Roadmap Update: Pentium 4 6xx now with Enhanced Speed Step
by Kristopher Kubicki on September 1, 2004 9:57 PM EST- Posted in
- CPUs
Although we are always excited to see new processor lineups from Intel, this weeks APAC roadmap showed us the most ambitious processor rollout since Prescott.
For starters, Intel will release 4 new SKUs of Socket 775 processors based on 2MB L2 cache revisions of the Prescott core. However, the new 6xx processors are not just Prescotts with extra L2 cache slapped on them. In fact, the most interesting addition we noted with these new processors is the addition of Enhanced Speed Step Technology (EIST, also known as ESS depending on your circles). Up until now, EIST has been limited only to Pentium M processors. For those not familiar with EIST, it is simply a feature which allows a user to dynamically clock the processor during operation; very much like AMD's Cool 'n Quiet. This would certainly be a welcomed addition to the NetBurst architecture as cooling issues are more and more prevalent as Prescott ramps up.
| Intel Desktop Lineup LGA775 | ||||
| Processor | Speed | Cache | FSB | Launch Date |
| Pentium 4 XE 3.73GHz | 3.73GHz | 2MB | 1066MHz | Late Q4'04 |
| Pentium 4 XE 3.46GHz | 3.46GHz | 1MB | 1066MHz | Nov 2004 |
| Pentium 4 670 | 3.80GHz | 2MB | 800MHz | Q1'05 |
| Pentium 4 660 | 3.60GHz | 2MB | 800MHz | Q1'05 |
| Pentium 4 650 | 3.40GHz | 2MB | 800MHz | Q1'05 |
| Pentium 4 640 | 3.20GHz | 2MB | 800MHz | Q1'05 |
| Pentium 4 580J | 4.00GHz | 1MB | 800MHz | Q1'05 |
| Pentium 4 570J | 3.80GHz | 1MB | 800MHz | Q4'04 |
| Pentium 4 560J | 3.60GHz | 1MB | 800MHz | Q3'04 |
| Pentium 4550J | 3.40GHz | 1MB | 800MHz | Q3'04 |
| Pentium 4 540J | 3.20GHz | 1MB | 800MHz | Q3'04 |
| Pentium 4 530J | 3.00GHz | 1MB | 800MHz | Q3'04 |
| Pentium 4 520J | 2.80GHz | 1MB | 800MHz | Q3'04 |
Oddly, this feature which we consider one of the strongest advantages of the 6xx processor line goes completely unmentioned aside from a few footnotes in the entire roadmap. Unfortunately, one disadvantage we saw of the processor was the 800MHz front side bus. These chips are slated to launch with the 1066MHz FSB capable Glenwood/Lakeport chipsets, and that gives us little hope that we will see many 1066FSB processor launches in the near future other than Pentium 4 Extreme Edition 3.46 and 3.73. It seems the Pentium 4 720J (Pentium 4 Extreme Edition 3.73) that we mentioned in our previous roadmap update is no longer refered to as Pentium 4 720J. The Pentium 4 580 and 570 have also been pushed back a quarter.
The same cryptic "Smithfield" introduction page was found in this roadmap as well. You can check out the original we published here on AnandTech last month.
The Celeron lineup is also finally launching on the Socket 775 socket as well. The new processors, ranging from model 325 to 350, will begin deployment in a few weeks. Even though the Socket 478 Celeron roadmap continues well into Q2'05, we will only see new Celeron model releases on Socket 775; but as an added bonus all Socket 775 Celerons support the XD/NX bit. We have some future articles discussing the advantage and practicality of XD/NX and we will discuss those more in the future.
| Intel Budget Desktop Lineup LGA775 | ||||
| Processor | Speed | Cache | FSB | Launch Date |
| Celeron D 350 | 3.20GHz | 256KB | 533MHz | Q1'05 |
| Celeron D 345 | 3.06GHz | 256KB | 533MHz | Nov 2004 |
| Celeron D 340 | 2.93GHz | 256KB | 533MHz | Soon |
| Celeron D 335 | 2.80GHz | 256KB | 533MHz | Soon |
| Celeron D 330 | 2.66GHz | 256KB | 533MHz | Soon |
| Celeron D 325 | 2.53GHz | 256KB | 533MHz | Soon |
Finally, we have a few teasers about Lakeport and Glenwood. As we have mentioned in the past, Glenwood (akin to Alderwood; i925) will act as the "high" end Intel core logic. Lakeport (akin to Grantsdale; i915) will assume the lower end position. Details were skimp other than the new chipsets will both support PCIe, 7.1 channel audio, dual channel DDR2-667 and the ICH7 southbridge. 667MHz DDR2 looks extremely unambitious on Intel's behalf; particularly since we have DDR2-667 modules now and promises from SiS, ATI and VIA to deliver DDR2-800 within 6 months. Release dates for Glenwood/Lakeport stand at Q2'05.
More on XD, EIST and Pentium M later in the week!
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IntelUser2000 - Thursday, September 2, 2004 - link
"In fact, the most interesting addition we noted with these new processors is the addition of Enhanced Speed Step Technology (EIST, also known as ESS depending on your circles). Up until now, EIST has been limited only to Pentium M processors. For those not familiar with EIST, it is simply a feature which allows a user to dynamically clock the processor during operation; very much like AMD's Cool 'n Quiet."There is several versions of Enhanced Speed Step Technology.
The first Speed Step capable chip was Pentium III Mobile(Coppermine Mobile), clocking permanently down when in battery power, eg, 1GHz runs at 700MHz on battery power.
The second Speed Step(called Enhanced Speed Step) was featured on Pentium III-M(Tualatin Mobile), while was able to change between two speeds depending on load, eg, 1.2GHz at high demand or 800MHz low demand.
The Pentium 4-M's(not the desktop chip with the speedstep, P4-M is the desktop chip with lower TDP AND SpeedStep) used Pentium III-m's Enhanced SpeedStep technology.
The Third generation of SpeedStep is used on Pentium M, used in Centrino bundle laptops. It has 6 speed grades to switch to depending on demand. But there is more.
Link: http://www.intel.com/technology/itj/2003/volume07i...
"A simple, yet effective method that was pursued in order to reduce power was to identify idle logic and shut it off. This was done locally and globally."
The Pentium 4's with Enhanced Speed Step Technology will use technology from Nocona core Xeon.
"Enhanced Intel Speedstep Technology allows the system to dynamically adjust processor voltage and core frequency, which results in decreased power consumption, which results in decreased heat production, which in turn allows improved acoustics because fans do not need to spin as quickly."
See? The Xeon 90nm and Prescott's EIST just changes clock speed, while Pentium M turns off logic too, plus unlike traditional processors that goes idle when necessary, Pentium M is always idle and goes active when necessary.
KristopherKubicki - Thursday, September 2, 2004 - link
Anemone: The bus is quadpumped, so its really 266 * 14 and 266 * 13.Kristopher
KristopherKubicki - Thursday, September 2, 2004 - link
Typo on the table but that is all fixed.The 3.46 is 2MB L3 cache, not L2.
P4EEs do price drop, but people usually just discontinue them. I think there were only like 55K P4EE 3.4s made, or some ridiculously low number like that.
Kristopher
IntelUser2000 - Thursday, September 2, 2004 - link
3.46XE is based on 0.13 micron Gallatin core with 2MB L3 cache.3.73XE is based on Prescott with 0.09 micron and 2MB L2 cache.
They are both 1066MHz bus.
Anemone - Thursday, September 2, 2004 - link
I thought the math worked out to 3.46 and 3.73 being 3.25 and 3.5 times 1066.64 of the bus. And most other places are assuming the 3.46 is going to be a 2mb cache chip - did you mistype or do you differ pointedly from that rumormill?Thank you :)
slay9 - Wednesday, September 1, 2004 - link
I'm a bit confused. The 6 series processors are suppose to have 2MB L2 cache, correct? They're listed with a 1MB cache on the table. But regardless, without a 1066FSB, they're not very interesting CPUs...And the first two lines... The Pentium 4 XE 3.73Ghz is listed twice, with two different clock speeds and two different caches. Hmm.
JarredWalton - Wednesday, September 1, 2004 - link
Basically, the only difference between the 6xx series P4 chips and the upcoming P4PXE chips will be the 1066 FSB on the P4PXE - is that right? Then again, cost of the high-end P4P 670 is right up there is the P4PXE, isn't it? Reminds me of the 3800+ and the FX-53....Do the prices on P4PXE chips ever drop (officially), or are they simply discontinues a la the FX chips? With them being "direct competitors", I'm assuming they're just discontinued (and sold as Xeons).