PA-RISC information - since 1999

HP i2000 Itanium workstation

Quick Facts
Introduced 2001
Period Decline (IV)
Series Itanium
CPU 1-2 Itanium 1
733-800 MHz
Caches 32 KB L1
96 KB L2
2-4.0 MB L3
Design 82460GX
Drives 6-8 drives
Expansion 5 PCI 64/66
2 PCI 64/33
1 AGP Pro 110
Bandwidth CPU ?
Mem 4.2 GB/s
I/O ?
I/O 10/100E
2 PS/2

HP i2000 was HP’s first Itanium workstation with first generation Merced Itanium processor, released in 2001 as proof-of-concept to deliver first Itanium based on an early Intel 82460GX reference design (rebranded and sold by other vendors). Itanium had been long in development as joint HP-Intel project that promised a better CPU future with VLIW/EPIC architecture on HP-UX, Windows and Linux.

HP i2000
© Hewlett Packard 2001

The HP i2000 workstation was the first Itanium computer to actually leave the gates of HP, released in parallel to the last PA-RISC workstations, C3650 and C3750. At the time Unix and RISC workstations were on their way out in the industry due to price and competition from off-the-shelf computers.

As HP put it in 2001, When HP invited Intel into our lab, we showed them the architecture that will become the pervasive 64-bit architecture of the 21st century. They shared our vision and together we invented the Itanium processor family specification. HP i2000 was the first, unhappy materialization of that vision.

The i2000 had certain limitations due to chipset and/or operating system bugs and supported only first generation Itanium CPUs. It was rather slow for the time when contemporary PA-RISC workstations in most cases were significantly faster except in specialized FPU-heavy workloads.

Model Introduced Price
i2000 2001 $7,995-14,495

System architecture


Itanium CPUs always had complex cache arrangements.
CPU Speed L1 Cache L2 Cache L3 Cache
1 Itanium 1 Merced 733 MHz 16/16 KB on-die 96 KB on-die 2.0-4.0 MB off-chip
1-2 Itanium 1 Merced 800 MHz 16/16 KB on-die 96 KB on-die 2.0-4.0 MB off-chip


System buses


Expansion slots


External ports

Operating systems


The HP i2000 with first generation Itanium (Merced) CPU was beaten by most contemporary workstations of the early 2000s in benchmarks other than FP. HP claimed in 2001 that while the i2000 will outperform most, if not all, current architectures in floating point performance in the SPECfp benchmark, however its more real-world relevant Integer performance in applications such as encryption/decryption operations for secure web serving is excellent.

Apparently, SPEC scores for i2000 on Windows XP were in fact higher
Model SPEC2000, int SPEC2000, fp SPEC2000
rate, int
rate, fp
i2000 733 MHz 2 MB 623 7.2
i2000 733 MHz 4 MB 335 577
i2000 800 MHz 2 MB 655
2-CPU: 658
2-CPU: 13.2
i2000 800 MHz 4 MB 365 610

For comparison, the contemporary C3700 workstation had a SPEC2000 int of 604 while the last c8000 PA-RISC workstation had a SPEC2000 int of 1001.


Height Width Depth Weight
457mm 254mm 645mm 38kg


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