Intel's Pentium 4 E: Prescott Arrives with Luggage
by Anand Lal Shimpi & Derek Wilson on February 1, 2004 3:06 PM EST- Posted in
- CPUs
Final Words
If you’re looking for nothing more than a purchasing decision let’s put it simply: if you’re not an overclocker, do not buy any Prescott where there is an equivalently clocked Northwood available. This means that the 2.80E, 3.00E, 3.20E are all off-limits, you will end up with a CPU that is no faster than a Northwood and in most cases slower. If you are buying a Pentium 4 today, take advantage of the fact that vendors will want to get rid of their Northwood based parts and grab one of them.
Overclockers may want to pick up a Prescott to experiment with ~4GHz overclocks – it will be easier on Prescott than it is on Northwood. And once you get beyond currently available Northwood speeds you will have a CPU that is just as fast if not faster, depending on how high you go.
When you include AMD in the picture, the recommendation hasn’t changed since the Athlon 64 was introduced. If you find yourself using Microsoft Office for most of your tasks and if you’re a gamer the decision is clear: the Athlon 64 is for you. The Pentium 4 continues to hold advantages in content creation applications, 3D rendering and media encoding; if we just described how you use your computer then the Pentium 4 is for you, but the stipulation about Northwood vs. Prescott from above still applies.
The Pentium 4 Extreme Edition at 3.4GHz does provide an impressive show, but at a street price of over $1100 it is tough recommending it to anyone other than Gates himself.
With the recommendations out of the way, now let’s look at Prescott from a purely microarchitectural perspective.
Given that we’re at the very beginning of the 90nm ramp and we are already within reach of 4GHz, it isn’t too far fetched that Prescott will reach 5GHz if necessary next year. From an architecture perspective, it is impressive that Prescott remains in the same performance league as Northwood despite the fact that it has a 55% longer pipeline.
What we have seen here today does not bode well for the forthcoming Prescott based Celerons. With a 31 stage pipeline and 1/4 the cache size of the P4 Prescott, it doesn’t look like Intel will be able to improve Celeron performance anytime soon. We will keep a close eye on the value segment as it is an area where AMD could stand to take serious control of the market.
The performance of Prescott today is nothing to write home about, and given the extensive lengthening of the pipeline it’s honestly a surprise that we’re not castrating Intel for performance at this point. Prescott is however a promise of performance to come; much like the Willamette and even Northwood cores were relatively unimpressive at first, they blossomed into much sought-after CPUs like the Pentium 4 2.4C. The move to 90nm and a longer pipeline will undoubtedly mean more fun for the overclocking community, especially once production ramps up on Prescott.
Just as was the case with the very first Pentium 4s, Prescott needs higher clock speeds to spread its wings - our data on the previous page begins to confirm this. To put it bluntly: Prescott becomes interesting after 3.6GHz; in other words, after it has completely left Northwood’s clock speeds behind.
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terrywongintra - Monday, February 2, 2004 - link
anybody benchmark prescott over northwood in entry-server environment? i'm installing 3 servers later by using intel 875p (s875wp1-e) entry server board n p4 2.8, need to decide prescott or northwood to use.sipc660 - Monday, February 2, 2004 - link
i don't understand why some people are bashing such a good inovation that was long overdue from intel.a pc that doubles as a heater and at only 100-200W power consumption.
Let me remind you that a conventional fan heater eats up a kilowatt/hour of power.
Think positive
* space reduction
* enormous power savings (pc + fan heater)
* extremly sophisticated looking fan haeter
* extremly safe casing. reduces burn injuries
to pets and children.
* finely tunable temperature settings (only need
to overclock by small increments)
* coupled with an lcd it features the best
looking temperature adjustment one has ever
witnessed on a heater
* child proof as it features thermal shutdown
* anyone having a laugh thus far
* will soon feature on american idol
the worst singers will receive one p4 E based
unit each. That should make people
think twice about auditioning thus making
sure only true talent shows up.
* gives dell new marketing potential and a crack
at a long desired consumer heating electronic
* amd is nowhere near this advancement in thermal
thechnology leaving intel way ahead
hope you enjoyed some of my thoughts
Other than that good article and some good comments.
on another note i don't understand why people run and fill intels pockets so intel can hide their engineering mistakes with unseen propaganda, while there is an obvious choice.
choice is Advanced Micro Devices all until intel gets their act together.
go amd...
Stlr22 - Monday, February 2, 2004 - link
INTC - "Intel roadmap says Prescott will hit 4.2 GHz by Q1 '05. My guess is that it is already running at 4 GHz but just needs to be fine tuned to reduce the heat."Maybe they are trying to keep it under the 200watt mark? ;-)
INTC - Monday, February 2, 2004 - link
I think CRAMITPAL must have sat on a hot Prescott and got it stuck where the sun doesn't shine - that would explain all of the yelling and screaming and friggin this and friggin that going on. "Approved mobo, approved PC case cooling system, approved heatsink & fan - and you better not use Artic Silver or else it will void your warranty..." gee - didn't we just hear that when Athlon XPs came out? It brings to mind when TechTV put their dual Athlon MP rig together and it started smoking and catching on fire when they fired it up the first time on live television during their show.Intel roadmap says Prescott will hit 4.2 GHz by Q1 '05. My guess is that it is already running at 4 GHz but just needs to be fine tuned to reduce the heat. I bet the experts (or self proclaimed experts such as CRAM) were betting that Northwood could not hit 3 GHz and look where it is at today. Video card GPUs today are hitting 70 degrees C plus at full load but they do fine with cooling in the same PC cases.
CRAMITPAL - Monday, February 2, 2004 - link
Dealing with the FLAME THROWER's heat issues is only one aspect of Prescott's problems. The chip is a DOG and it requires an "approved Mobo" and an "approved PC case cooling system", a premo PSU cause the friggin thing draws 100+ Watts and this crap all costs money you don't need to spend on an A64 system that is faster, runs cooler, and does both 32/64 bit processing faster. How difficult is THIS to comprehend???Ain't no way Intel is gonna be able to Spin this one despite the obvious "press material" they supplied to all the reviewers to PIMP that Prescott was designed to reach 5 Gigs. Pigs will fly lightyears before Prescott runs at 5 Gigs.
Time to GET REAL folks. Prescott sucks and every hardware review site politely stated so in "political speak".
Stlr22 - Monday, February 2, 2004 - link
((((((((((((CRAMITPAL)))))))))))))))It's ok man. It's ok. Everything will be alright.
;-)
scosta - Monday, February 2, 2004 - link
#38 - About your "Did anyone catch the error in Pipelining: 101?".There is no error. The time it takes to travel the pipelane is just a kind of process delay. What matters is the rate at witch finished/processed results come out of the pipeline. In the case of the 0.5ns/10 stage pipelane you will get one finished result every 0.5ns, twice as many as in the case of the 1ns/5 stage pipeline.
If the pipelines were building motorcycles, you woud get, respectively, 1 and 2 motorcycles every ns. And that is the point.
LordSnailz - Monday, February 2, 2004 - link
I'm sure the prescotts will get hotter as the speed increases but you can't forget there are companies out there that specializes in this area. There are 3 companies that I know of that are doing research on ways to reduce the heat, for instance, they're planning on placing a piece of silicon with etch lines on top of the CPU and run some type of coolant through it. Much like the radiator concept.My point is, Intel doesn't have to worry about the heat too much since there are companies out there fighting that battle. Intel will just concentrate on achieving those higher speeds and the temp control solution will come.
scosta - Monday, February 2, 2004 - link
You can find thermal power information in the also excelent "Aces Hardware" Prescot review here:[L=myurl]http://www.aceshardware.com/read.jsp?id=60000317[/l]
In resume, we have the following Typical Thermal Power :
P4 3.2 GHz (Northwood) - 82W
P4E 3.2 GHz (Prescot) - 103W
Note that, at the same clock speed and with the same or lesser performance, the Prescot dissipates 25% more power than Northwood. This means that with a similar cooling system, the Prescot has to run substancially hoter.
As AcesHardware says,
[Q]After running a 3DSMax rendering and restarting the PC, the BIOS reported that the 3.2 GHz Northwood was at about 45-47°C, while Prescott was flirting with 64-66°C. Mind you, this is measured on a motherboard completely exposed to the cool air (18°C) of our lab.[/Q]
So, what will the ~5GHx Prescot dissipate? 200W ?
Will we all be forced to run PCs with bulky, expensive, etc, criogenic cooling systems?. I for one wont. This power consumption escalation has to stop. Intel and AMD have to improve the performace of their CPUs by improving the CPU archytecture and manufacturing processes, not by trowing more and more electrical power at the problem.
And those are my 2 cents.
CRAMITPAL - Monday, February 2, 2004 - link
Prescott will never go above 3.8 Gig. even with the 3rd revision of the 90 nano process. Tejas will make it to just over 4.0 Gig. with a little luck but it won't be anything to write home about either based on current knowledge.Intel has fallen and can't get it up!