Socket 479
CPU socket
Socket 479 is a CPU socket used by some Intel microprocessors normally found in laptops.
There were two versions of Socket 479 made; the first was designed for use with Tualatin-M Celeron and Pentium III mobile processors (also known as mPGA478A), while the second and most common version was used for Celeron M and Pentium M mobile processors (also known as mPGA479M and alternatively as mPGA478C).
The official naming by Intel for Celeron M and Pentium M Socket 479 sockets is μFCPGA and μPGA479M.
Technical specifications
Socket 479 has 479 pin holes. Pentium M processors in PGA package have 479 pins that plug into this zero insertion force socket. Only 478 pins are electrically connected (B2 is reserved and "depopulated on the Micro-FCPGA package").
Although mechanically similar, Socket 478 has one pin fewer, making it impossible to use a Pentium M processor in a Socket 478 board. For this reason, some manufacturers like Asus have made drop-in boards (e.g. CT-479) which allow the use of Socket 479 processors in Socket 478 boards. Conversely, it is impossible to use any Socket 478 desktop Celeron and Pentium 4 processors in a Socket 479 board as they are electrically incompatible with Socket 479 despite being mechanically pin-compatible. For the same reason, Celeron M and Pentium M processors are pin and electrically incompatible with Pentium III-based Socket 479 boards.
The public source identifies “Socket 479” as cPU socket. This brief keeps that definition visible, then builds a research path around Socket and socket.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Socket 479”, the useful work is to connect “cPU socket” to the records capable of establishing context and consequence.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 13, 2026. The linked authority identifier is Q845608. None of the 0 selected statements returned an explicit reference.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Socket 479”, its source revision and the description used here.
- Expand the search: follow Socket 479 primary sources, Socket 479 archive and Socket research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Socket 479”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Socket 479” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.