Intel once looked at x86, the architecture that made it rich, and decided:

“This peasant stack has too much baggage. We shall replace it with a palace.”

The palace was IA-64.

The processor family was Itanium.

The architectural philosophy was EPIC, Explicitly Parallel Instruction Computing.

The strategic assumption was:

“The compiler will save us.”

This is where the train left the rails, entered the airspace, and filed a flight plan.

I. The Official Dream

In 1994, Intel and Hewlett-Packard publicly joined forces around a future 64-bit architecture. HP had PA-RISC customers and enterprise ambitions. Intel had x86 money and a desire to escape the architecture it had already trained the world to depend on.

The promise was seductive:

• clean 64-bit architecture
• no ugly x86 legacy
• explicit instruction-level parallelism
• high-end servers and workstations
• a future beyond RISC and CISC trench warfare
• compilers smart enough to expose parallelism before runtime

The future had a name:

IA-64.

Not x86-64. Not AMD64. Not “take the existing apartment block and add more floors.”

IA-64 was a different city.

Architecture	Political model
x86	ancient bureaucracy that somehow collects taxes
AMD64	same bureaucracy, expanded to 64-bit, backward-compatible
IA-64	new capital city built in the desert by consultants
RISC	disciplined ministries with fewer historical crimes

Intel wanted IA-64 to become the future of high-end computing.

The market heard:

“Please rewrite your life.”

The market did not salute.

II. EPIC: Explicitly Parallel Instruction Computing

Traditional out-of-order processors do enormous work at runtime.

They inspect instruction dependencies, reorder operations, issue independent work in parallel, recover from speculation, and generally act like a tiny authoritarian scheduler inside the chip.

IA-64 tried to move much of that burden to the compiler.

The compiler would examine the program and tell the processor which instructions could safely run in parallel.

This is the EPIC idea.

In simplified form:

ordinary CPU attitude:
  "Give me instructions. I will discover parallelism at runtime."

IA-64 attitude:
  "Compiler, discover the parallelism before execution and label it clearly."

IA-64 instructions were grouped into bundles. The encoding carried information about what could execute together and where dependencies required separation.

The dream was elegant:

compiler sees:
  load A
  load B
  add C
  branch maybe

compiler emits:
  bundle 0: load A | load B | independent op
  bundle 1: add C  | predicated op | speculative op

The chip would not need to guess as much. The software would arrive pre-organized.

The Supreme Leader respects the ambition.

The Supreme Leader also knows that asking compilers to predict the future is how empires get surprise invoices.

III. The Furniture Problem

Here is the suppressed origin story.

IA-64 was initially named IKEA-64.

The processor shipped in pieces, and the compiler was expected to assemble the furniture.

HP objected because the documentation was still too clear.

Intel objected because the missing screws were called “legacy software.”

So the name became IA-64, which sounded more official and hid the central problem:

the architecture depended on everything arriving in the box, correctly labeled, with a compiler holding the hex key.

IKEA-64 assembly note, suppressed:

1. Identify all parallel operations.
2. Schedule them before runtime.
3. Insert predication and speculation where helpful.
4. Hope memory latency does not laugh.
5. Boot enterprise workload.
6. If performance disappoints, blame compiler.

The instruction set was not stupid.

That would be too easy.

It was worse:

it was ambitious in a way that moved pain from hardware into the toolchain, software ecosystem, and migration plan.

IV. Merced: The Future Arrives Late

The first Itanium, code-named Merced, arrived in 2001.

By then, the future had already become impatient.

The industry had been hearing about IA-64 for years. Customers had real workloads, real binaries, real operating systems, real databases, and real fear of replacing stable misery with expensive experimental misery.

Merced had a problem:

It could run IA-64 code.

The world had x86 code.

Yes, there was an x86 compatibility story.

No, it was not the kind that made customers relax.

Requirement	Customer wanted	Itanium offered
Run existing x86 software	fast enough to preserve investment	compatibility with disappointing performance
Move to 64-bit	minimal disruption	new ISA, new toolchain assumptions
Enterprise confidence	boring migration	expensive bet
Compiler maturity	already solved	”soon, comrade”

This was the Itanium paradox:

the cleaner the architecture looked on paper, the dirtier the migration looked in production.

V. Itanium 2: Better, But The Coup Had Failed

Intel announced the Itanium 2 brand in April 2002, with McKinley as the second generation. Itanium 2 improved performance substantially over the first Itanium.

This mattered technically.

It mattered less strategically.

The throne was already unstable.

In 2003, AMD shipped Opteron and brought AMD64 into the server world. Unlike IA-64, AMD64 extended x86 to 64 bits while preserving practical backward compatibility.

This was the year of righteous forks.

AMD forked Intel’s future. Matthew Dillon forked FreeBSD.

One fork became the 64-bit architecture every PC uses. The other became DragonFlyBSD, which today supports only AMD64/x86_64.

This is the historical joke Intel cannot escape:

even the BSD fork from 2003 lives on the architecture family that killed IA-64.

Both acts were filed under:

COMMITTEE DISAGREEMENT RESOLVED BY WORKING CODE

The pitch was devastatingly simple:

IA-64:
  "Move to our clean future. Port your software. Trust the compiler."

AMD64:
  "Keep running your software. Also, here are 64-bit registers."

Intel built a palace.

AMD added rooms to the existing apartment block and collected rent.

This is why the AMD post matters. AMD did not defeat Itanium with purity. AMD defeated Itanium with compatibility.

Compatibility is not elegant.

Compatibility wins elections.

VI. The Compiler Was Not Magic

The IA-64 bet was not simply “compilers good.”

It was more specific:

compilers would become good enough at static scheduling, predication, speculation, and exposing instruction-level parallelism that hardware could rely on them to keep wide execution resources busy.

This is brutally hard.

Compilers face:

• unpredictable memory latency
• pointer-heavy code
• branch behavior dependent on data
• cache misses
• aliasing
• real workloads that do not look like benchmark hymns
• legacy code not written for the new religion

The compiler can know many things.

It cannot know everything that runtime will reveal.

Out-of-order x86 chips looked ugly, but they adapted dynamically.

IA-64 looked principled, but it often needed the compiler to have supernatural timing discipline.

Design instinct	Strength	Cost
Dynamic scheduling in hardware	adapts at runtime	complex silicon
Static scheduling by compiler	simpler execution model in theory	hard toolchain burden
Predication	reduces some branches	can execute useless work
Speculation	hides latency when correct	recovery and prediction complexity moves around
Large register files	gives compiler room	adds pressure to calling conventions and tooling

The Republic’s conclusion:

If the architecture requires the compiler to be a prophet, verify that the compiler has performed miracles before selling the cathedral.

VII. HP Life Support And Oracle’s Invoice

Itanium did not vanish immediately.

Enterprise platforms can live for a long time after the consumer market forgets they exist.

HP, later HPE, kept Itanium alive for mission-critical systems. HP-UX, OpenVMS, and NonStop customers do not migrate because a blogger calls something dead. They migrate when budgets, support contracts, risk committees, and pain align.

This produced one of the strangest afterlives in architecture history.

Oracle announced in 2011 that it would stop developing software for Itanium. HP sued. In 2016, a jury awarded HPE about $3 billion in damages after finding Oracle breached its obligation to support Itanium systems.

The architecture that failed to replace x86 still generated a multibillion-dollar legal crater.

This is enterprise computing:

when the CPU cannot win the market, it can still become litigation infrastructure.

VIII. The Long Funeral

The final Itanium generation, Kittson, arrived as the 9700 series in 2017.

It was the last new Itanium family.

Intel later wound down the product line, with final shipments ending in July 2021.

Linux eventually removed IA-64 support in the 6.7 kernel cycle.

The funeral was not sudden.

It was a twenty-year state ceremony with procurement forms.

Year	Event
1994	Intel and HP publicly align on IA-64 future
2001	first Itanium, Merced, reaches market
2002	Itanium 2 / McKinley generation begins
2003	AMD Opteron brings AMD64 to servers
2011	Oracle announces end of Itanium software development
2016	HPE wins multibillion-dollar damages against Oracle
2017	final Itanium 9700 / Kittson generation ships
2021	final Itanium shipments end
2023-2024	IA-64 support removed from Linux 6.7

The timeline reads like a monarchy refusing to abdicate after the republic has already opened a DMV.

IX. Why IA-64 Failed

IA-64 did not fail because one thing went wrong.

It failed because many hard things all had to go right at the same time.

The architecture needed:

• compilers to become excellent quickly
• operating systems to support a new ISA
• application vendors to port
• enterprises to accept migration pain
• x86 compatibility to be good enough
• Intel to execute on time
• HP to carry the server ecosystem
• customers to believe the old world was ending
• AMD not to offer a simpler path

AMD offered a simpler path.

That was enough.

The humiliating part for Intel was not merely that IA-64 lost.

The humiliating part was that Intel had to adopt the idea it did not want:

x86 extended to 64 bits.

Intel tried to escape x86.

x86 followed Intel home.

X. The ME Conspiracy Footnote

In the MINIX post, the Republic noted the forbidden joke:

Itanium was too strange for the later x86 platform management empire.

Do not overread this.

IA-64 did not die because Intel Management Engine could not fit into its soul. It died because software compatibility, toolchain burden, late delivery, weak early performance, and AMD64’s pragmatism defeated it.

But the satire remains useful:

IA-64 was the clean room.

Modern x86 became the room with a smaller locked room underneath it.

We will discuss Intel ME and AMD PSP in their own decrees. Each hidden ministry deserves its own indictment.

XI. The Real Story (Suppressed)

Officially, IA-64 meant Intel Architecture 64.

Unofficially, according to surviving IKEA-64 assembly papers, it meant:

Instruction Architecture, 64 Missing Screws.

The first internal manual contained a warning:

Before boot:
  ensure compiler is sufficiently prophetic
  ensure customer has abandoned old binaries
  ensure memory latency has agreed to schedule
  ensure AMD has not discovered pragmatism

The manual was withdrawn after one engineer asked:

“What happens if customers keep their old software and AMD gives them 64-bit x86?”

That engineer was transferred to printer driver certification.

XII. The Lesson

IA-64 is not a lesson against ambition.

Ambition is necessary.

IA-64 is a lesson against architecture that requires the entire world to become correct at the same time.

The compiler had to mature. The ecosystem had to port. The customers had to migrate. The old software had to become less important. The hardware had to arrive on time. The performance had to justify the pain. The competitor had to not offer a boring path that worked.

That last condition failed.

Engineering history is full of beautiful architectures defeated by ugly compatibility.

The decree is simple:

If your future requires everyone to cross a desert, expect someone else to build an extension onto the old apartment block.

And if the processor ships like IKEA furniture, make sure the compiler really can find the missing screws.

— Kim Jong Rails, Supreme Leader of the Republic of Derails