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Intel LGA775 Pentium 4 & 925X/915 Review

Intel has made a major push into shaping the PC landscape into something that would fit into a greater picture; Digital Home/Office Concept. Major change is done to the CPU package to shift the design from mPGA478 to LGA775 and the new chipsets features DDR2 SDRAM, PCI Express, High Definition Audio, GMA 900, Matrix RAID and Wireless Connect.


Intel has made a major push into shaping the PC landscape into
something that would fit into a greater picture; Digital Home/Office Concept. There are
two core components that Intel has made prominent changes to; Processors and
more significantly Chipsets. On the processors front, the major change is done
to the CPU package to shift the design from mPGA478 to LGA775 to improve
electrical characteristics of the connection to the motherboard and allow higher
CPU frequency. Intel has placed a lot more emphasis on chipsets this time with a
slew of new features such as LGA775 Socket, DDR2 SDRAM, PCI Express I/O
Technology, High Definition Audio (Azalia), Graphics Media Accelerator 900,
Matrix RAID Technology and Wireless Connect Technology (ICH6W) support.

Intel has assigned processor numbers (5xx sequence) into the
newly launched LGA775 Pentium 4 processors supporting HT Technology, built on
90nm process technology with speeds range from 2.8Ghz to top off at 3.60 GHz.
These LGA775 Pentium 4 processors are based on the 90nm Prescott core feature
800Mhz FSB, HT, SSE3 and 1MB L2 cache and the processor model numbers are
Pentium 4 560 (3.6Ghz), 550 (3.4Ghz), 540 (3.2Ghz), 530 (3Ghz) and 520 (2.8Ghz).
Processor numbers may change in the future due to changes in architecture,
cache, clock speed, FSB and future Intel Technologies such as Vanderpool or
EM64T etc. Intel has also launched the LGA775 version of the Extreme Edition
with speed at 3.4Ghz but there is no processor number assign to the Extreme
Edition series.

There are three newly launched chipsets to go along with these
LGA775 processors; 925X Express (Alderwood), 915P Express (Grantsdale P) and
915G Express (Grantsdale G). These chipsets are all PCI Express based and is
paired up with the new ICH6 series Southbridge to offer a whole range of new
features that we will be going through in details later. We will also check out
the performance of the LGA775 Pentium 4 processors together with these chipsets
comparing to the 939-pin Athlon FX-53 and Athlon 64 3800+ on VIA K8T800 Pro,
thermal solutions, new components required for these platforms, installation
procedures and of course the overclockability.


Model Number & Pricing


Packaging Technology Front Side Bus (FSB) On-die Cache Price in 1,000-Unit Quantities
Extreme Edition 3.40 3.40 LGA775 800MHz 512K L2, 2M L3 $ 999
Pentium 4 560 3.60 LGA775 800MHz 1MB L2 $ 637
Pentium 4 550 3.40 LGA775 800MHz 1 MB L2 $ 417
Pentium 4 540 3.20 LGA775 800MHz 1 MB L2 $ 278
Pentium 4 530 3.00 LGA775 800MHz 1 MB L2 $ 218
Pentium 4 520 2.80 LGA775 800MHz 1 MB L2  $ 178
Celeron D 335 2.80 478-pin 533Mhz 256KB $ 117
Celeron D 330 2.66 478-pin 533Mhz 256KB $ 89
Celeron D 325 2.53 478-pin 533Mhz 256KB $ 79
Celeron D 320 2.40 478-pin 533Mhz 256KB $ 69


Express Chipset Price in
1,000-Unit Quantities
Intel® 925X Express Chipset $ 50
Intel® 915G Express Chipset $ 41
Intel® 915P Express Chipset $ 37

The LGA775 processors are priced at the same of the mPGA478
processors therefore it makes sense to get the LGA775 platform if you are
getting a whole new PC. There will be a price cut scheduled on August 22nd where
the Pentium 4 560 will be cut from $ 637 to $ 417, 550 from $ 417 to $ 278, 540 from
$ 278 to $ 218, 530 from $ 218 to $ 178 and 520 from $ 178 to $ 165. Certainly the
LGA775 processors become much more affordable by then and will spur more demand.

Roadmaps Comparison


 Market Segment

Processor Family



Q3 ’04

Q4 ’04




Performance Desktop

Pentium 4 Extreme Edition


(0.13, 2MB L3, LGA775)


(0.13, 2MB L3, 1066Mhz FSB, LGA775)

Mainstream Desktop

Pentium 4

Prescott (D-0)

(90nm, 1MB L2, LGA775)

560 / 550 / 540 / 530 / 520 (3.6
/ 3.4 / 3.2 / 3 / 2.8Ghz)

Prescott (E-0)

(NX Bit Support)

560J / 550J / 540J / 530J / 520J
570J/570 (3.8Ghz)  

Value Desktop

Celeron D
Celeron 256
(90nm, 533Mhz FSB, 256KB L2)
335 / 330 / 325 / 320
2.80 / 2.66 / 2.53 / 2.40 GHz)
Celeron 256
(NX Bit Support)
340J / 340 (2.93Ghz)
335J / 330J / 325J / 320J
345J / 345 (3.06Ghz) 350J / 350 (3.2Ghz)


Performance Desktop

Athlon FX

SledgeHammer (CG)
(0.13, SOI, 1MB L2)
FX-53 (2.4Ghz)
San Diego (D-0)
(90nm, SOI, 1MB L2)
FX-55 (2.6Ghz)

Mainstream Desktop

Athlon 64

Newcastle (CG)
(0.13, SOI, 512KB L2)
3500+ (2.2Ghz)
3800+ (2.4Ghz)
Winchester (D-0)
(90nm, SOI, 512KB L2)

3000+ / 3200+ / 3500+ / 3800+ / 4000+

(1.8 / 2 / 2.2 / 2.4 / 2.6Ghz)

Value Desktop



(0.13, 256KB L2)
(1.67 / 1.75 / 1.83 / 2.0Ghz)

(0.13, SOI, 256KB L2)
3100+ (1.8Ghz)

3200+ (939)
3500+ (939)
3400+ (754)

It is always interesting to compare roadmaps of Intel and AMD to check out
their upcoming processors lineup. Intel is going to add in NX Bit support to the
current batch of LGA775 processors with a "J" nomenclature at the end of the
processor model number by this quarter. AMD is planning an attack on the value
segment by launching a new Sempron value family during August based on "K7"
Barton core and "K8" Paris core. The Sempron processor based on Paris core is
actually a 32-bit version of ClawHammer with strip-down L2 cache of 256KB. A
faster Celeron D 340J/340 (2.93Ghz) will come along to stop the Sempron 3100+
(1.8Ghz). By end of the year, AMD will be mass producing San Diego and
Winchester processors based on 90nm process technology with speed up to 2.6Ghz.
Intel will have their 1066Mhz 3.46 Extreme Edition ready for the performance
battle against the FX-55 (2.6Ghz) and the Prescott will reach 3.8Ghz to fend off
against the 4000+ (2.6Ghz) based on Winchester core. It is not clear if the
faster 1066Mhz bus will be extend to the Prescott family but hopefully it will
be since it is much needed.

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