List of Intel Itanium processors explained

The Itanium from Intel is a high-end server and supercomputer microprocessor.

Itanium (2001)

Merced (180 nm)

Steppings: C0, C1 and C2. CPUID: 0007000604h (stepping C0), 0007000704h (stepping C1) or 0007000804h (stepping C2). Transistor count: 25.4 million for CPU, 295 million for the external L3 cache. The FSB data bus is 64 bits wide, not 128 like in Itanium 2.

Model	S-Spec number	Clock speed	Cache	FSB speed	Voltage	TDP (W)	Socket	Release date	Price
L2	L3
Itanium 733 MHz 2 MB	SL4LT, SL5VS, SL6RH				266 MT/s	1.25–1.6 V	116		2001-05-29	$1,177
Itanium 733 MHz 4 MB	SL4LS, SL5VT			4 MB			130			$4,227
Itanium 800 MHz 2 MB	SL4LR, SL5VU, SL6RK	800 MHz		2 MB			116			$1,980
Itanium 800 MHz 4 MB	SL4LQ, SL5VW, SL6RL			4 MB			130			$4,227

Itanium 2 (2002-2007)

Itanium 2 uses socket PAC611 with a 128 bit wide FSB. The 90 nm CPUs (9000 and 9100 series) bring dual-core chips and an updated microarchitecture adding multithreading and splitting the L2 cache into a 256 KB data cache and 1 MB instruction cache per core (the pre-9000 series L2 cache being a 256 KB common cache). All Itaniums except some 130 nm models are capable of >2-socket SMP.

McKinley (180 nm)

Stepping: B3. Die size: 421 mm². Transistor count: 221 million. CPUID: 001F000704h

Model	S-Spec number	Clock speed	Cache	FSB speed	Voltage	TDP (W)	Release date	Price
L2	L3
Itanium 2 900 MHz 1.5 MB	SL67W, SL6P6	900 MHz	256 KB	1.5 MB	400 MT/s	1.5 V	90	2002-07-08	$1,338
Itanium 2 1.0 GHz 1.5 MB	SL67U, SL6P5	1000 MHz					100		$2,247
Itanium 2 1.0 GHz 3 MB	SL67V, SL6P7			3 MB					$4,226

Madison (130 nm)

Stepping: B1. Die size: 374 mm². Transistor count: 410 million. CPUID: 001F010504h.
The Madison 9M table contains the 4MB and 6MB successors of the first Madisons.

Model	S-Spec number	Clock speed	Cache	FSB speed		Voltage	TDP (W)	Release date	Price
L2	L3
Itanium 2 1.3 GHz 3 MB	SL6XD	1300 MHz	256 KB	3 MB	400 MT/s		1.3 V	97	2003-06-30	$1,338
Itanium 2 1.4 GHz 4 MB	SL6XE	1400 MHz		4 MB				91		$2,247
Itanium 2 1.5 GHz 6 MB	SL6XF	1500 MHz		6 MB				107		$4,226
Itanium 2 1.4 GHz 1.5 MB	SL76K	1400 MHz		1.5 MB				91	2003-09-08	$1,172
Itanium 2 1.4 GHz 3 MB	SL7FP			3 MB					2004-04-13	$1,172
Itanium 2 1.6 GHz 3 MB	SL7FQ	1600 MHz						99		$2,408

Deerfield

The same chip as Madison, but at a lower voltage.

Madison 9M (130 nm)

Steppings: A1 and A2. Die size: 432 mm². Transistor count: 592 million. CPUID: 001F020104h (stepping A1) or 001F020204h (stepping A2).
9M is the chip of all the third generation Itanium 2s, irrespective of the amount of enabled cache.^{[1] [2]}

Model	S-Spec number	Clock speed	Cache	FSB speed		Voltage	TDP (W)	Release date	Price
L2	L3
Itanium 2 1.5 GHz 4 MB	SL7ED, SL8CX	1500 MHz	256 KB	4 MB	400 MT/s		1.3 V	107	2004-11-08	$910
Itanium 2 1.6 GHz 6 MB	SL7EB, SL8CV	1600 MHz		6 MB				122		$1,980
Itanium 2 1.6 GHz 9 MB	SL87H, SL8CU			9 MB						$4,226
Itanium 2 1.6 GHz 6 MB	SL93X			6 MB	533 MT/s				2006-2?^[3]
Itanium 2 1.6 GHz 9 MB	SL93W			9 MB
Itanium 2 1.66 GHz 6 MB	SL8JK	1666 MHz		6 MB	667 MT/s				2005-07-18	$2194
Itanium 2 1.66 GHz 9 MB	SL8JJ			9 MB						$4,655

Fanwood

The same chip as Madison 9M, but restricted to 2-socket and uniprocessor systems.

Model	S-Spec number	Clock speed	Cache	FSB speed		Voltage	TDP (W)	Release date	Price
L2	L3
Itanium 2 1.3 GHz 3 MB	SL7SD, SL8CY	1300 MHz	256 KB	3 MB	400 MT/s			62	2004-11-08	$530
Itanium 2 1.6 GHz 3 MB	SL7EC, SL8CW	1600 MHz					1.3 V	99		$851
Itanium 2 1.6 GHz 3 MB	SL7EF, SL8CZ				533 MT/s					$1,172

HP mx2 MCM (130 nm)

This multi-chip module codenamed Hondo is not an Intel product, but a separate project of Hewlett-Packard to pack two CPUs onto one PAC611 socket. The S-Spec SL75Z was assigned to the chips that Intel sent to HP for use in mx2.

Montecito (90 nm)

See main article: Montecito (processor). Steppings: C1 and C2. Die size: 596 mm². Transistor count: 1720 million. CPUID: 0020000504h (stepping C1) or 0020000704h (stepping C2).
All processors can support the legacy 400 MT/s FSB.^[7] From Montecito onwards all Itaniums are MP-capable.

Model number	Clock speed	Cache	FSB speed	Multiplier	Cores	Threads per core	Voltage	TDP (W)	Socket	Release date	Price (USD)
L2	L3
Itanium 2 9010		256 KB + 1 MB	6 MB	533 MHz	12×	1	1	1.0875–1.25 V	75 W		2006-07-18	$696
Itanium 2 9015	1.4 GHz		2×6 MB	400 MHz	14×	2	2		104 W			$749
Itanium 2 9020	1.42 GHz		2×6 MB	533 MHz	10.5×							$910
Itanium 2 9030	1.6 GHz		2×4 MB		12×		1					$1552
Itanium 2 9040			2×9 MB				2					$1980
Itanium 2 9050			2×12 MB									$3692

Montvale (90 nm)

The chip is similar to Montecito, but the stepping is A1 and the CPUID is 0020010104h. The models with 533 MT/s FSB also support 400 MT/s FSB operation.^[8] The processors with the Core level Lock-Step error correction feature were released only in 2008.^[9] Even though Intel does not use the "Itanium 2" branding for the 9100-series, it's still grouped with Itanium 2 processors because it uses the same platform and is a minor update on the 9000-series.

Model number	Clock speed	Cache	FSB speed	Multiplier	Cores	Threads per core	Voltage	TDP (W)	Socket	Release date	Price (USD)
L2	L3
Itanium 9110N	1.6 GHz	256 KB + 1 MB	12 MB	533 MHz	12×	1	1	1.0875–1.25 V	75 W		2007-10-31	$696
Itanium 9120N	1.42 GHz		2×6 MB	533 MHz	10.5×	2	2		104 W			$910
Itanium 9130M	1.66 GHz		2×4 MB	667 MHz	10×		1					$1552
Itanium 9140N	1.6 GHz		2×9 MB	533 MHz	12×		2					$1980
Itanium 9140M	1.66 GHz		2×9 MB	667 MHz	10×							$1980
Itanium 9150N	1.6 GHz		2×12 MB	533 MHz	12×							$3692
Itanium 9150M	1.66 GHz		2×12 MB	667 MHz	10×							$3692
Itanium 9152M	1.66 GHz		2×12 MB	667 MHz	10×

Itanium (2007–2019)

These later generations of Itanium use socket LGA 1248, the QuickPath Interconnect and Scalable Memory Interconnect having replaced the Front-Side Bus used by Itanium 2.

Tukwila (65 nm)

See main article: Tukwila (processor). Stepping: E0. Die size: 699 mm². Transistor count: 2046 million. CPUID: 0020020404.
All models support: XD bit (an NX bit implementation), Hyper-threading, Turbo Boost, VT-i2 (Itanium Virtualization technology), Intel VT-d, RAS with Advanced Machine Check Architecture, Cache Safe technology, Enhanced Demand Based Switching, ECC, two memory controllers each with two SMI links to memory buffers for DDR3, for a combined memory bandwidth of 34 GB/s and capacity of 256 GB. The QPI bandwidth is 96 GB/s for cache coherency and 24 GB/s for I/O.

Model number	Clock speed	Cache	QuickPath	Cores	Threads per core	Voltage	TDP (W)	Socket	Release date	Price (USD)
Clock speed	Turbo Boost	L2	L3
Itanium 9310	1.60 GHz		256 KiB + 512 KiB	2×5 MiB	4.8 GT/s	2	2	0.8–1.35 V	130W		2010-02-08	$946
Itanium 9320	1.33 GHz	1.46 GHz		4×4 MiB		4			155W			$1614
Itanium 9330	1.46 GHz	1.60 GHz		4×5 MiB								$2059
Itanium 9340	1.60 GHz	1.73 GHz							185W			$2059
Itanium 9350	1.73 GHz	1.86 GHz		4×6 MiB								$3838

Poulson (32 nm)

Stepping: D0. Die size: 544 mm². Transistor count: 3.1 billion. CPUID: 0021000404.
All models support: Itanium New Instructions,^[10] XD bit (an NX bit implementation), Intel VT-x, Intel VT-d, VT-i3 (Itanium Virtualization technology), Hyper-threading (with Dual-Domain Multithreading), Turbo Boost, Enhanced Intel SpeedStep Technology (EIST), Cache-Safe technology, RAS with Advanced Machine Check Architecture, Instruction Replay technology, ECC, two memory controllers each with two SMI links to memory buffers for DDR3, for a combined memory bandwidth of 45 GB/s and capacity of 512 GB. The QPI bandwidth is 128 GB/s for cache coherency and 32 GB/s for I/O.

Model number	Clock speed	Cache	QuickPath	Cores	Threads per core	Voltage	TDP (W)	Socket	Release date	Price (USD)
Clock Speed	Clock Speed	Turbo-boost	L2	L3
Itanium 9520	1.73 GHz		256 KiB + 512 KiB	20 MiB	6.4 GT/s	4	2	0.85-1.2 V	130W		2012-11-08	$1350
Itanium 9540	2.13 GHz			24 MiB		8			170W			$2650
Itanium 9550	2.4 GHz			32 MiB		4						$3750
Itanium 9560	2.53 GHz					8						$4650

Kittson (32 nm)

The 9700 series, despite nominally having a different stepping (E0 with CPUID 0021000504), is functionally identical with the 9500 series, even having exactly the same bugs, the only difference being the 133 MHz higher frequency of 9760 and 9750 over 9560 and 9550 respectively.^[11] Intel had committed to at least one more generation after Poulson, first mentioning Kittson on 14 June 2007.^[12] Kittson was supposed to be on a 22 nm process and use the same LGA2011 socket and platform as Xeons.^{[13] [14] [15]} On 31 January 2013 Intel issued an update to their plans for Kittson: it would have the same LGA1248 socket and 32 nm process as Poulson, effectively halting any further development of Itanium processors.^[16]

Model number	Clock speed		Cache		QuickPath	Cores	Threads per core	Voltage	TDP (W)	Socket	Release date	Price (USD)
	Clock Speed	Clock Speed	Turbo-boost	L2									L3
Itanium 9720	1.73 GHz		256 KiB + 512 KiB	20 MiB	6.4 GT/s	4	2	0.85-1.2 V	130W		2017-05-11	$1350
Itanium 9740	2.13 GHz			24 MiB		8			170W			$2650
Itanium 9750	2.53 GHz			32 MiB		4						$3750
Itanium 9760	2.66 GHz					8						$4650

See also

• Itanium
• List of Intel microprocessors

Notes and References

1. Web site: Intel® Itanium® 2 Processor Reference Manual for Software Development and Optimization . page 13. Intel . 24 February 2022 . https://web.archive.org/web/20090205013104/http://download.intel.com/design/Itanium2/manuals/25111003.pdf . 5 February 2009 . dead.
2. Web site: Intel® Itanium® 2 Processor Specification Update . pages 9 and 27-28. Intel . 24 February 2022 . https://web.archive.org/web/20060621013136/http://download.intel.com/design/Itanium2/specupdt/25114140.pdf . 21 June 2006 . dead.
3. Web site: Intel® Itanium® 2 Processor Datasheet . page 8. Intel . 24 February 2022 . https://web.archive.org/web/20060621013059/http://download.intel.com/design/Itanium2/datashts/25094505.pdf . 21 June 2006 . dead.
4. Web site: HP rides Hondo to super-sized Itanium servers. Ashlee Vance. Ashlee Vance. 6 May 2004. Theregister.co.uk. 5 January 2019.
5. Web site: machinfo output interpretation on rx4640 . Hewlett Packard Enterprise Community . 30 April 2022.
6. Web site: Haff . Gordon . HP Doubles Up on Madison . "the power envelope of a standard Madison—170 watts in all, 130 watts for the processor and 40 watts for its voltage regulator" . https://web.archive.org/web/20060506094308/http://h71028.www7.hp.com/ERC/downloads/mx2_white_paper.pdf . 6 May 2006 . dead.
7. Web site: Dual-Core Intel® Itanium® 2 Processor 9000 Series . Intel . 24 February 2022 . https://web.archive.org/web/20060822120955/http://download.intel.com/products/processor/itanium2/dc_prod_brief.pdf . 22 August 2006 . dead.
8. Web site: Product Brief Intel® Itanium® Processor 9100 Series . Intel . https://web.archive.org/web/20081207175521/http://download.intel.com/products/processor/itanium/dc_prod_brief.pdf . 7 December 2008 . dead.
9. Web site: Intel Unveils Seven New Intel® Itanium® Processors . Intel . 24 February 2022.
10. Web site: Intel® Itanium® Processor 9500 Series. Intel.com. 5 January 2019.
11. Web site: Intel® Itanium® Processor 9300, 9500 and 9700 Series Specification Update . Intel . https://web.archive.org/web/20201111234308/https://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/9300-9500-9700-series-spec-update.pdf . 11 November 2020 . dead.
12. Web site: Boslet . Mark . Intel to employ advanced technology on server chips . . 15 June 2007 . 26 February 2022.
13. Web site: Wheeler . Bob . Tocking Itanium . . 26 February 2022.
14. Web site: Skaugen . Kirk . IDF2011 Intel Developer Forum . slide 21. Intel . 26 February 2022.
15. Web site: Nist . Pauline . More than just another Itanium chip . Intel . 26 February 2022 . https://web.archive.org/web/20200808053527/https://itpeernetwork.intel.com/more-than-just-another-itanium-chip/#gs.r3sxvd . 8 August 2020 . dead.
16. Web site: Intel® Itanium® Processors Update . https://web.archive.org/web/20161109135111/http://www.intel.com/content/www/us/en/processors/itanium/itanium-kittson-update.html . 9 November 2016 . dead.