Desktop CPU sockets at a glance
A CPU socket is the physical and electrical interface between a processor and its motherboard. The socket determines which CPUs can physically fit, and the chipset plus BIOS determine which of those are actually supported. This reference lists the mainstream Intel and AMD desktop sockets of recent generations with their pin type, supported processor families and the years each was current.
How it works
Intel uses LGA sockets (pins on the board) and tends to change socket every one to two generations — LGA1200, then LGA1700, then LGA1851. AMD kept AM4 (a PGA socket, pins on the CPU) alive across five Ryzen generations before moving to the LGA AM5 for Ryzen 7000 and later. Compatibility requires three things to line up: the socket (physical fit), the chipset (electrical/feature support), and a BIOS version new enough to recognise the specific CPU. A matching socket with the wrong chipset or an out-of-date BIOS will not post.
Recent Intel and AMD socket generations
Intel desktop sockets
| Socket | Processor generations | Approximate years active | Pin type |
|---|---|---|---|
| LGA1151 | Core 6th–9th gen (Skylake, Kaby Lake, Coffee Lake) | 2015–2019 | LGA (board-side pins) |
| LGA1200 | Core 10th–11th gen (Comet Lake, Rocket Lake) | 2020–2021 | LGA |
| LGA1700 | Core 12th–14th gen (Alder Lake, Raptor Lake) | 2021–2024 | LGA |
| LGA1851 | Core Ultra 200 series (Arrow Lake) and forward | 2024– | LGA |
Intel’s LGA1700 had an unusually long run at three generations. LGA1851 is the current mainstream desktop platform and is not backward compatible with LGA1700 CPUs despite similar physical dimensions.
AMD desktop sockets
| Socket | Processor generations | Approximate years active | Pin type |
|---|---|---|---|
| AM4 | Ryzen 1000–5000 (Zen 1 through Zen 3) | 2016–2023 | PGA (CPU-side pins) |
| AM5 | Ryzen 7000 and later (Zen 4, Zen 5) | 2022– | LGA (board-side pins) |
AMD’s switch from PGA to LGA with AM5 was a significant change: bent-pin risk moved from the CPU (a cheap replacement) to the motherboard socket (a far more expensive fix). Handle AM5 motherboards accordingly.
The three-layer compatibility check
When buying a CPU and motherboard combination, verify all three layers:
- Socket — the CPU’s socket must physically match the motherboard’s socket. This is the binary first check: wrong socket, nothing fits.
- Chipset — within a socket, different chipsets support different CPU generations. For example, not all LGA1700 motherboards support 14th-gen CPUs even though they share the socket; the chipset version determines which generations are officially supported.
- BIOS version — newer CPUs within a shared socket often require a BIOS update before they will be recognised. Some boards need to be updated with an older CPU first, which can be a practical problem if you are building from scratch with only the new CPU available.
The safest path is to consult the specific motherboard manufacturer’s CPU Support List (usually on their website), which shows exactly which CPU models are supported and from which BIOS version.
Tips and notes
- Socket match is necessary but not sufficient — always check the chipset and the CPU support list.
- Newer CPUs on a shared socket often need a BIOS update installed with an older CPU first.
- AMD AM4 is one of the longest-lived mainstream desktop sockets in recent history — many users ran Ryzen 1000 boards with eventual Ryzen 5000 CPUs with only BIOS updates.
- Intel changes sockets more frequently — verify the exact LGA number, not just the brand or generation name.