named 'BPRI#' which is something with the Clock Input of the AGTL+. AGTL+ is the front-side-bus of the Pentium 4. D3 is some sort of 'power/voltage' pin. I wonder why the rework was needed. My older 1.5GHz 'Northwood' (Very early A1 stepping) doesn't have this rework.

My EPoX EP-4PGM2I works fine with this CPU and shows 'Intel(R) Pentium(R) 4 Family CPU 2.00A GHz(100x20)'. I guess it can't really determine the type of CPU so it shows 'Family' instead. > Read more

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

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 and reliable. > Read more

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

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

> 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

An interesting CPU if I may say so. This particular model, of which more than 200 are made, 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 third Pentium 4 core Intel made. The Pentium 4 started with the Willamette and featured clock frequencies up to 2GHz. Northwood was Intel's second version of the P4-core and had more L2 cache and was made on the 130nm process. These optimalisations allowed Intel to get more speed per MHz and increase the clockfrequency, eventually to 3400MHz. Each new core showed a pattern of improvement, Prescott did not.

Prescott featured bigger L1 and L2 caches, had better branch-prediction, improved HyperThreading, new instructions, longer pipelines (31 stages) and was made using the smaller 90nm process. All kinds of ingredients to make a worthy successor for the aging Northwood core with a 20-stage pipeline. With the longer pipelines, Prescott should be able to scale better to higher frequencies. Don't forget that Intel targetted the final Pentium 4 at 10GHz so Prescott should be a good improvement and perhaps reach somewhere around 5GHz. Successors of the Prescott would then continue the path to 10GHz.

All those ingredients were tackled someway or another. The longer pipelines made the processor slower per MHz (it can do less with every MHz it has). A 2,8GHz Northwood CPU is a few percents faster then the 2,8GHz Prescott. From 3,2GHz / 3,4GHz Prescott starts to show it's muscles. Unfortunately scaling was limited due to excessive heat production of the processor.

To summarize: Prescott wasn't such a success in the beginning. The only trade-off was for Intel as it could produce the Prescott for much less as it was made with 300mm wafers instead of 200mm wafers. Northwood was made using 200mm wafers.

After Prescott evolved heat generation was reduced by more then 20%. Despite that Prescott never reached the 4GHz barrier. It was sold at max. 3,8GHz. This old engineering sample can reach ~3,7GHz using watercooling but it's highly unstable. Only the best and finest cores were sold at 3,6GHz. the 3,8GHz version appeared later and used the newer Prescott cores with less heat output. > 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 Prescott CPU. Also don't forget that the launch of the Core 2 Duo was only half a year away making this a late slow Prescott CPU.

Also notice that this CPU has been made in the 53th week of 2005; 2005 didn't have a 53th week . > Read more

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

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. Especially the early Prescott's (like this one) run quite hot.

If you want to read more Prescott talk: see the 2.8 GHz Prescott engineering sample . > Read more

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

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

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 because it was normal for the time and 200MHz (QDR800) motherboards weren't available yet. In the 35th week of 2004 that was a different story because QDR800 parts were widely available, even for budget systems. What a pity that all this has to run with such a slow front-side-bus. > Read more

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

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

This is serious Prescott reviewing business. 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 Pentium 4 Prescott and because it's early silicon it will run hot. Good cooling is necessary to keep it stable. This CPU doesn't seem to do Thermal Throttling (inserting dummy cycles to get the CPU coooler which also degrades performance) when it reaches 73C. Instead it just keeps getting hotter when stressing with Orthos until it reaches about 84C and Orthos crashes due instability of the CPU. Willamette cores start Thermal Throttling at 73C. > Read more

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

I noticed that this CPU runs a lot cooler than my 3.6GHz Pentium 4. Intel did a good job by optimizing the first batch of Pentium 4's . It's not surprising that Intel couldn't release a 3.8GHz before because it would need good cooling, consume too much power (more than people were used to at that time. The newer Pentium D 800-series consumed more power!) and Intel simply didn't have the correct chips for it. > Read more