List of Intel Xeon processors (P6-based)

Main article: List of Intel Xeon processors

Pentium II Xeon

"Drake" (250 nm)

• Based on P6 microarchitecture
• All models support: MMX
• All models support quad-processor configurations
• Steppings: B0, B1

Model number	Frequency	L2 cache	FSB	Mult.	Voltage	TDP	Socket	Release date	Release price (USD)
Pentium II Xeon 400	400 MHz	512 KB	100 MT/s	4×	2.0 V	30.8 W	Slot 2	June 29, 1998	$1,124[1]
Pentium II Xeon 400	400 MHz	1 MB	100 MT/s	4×	2.0 V	38.1 W	Slot 2	June 29, 1998	$2,836[1]
Pentium II Xeon 450	450 MHz	512 KB	100 MT/s	4.5×	2.0 V	34.5 W	Slot 2	October 6, 1998	$824[2]
Pentium II Xeon 450	450 MHz	1 MB	100 MT/s	4.5×	2.0 V	42.8 W	Slot 2	January 5, 1999	$1,980[3]
Pentium II Xeon 450	450 MHz	2 MB	100 MT/s	4.5×	2.0 V	46.7 W	Slot 2	January 5, 1999	$3,692[3]

Pentium III Xeon

"Tanner" (250 nm)

• Based on P6 microarchitecture
• All models support: MMX, SSE
• All models support quad-processor configurations
• Die size: 123 mm²
• Steppings: B0, C0

Model number	Frequency	L2 cache	FSB	Mult.	Voltage	TDP	Socket	Release date	Release price (USD)
Pentium III Xeon 500	500 MHz	512 KB	100 MT/s	5×	2.0 V	36 W	Slot 2	March 17, 1999	$931[4]
Pentium III Xeon 500	500 MHz	1 MB	100 MT/s	5×	2.0 V	44 W	Slot 2	March 17, 1999	$1,980[4]
Pentium III Xeon 500	500 MHz	2 MB	100 MT/s	5×	2.0 V	36.2 W	Slot 2	March 17, 1999	$3,692[4]
Pentium III Xeon 550	550 MHz	512 KB	100 MT/s	5.5×	2.0 V	34 W	Slot 2	August 23, 1999	$931[5]
Pentium III Xeon 550	550 MHz	1 MB	100 MT/s	5.5×	2.0 V	34 W	Slot 2	August 23, 1999	$1,980[5]
Pentium III Xeon 550	550 MHz	2 MB	100 MT/s	5.5×	2.0 V	34 W	Slot 2	August 23, 1999	$3,692[5]

"Cascades" (180 nm)

• Based on P6 microarchitecture
• All models support: MMX, SSE
• Only 700 MHz and 900 MHz models are capable of quad processor configurations
• All models shipped in either 2.8 V, 5 V, or 12 V variants
• Steppings: A0, A1, A2, B0, C0

Model number	Frequency	L2 cache	FSB	Mult.	Voltage	TDP	Socket	Release date	Release price (USD)
Pentium III Xeon 600	600 MHz	256 KB	133 MT/s	4.5×	2.8–12 V	19.2 W	Slot 2	October 1999	$505[6]
Pentium III Xeon 667	667 MHz	256 KB	133 MT/s	5×	2.8–12 V	21.3 W	Slot 2	October 25, 1999	$655[6]
Pentium III Xeon 700	700 MHz	1 MB	100 MT/s	7×	2.8–12 V	29.6 W	Slot 2	May 22, 2000	$1,177[7]
Pentium III Xeon 700	700 MHz	2 MB	100 MT/s	7×	2.8–12 V	29.6 W	Slot 2	May 22, 2000	$1,980[7]
Pentium III Xeon 733	733 MHz	256 KB	133 MT/s	5.5×	2.8–12 V	23.3 W	Slot 2	October 25, 1999	$826[6]
Pentium III Xeon 800	800 MHz	256 KB	133 MT/s	6×	2.8–12 V	25.4 W	Slot 2	January 12, 2000	$901[8]
Pentium III Xeon 866	867 MHz	256 KB	133 MT/s	6.5×	2.8–12 V	29.6 W	Slot 2	April 10, 2000	$826[9]
Pentium III Xeon 900	900 MHz	2 MB	100 MT/s	9×	2.8–12 V	39.3 W	Slot 2	March 21, 2001[a]	$3,692[13]
Pentium III Xeon 933	933 MHz	256 KB	133 MT/s	7×	2.8–12 V	29.6 W	Slot 2	May 24, 2000	$794[14]
Pentium III Xeon 1.00	1000 MHz	256 KB	133 MT/s	7.5×	2.8–12 V	30.8 W	Slot 2	August 22, 2000	$719[15]

Notes

1. Withdrawn in July due to a bug,^[10] fixed by late August,^[11] shipping again in September.^[12]