All objects with Northwood chip

Successor of the 'Willamette', and a fine one! Northwood had several improvements including bigger L2 cache (512KB), 130nm manufacturing process which made the CPU run cooler and reach higher clock frequencies.

Image At last but not least it came with Hyper Threading on the 3.06GHz version. Hyper Threading might have been in development during the Willamette (but not activated), but I'm not sure about this. Nevertheless Hyper Threading added an extra 'core' in the operating system to increase performance. It was by far not equally as fast a real core but it can give extra performance in some situations.

The 'Northwood'-core is also used in the Celeron, but is cut down on L2-cache which causes a performance hit.

I wrote a timeline to get an insight of what was going on at the time when first rumors of Northwood were available until the release of Northwood:

Northwood timeline

29 April 1999
Rumours about future Intel IA-64 chip (successor to Merced) that will run at 3000MHz. The chip is bound to be released in about 4 to 5 years.

10 September 1999
Rumours about 3GHz haven't changed. Willamette (first Pentium 4) and Foster (first Xeon) will be based on the P6 core and was planned for Q4 2000 but might be delayed to

early 2001. In 2002 it will be made with an 0.13nm manufacturing process rather than 0.18nm.

6 February 2000
Northwood will be the 0.13nm mobile version of Willamette.

11 March 2000
VR-Zone has new information: Willamette will release at 1.3GHz and 1.4GHz in Q4 2000. In Q4 2001 Intel will release
Northwood at 2GHz.

11 August 2000
C|Net says that Northwood will be released in Q3 2001 and will be an improved version of Willamette. It will support RDRAM, SDR-SDRAM and DDR-SDRAM and will run at 2GHz.

Oktober 2000
Socket 423 will be used for Willamette and Socket 478 will be introduced with the release of Northwood.

4 ~ 10 September 2000
My Pentium 4 1.5GHz Willamette Engineering Sample.

20 November 2000
Intel released 1400MHz and 1500MHz Pentium 4 Willamette.

1 January 2001
The 1.3 Pentium 4 (Willamette) will be released in January 2001 for $410 which is twice as expensive as an Athlon 1.2GHz Thunderbird.

9 February 2001
Northwood will be released in Q3 2001.

27 Februari 2001
Pentium 4 announced at IDF (Intel Developer Forum)

18 April 2001
The Register writes that 0.13nm chips won't be released in 2001.

28 April 2001
Rumours that 0.13nm chip will be delayed because not all factories are finished on time.

25 May 2001
Intel announced that the Pentium 4 2.0 Willamette at 0.18nm wil be released in Q3 2001.

28 May ~ 3 June 2001
My Pentium 4 1.5GHz Northwood Engineering sample.

4 June 2001
Photo's of the new socket 478 Pentium 4 engineering samples pop up. On Computex Intel shows the new i845 Brookdale chipset for the Pentium 4 at S478.

6 June 2001
First samples of the 0.13nm Pentium 4's go out to motherboard manufacturers. The 0.13nm chip will have improvement, 512KB L2, higher clock frequencies and lower

production costs.

Benchmarks are released; a Pentium 4 1.5GHz scores 427 points with 3DMark2000 CPU test and the new AMD Palomino at 1GHz scores 578 points. Both systems ran with CAS3

PC133 SDR-SDRAM.

7 June 2001
The Inquirer announces that the 0.13nm Northwood at 2GHz and 2.2GHz will be released in Q4 2001.

27 August 2001
Release of the 1.9GHz and 2.0GHz Pentium 4 Willamette CPU's.

29 August 2001
Intel shows a 3.5GHz Pentium 4 Northwood on the Intel Developer Forum. On 3GHz Intel showed an demo with 100% CPU usage (Quake 3, movies and file copies).

11 October 2001
It's difficult to buy S478 Pentium 4's. Chipsets and sockets aren't much available.

12 October 2001
Release of the Northwood delayed to Q1 2002.

16 October 2001
Review of the Athlon XP 1800+ which costs one-third of a Pentium 4.

22 October 2001
Benchmarks pop up and an 1.8GHz Northwood sample is being overclocked to 2.26GHz.

5 November 2001
Introduction of Athlon XP 1900+
My Pentium 4 2.0 Northwood Engineering sample.

14 December 2001
Distributors put 2.2GHz Pentium 4 Northwood on their list. Pre-orders are possible.

18 December 2001
The Pentium 4 Northwood at 2GHz and 2.2GHz will be released on 7 January 2002.
Reviews pop up on Hardware.fr. The Athlon XP 1800+ can get close to the 2.2GHz Northwood. Running a Willamette, Northwood and Palomino on 1.5GHz clearly shows that the

Athlon XP has the best clock-for-clock performance.

24 December 2001
Pentium 4 2GHz Northwood available in Japan.

30 December 2001
Pentium 4 2.2GHz and Athlon XP 2000+ also spotted in Japan.

2 January 2002
Pentium 4 2.2 overclocked to 3GHz using 1.9V.

7 January 2002
Official release of the Northwood.

Vendor
Name
Trans.
vCore
ES?
Date
Socket
sSpec
Intel
55M
1,42V
Yes
0122
S478
Unknown
Intel
55M
1,3V
No
0304
mPGA479M
SL6J2
Intel
55M
1,5V
No
0150
S478
SL668
Intel
55M
1,5V
No
0148
S478
SL63X
Intel
55M
1,5V
No
0312
mPGA479M
SL6FH
Intel
55M
1,5V
No
0240
S478
SL68Q
Intel
55M
1,5V
Yes
0145
S478
QLE4ES
Intel
55M
1,5V
No
0220
S478
SL5YR
Intel
55M
1,5V
No
0227
S478
SL66R
Intel
55M
1,525V
No
0234
S478
SL6GQ
Intel
55M
1,525V
No
0326
S478
SL6SW
Intel
55M
1,525V
No
0349
S478
SL6VY
Intel
55M
1,5V
No
0432
S478
SL6PK
Intel
55M
~1,5V
No
0341
S478
SL6VT
Intel
55M
1,5V
No
0408
mPGA479M
SL6VB
Intel
55M
1,5V
Yes
0138
S478
QHL5ES
Intel
55M
1,5V
Yes
0151
S478
SL5ZU
Intel
55M
1,5V
No
0331
mPGA479M
SL789
Intel
55M
1,53V
No
0312
S478
SL6RZ
Intel
55M
~1,5V
No
0349
S478
SL6W4
Intel
55M
1,5V
No
0313
S478
SL6SH
Intel
55M
1,525V
No
0241
S478
SL6EF
Intel
55M
1,525V
No
0323
S478
SL6Q8
Intel
55M
1,5V
No
0333
mPGA479M
Q223
Intel
55M
~1,5V
No
0416
S478
SL6W4
Intel
55M
~1,5V
No
0428
S478
SL6VU
Intel
55M
1,5V
No
0336
S478
SL6ZY
Intel
55M
1,4V
No
0245
S478
SL6DW
Intel
55M
1,525V
No
0247
S478
SL6EG
Intel
55M
1,525V
Yes
0206
S478
QLB2ES
Intel
55M
1,5V
No
0337
S478
SL6VV
Intel
37,2M
1,525V
No
0333
S478
SL6QB
Intel
37,2M
1,525V
No
0330
S478
SL6WS
Intel
37,2M
1,525V
Yes
0305
S478
QWK0ES
Intel
37,2M
1,525V
No
0324
S478
SL6S3
Intel
37,2M
1,525V
No
0344
S478
SL6PE
Intel
55M
1,525V
Yes
0226
S478
QNE2
Intel
55M
1,5V
No
0332
S478
SL77S
Intel
55M
1,5V
No
0323
S478
SL77S
Intel
37,2M
1,525V
No
0352
S478
SL6QB
Intel
37,2M
1,525V
No
0422
S478
SL6WJ
Intel
37,2M
1,525V
No
0414
PGA463
SL7EY
Intel
55M
1,525V
No
0401
S478
SL6WK
Intel
55M
1,525V
No
0344
S478
SL78Z
Intel
37,2M
1,525V
No
0309
S478
SL6S5
Intel
55M
1,5V
No
0310
S478
SL726
Intel
37,2M
1,525V
No
0252
S478
SL6S5
Intel
55M
1,5V
No
0347
S478
SL77P