Core details	Pentium 4	Pentium 4	Pentium 4	Pentium 4 / Pentium 4 HT	Pentium 4 HT	Pentium 4	Pentium 4	Pentium 4
Development name	Willamette	Northwood	Northwood	Northwood	Northwood	Prescott	Prescott	Prescott
Construction size (nm)	180	130	130	130	130	90	90	90
Transistor count (millions)	42	55	55	55	55	125	125	125
Number of processor cores	1	1	1	1	1	1	1	1
Registers - ALU (bits)	32	32	32	32	32	32	32	32
Registers - FPU (bits)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)
Connection Type	Socket 423 / 478	Socket 478	Socket 478	Socket 478	Socket 478	Socket 478	LGA 775	LGA 775
Model Details
Name / Core speed (GHz)	1.3	1.6 (A)	2.26	3.07	2.4 (C)	2.26 (A)	505 / 2.67	505 (J) / 2.67
	1.4	1.8 (A)	2.40 (B)		2.6 (C)	2.40 (A)	515 / 2.93	515 (J) / 2.93
	1.5	2.0 (A)	2.53		2.8 (C)	2.66 (A)	519 / 3.07	519 (J) / 3.07
	1.6	2.2	2.66		3.0	2.80 (A)
	1.7	2.4	2.80 (B)		3.2	2.80 (A)
	1.8	2.5			3.4
	1.9	2.6
	2.0	2.8
FSB Details
CLK speed (MHz)	100	100	133	133	200	133	133	133
Data transfer rate (MHz)	400	400	533	533	800	533	533	533
Total bus width (bits)	64	64	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	3.20	3.20	4.27	4.27	6.40	4.27	4.27	4.27
Cache details
L1 amount (KiB)	~ 20	~ 20	~ 20	~ 20	~ 20	~ 28	~ 28	~ 28
L1 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L1 trace cache size (KiB)	~ 12	~ 12	~ 12	~ 12	~ 12	~ 12	~ 12	~ 12
L2 data cache size (KiB)	8	8	8	8	8	16	16	16
L2 amount (KiB)	256	512	512	512	512	1024	1024	1024
L2 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	256	256	256	256	256	1024	1024	1024
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	No	No	No	No	No	No	No	No
SSE	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	No	No	No	No	No	No	No	No
3DNow! Professional	No	No	No	No	No	No	No	No
SSE2	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SSE3	No	No	No	No	No	Yes	Yes	Yes
SSSE3	No	No	No	No	No	No	No	No
Additional Features
Intel 64	No	No	No	No	No	No	No	No
AMD64	No	No	No	No	No	No	No	No
HyperThreading	No	No	No	Yes	Yes	No	No	No
NX Bit	No	No	No	No	No	No	No	Yes
Virtualization Technology	No	No	No	No	No	No	No	No

Core details	Pentium 4	Pentium 4 HT	Pentium 4 HT	Pentium 4 HT	Pentium 4 HT	Pentium 4 HT	Pentium 4 HT	Pentium 4 HT
Development name	Prescott	Prescott	Prescott	Prescott	Prescott	Prescott	Prescott	Prescott 2M
Construction size (nm)	90	90	90	90	90	90	90	90
Transistor count (millions)	125	125	125	125	125	125	125	164
Number of processor cores	1	1	1	1	1	1	1	1
Registers - ALU (bits)	32	32	32	32	32	32	32	32
Registers - FPU (bits)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)
Connection Type	LGA 775	Socket 478	LGA 775	LGA 775	LGA 775	LGA 775	LGA 775	LGA 775
Model Details
Name / Core speed (GHz)	506 / 2.67	2.8 (E)	3.2 (F)	520 / 2.8	517 / 2.93	520 (J) / 2.8	521 / 2.8	620 / 2.8
	511 / 2.80	3.0 (E)	3.4 (F)	530 / 3.0	524 / 3.07	530 (J) / 3.0	531 / 3.0	630 / 3.0
	516 / 2.93	3.2 (E)	3.6 (F)	540 / 3.2		540 (J) / 3.2	541 / 3.2	640 / 3.2
	519 (K) / 3.07	3.4 (E)	3.8 (F)	550 / 3.4		550 (J) / 3.4	551 / 3.4	650 / 3.4
				560/ 3.6		560 (J) / 3.6	561 / 3.6	660 / 3.6
						570 (J) / 3.8	571 / 3.8	680 / 3.8
FSB Details
CLK speed (MHz)	133	200	200	200	133	200	200	200
Data transfer rate (MHz)	533	800	800	800	533	800	800	800
Total bus width (bits)	64	64	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	4.27	6.40	6.40	6.40	4.27	6.40	6.40	6.40
Cache details
L1 amount (KiB)	~ 28	~ 28	~ 28	~ 28	~ 28	~ 28	~ 28	~ 28
L1 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L1 trace cache size (KiB)	~ 12	~ 12	~ 12	~ 12	~ 12	~ 12	~ 12	~ 12
L2 data cache size (KiB)	16	16	16	16	16	16	16	16
L2 amount (KiB)	1024	1024	1024	1024	1024	1024	1024	2048
L2 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	256	256	256	256	256	256	256	256
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	No	No	No	No	No	No	No	No
SSE	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	No	No	No	No	No	No	No	No
3DNow! Professional	No	No	No	No	No	No	No	No