Hardware FixRecommendedDevice not working? Your driver may be the problemCheck updates for common hardware issues.Fix DriversOctober DealsAmazon USOctober deal check: compare before you payAmazon US: current deals, useful picks and tech finds.Check DealsWindows FixRecommendedWindows errors stealing your time? Find the fix fastScan stability, cleanup and performance issues.Fix Now×
Skip to content
Santa Clara desk2 min

What Was the First CPU Chip? The Intel 4004, Explained

The Intel 4004, announced in 1971, is recognized as the first complete single-chip CPU and first commercially available microprocessor—but earlier processor systems used multiple chips.
Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

The Intel 4004 is generally considered the first complete CPU built on a single chip and the first commercially available microprocessor. Intel announced it as a stand-alone product on November 15, 1971. That answer depends on what “first CPU chip” means: earlier systems had processor functions implemented across multiple chips.

What does “first CPU chip” mean?

The phrase can refer to different milestones: the first processor design, the first working processor system, or the first complete CPU integrated onto one silicon chip. For the last meaning—and for the first commercially available microprocessor—the best-supported answer is Intel’s 4004. The Smithsonian National Museum of American History describes it as the first complete CPU on one chip and dates its release to November 15, 1971 (Smithsonian collection record).

This does not mean the 4004 was the first processor of any kind, the first electronic computer, or a complete computer on a chip. Processor functions had been implemented before with multi-chip designs. The Computer History Museum, for example, identifies the Garrett AiResearch MP944 as a six-chip set designed for the F-14A Central Air Data Computer (Computer History Museum).

Why was the Intel 4004 created?

In 1969, Japanese calculator maker Busicom, also known as Nippon Calculating Machine Corporation, commissioned Intel to develop custom chips for its 141-PF printing calculator. The original proposal called for 12 custom chips. Intel redesigned the plan as a four-chip set, with the 4004 serving as the programmable CPU (Intel’s 4004 timeline).

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
#1 Best Overall
Sale
Intel Core i5-14400F Desktop Processor 10 cores (6 P-cores + 4 E-cores) up to 4.7 GHz
  • 10 cores (6 P-cores plus 4 E-cores) and 16 threads
  • Performance hybrid architecture integrates two core microarchitectures, prioritizing and distributing workloads to optimize performance
  • Up to 4.7 GHz unlocked. 20MB Cache
  • Compatible with Intel 600-series (with potential BIOS update) and 700-series chipset-based motherboards
  • PCIe 5.0 and 4.0 support. DDR4 and DDR5 Memory support. RM1 thermal solution included. Discrete graphics required.

The 4004 could be programmed to perform the calculator’s operations, while the other chips in the set provided supporting functions. Intel’s account notes that the chips could also be used for operations in other devices (Intel’s 4004 timeline). The CPU itself was one component of a system—not the calculator, nor a complete computer by itself.

Key facts about the 4004

Fact Detail
Chip Intel 4004
Commercial announcement November 15, 1971; Intel’s timeline identifies this as the announcement of the 4004 as a stand-alone product (Intel).
Role Programmable CPU in a four-chip set developed for Busicom’s 141-PF printing calculator (Intel).
Processor width 4-bit, according to Intel (Intel).
Transistor count 2,300, according to the Smithsonian National Museum of American History’s collection record (Smithsonian).

The project’s contributors included Intel engineers Marcian E. “Ted” Hoff, Federico Faggin, and Stan Mazor, as well as Busicom engineer Masatoshi Shima. Intel credits Hoff with the architectural concept and Faggin with leading later design work (Intel project history).

Rank #2
INTEL CPU Core i5-12400F / 6/12 / 2.5GHz / 6xxChipset / BX8071512400F
  • Intel Core i5-12400F Desktop Processor 6 (6P plus0E) Cores Up to 4.4 GHz Turbo Frequency LGA1700 600 Series Chipset 65W Processor Base Power
  • Item Package Dimension: 4.92L x 4.33W x 3.18H inches
  • Item Package Weight - 0.99 Pounds
  • Item Package Quantity - 1
  • Product Type - COMPUTER PROCESSOR
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Support on Ko-Fi

Was the 4004 the first microprocessor?

It is accurate to call the 4004 the first commercially available microprocessor and the first complete CPU integrated on one chip, as Intel and the Smithsonian do (Intel Newsroom; Smithsonian). It is less accurate to say it was simply “the first processor,” without defining the term, because earlier multi-chip systems performed processor functions.

The distinction is integration: the 4004 put a complete CPU on one chip, even though it operated as part of a four-chip calculator system. A CPU or microprocessor is not automatically a complete computer; a complete system also needs supporting components and connections.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

Quick Recap

SaleBestseller No. 1
Intel Core i5-14400F Desktop Processor 10 cores (6 P-cores + 4 E-cores) up to 4.7 GHz
Intel Core i5-14400F Desktop Processor 10 cores (6 P-cores + 4 E-cores) up to 4.7 GHz
10 cores (6 P-cores plus 4 E-cores) and 16 threads; Up to 4.7 GHz unlocked. 20MB Cache
$161.08
Bestseller No. 2
INTEL CPU Core i5-12400F / 6/12 / 2.5GHz / 6xxChipset / BX8071512400F
INTEL CPU Core i5-12400F / 6/12 / 2.5GHz / 6xxChipset / BX8071512400F
Item Package Dimension: 4.92L x 4.33W x 3.18H inches; Item Package Weight - 0.99 Pounds; Item Package Quantity - 1
Bestseller No. 3
Intel Core i5-12400 Desktop Processor 18M Cache, up to 4.40 GHz
Intel Core i5-12400 Desktop Processor 18M Cache, up to 4.40 GHz
The processor features Socket LGA-1700 socket for installation on the PCB
$185.39
Bestseller No. 4
Intel® Core™ i5-14400 Desktop Processor 10 cores (6 P-cores + 4 E-cores) 4.7 GHz
Intel® Core™ i5-14400 Desktop Processor 10 cores (6 P-cores + 4 E-cores) 4.7 GHz
Up to 4.7 GHz unlocked. 20MB Cache; PCIe 5.0 and 4.0 support. Intel Optane Memory support. RM1 thermal solution included.
$208.93
Bestseller No. 5
Intel Core i5-12600KF Desktop Processor 10 (6P+4E) Cores up to 4.9 GHz Unlocked LGA1700 600 Series Chipset 125W
Intel Core i5-12600KF Desktop Processor 10 (6P+4E) Cores up to 4.9 GHz Unlocked LGA1700 600 Series Chipset 125W
Discrete graphics required; Compatible with Intel 600 series and 700 series chipset-based motherboards
$199.95
Best Value
Intel Core i5-12600KF Desktop Processor 10 (6P+4E) Cores up to 4.9 GHz Unlocked LGA1700 600 Series Chipset 125W
  • Game and multitask without compromise powered by Intel’s performance hybrid architecture on an unlocked processor.
  • Discrete graphics required
  • Compatible with Intel 600 series and 700 series chipset-based motherboards
  • Intel and reg; Core and reg; i5 processor offers hyper-threading architecture that delivers high performance for demanding applications with improved onboard graphics and turbo boost
  • The processor features Socket LGA-1700 socket for installation on the PCB
Rank #4
Intel® Core™ i5-14400 Desktop Processor 10 cores (6 P-cores + 4 E-cores) 4.7 GHz
  • 10 cores (6 P-cores plus 4 E-cores) and 16 threads. Integrated Intel UHD Graphics 730 included.
  • Performance hybrid architecture integrates two core microarchitectures, prioritizing and distributing workloads to optimize performance
  • Up to 4.7 GHz unlocked. 20MB Cache
  • Compatible with Intel 600-series (with potential BIOS update) and 700-series chipset-based motherboards
  • PCIe 5.0 and 4.0 support. Intel Optane Memory support. RM1 thermal solution included.
Rank #3
Intel Core i5-12400 Desktop Processor 18M Cache, up to 4.40 GHz
  • Intel Core i5 2.50 GHz processor offers hyper-threading architecture that delivers high performance for demanding applications with improved onboard graphics and turbo boost
  • The processor features Socket LGA-1700 socket for installation on the PCB
  • Its 18 MB of L3 cache is good enough to carry routine data and process them in a flash giving you fast and smooth performance
  • Built-in Intel UHD Graphics 730 controller for improved graphics and visual quality. Supports up to 4 monitors.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

Leave a Reply

Your email address will not be published. Required fields are marked *

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

More from the Wire

  1. World desk4 min
    How to Spot an AI Voice Scam Before Sending MoneyDon’t rely on how a caller sounds. Pause, call back through a known number, and verify the emergency with another trusted person before sending money.
  2. Mountain View desk4 min
    Google’s SynthID Detector: How to Check AI-Generated Images, Video and AudioGoogle’s SynthID Detector looks for an embedded watermark in supported images, video and audio. Here is what its results do—and do not—show.
  3. Redmond desk20 min
    How to create a link to File or Folder in Windows 11Windows 11 gives you several ways to point to a file or folder without moving or duplicating it. You can create a desktop shortcut,…
Recommended PC Tool
Recommended PC Tool
Outdated Drivers Are Slowing You DownFree scan - exact matches
Windows Errors? Fix Them Before They SpreadFree repair scan

Two free Windows tools

One Free Minute Could Fix That PC

Before you go - each of these free tools takes about a minute and tackles what quietly slows a Windows PC down.

Special offer. View Outbyte info, uninstall instructions, EULA, and Privacy Policy.