List of Intel chipsets

This article provides a list of motherboard chipsets made by Intel, divided into three main categories: those that use the PCI bus for interconnection (the 4xx series), those that connect using specialized "hub links" (the 8xx series), and those that connect using PCI Express (the 9xx series). The chipsets are listed in chronological order.
Pre-chipset situation.
Early IBM XT-compatible mainboards did not have a chipset yet, but relied instead on a collection of discrete TTL chips by Intel:
Early chipsets.
To integrate the functions needed on a mainboard into a smaller amount of ICs, Intel licensed the ZyMOS POACH chipset for its Intel 80286 and Intel 80386SX processors (the 82230/82231 High Integration AT-Compatible Chip Set). This chipset can be used with an 82335 High-integration Interface Device to provide support for the Intel 386SX.
List of early Intel chipset includes:
4xx chipsets.
Pentium chipsets.
While not an actual Intel chipset bug, the Mercury and Neptune chipsets could be found paired with RZ1000 and CMD640 IDE controllers with data corruption bugs. L2 caches are direct-mapped with SRAM tag RAM, write-back for 430FX, HX, VX, and TX.
8xx chipsets.
Pentium 4 chipsets.
Summary:
9xx chipsets and 3/4 Series chipsets.
Pentium 4/Pentium D/Pentium EE chipsets.
All Chipsets listed in the table below: 
[*] Remapping of PCIE/APIC memory ranges not supported, some physical memory might not be accessible (e.g. limited to 3.5 GB or similar).
Summary:
Core/Core 2 mobile chipsets.
[*] Remapping of PCIE/APIC memory ranges not supported, some physical memory might not be accessible (e.g. limited to 3.5 GB or similar).
Core 2 chipsets.
All Core 2 Duo chipsets support the Pentium Dual-Core and Celeron processors based on the Core architecture. Support for all NetBurst based processors was officially dropped starting with the Bearlake chipset family. However, some motherboards still support the older processors.
[*] Remapping of PCIE/APIC memory ranges not supported, some physical memory might not be accessible (e.g. limited to 3.5 GB or similar). Operational configuration is 4 ranks - 2× 2 GB dual rank modules or 4× 1 GB single rank modules - depends on number of motherboard DDR2 slots.
Summary:
[1] The 975X chipset supports only ×16 PCI Express (electrically) in the top slot when the slot below it is unpopulated. Otherwise it and the lower slot (both attached to the Memory Controller Hub) operate at ×8 electrically.
[2] Officially 975X supports a maximum of 1066 MT/s FSB. Unofficially, third-party motherboards (Asus, Gigabyte) support certain 1333FSB 45 nm Core2 processors, usually with later BIOS updates.
[3] The 975X chipset technical specification shows only DDR2-533/667 memory support. Actual implementations of 975X do support DDR2 800.
[4] VT-d is inherently supported on these chipsets, but may not be enabled by individual OEMs. "Always" read the motherboard manual and check for BIOS updates. X38/X48 VT-d support is limited to certain Intel, Supermicro, DFI (LanParty) and Tyan boards. VT-d is broken or non existent on some boards until the BIOS is updated. Note that VT-d is a chipset Memory Controller Hub technology, not a processor feature, but this is complicated by later processor generations (Core i3/i5/i7) moving the MCH from the motherboard to the processor package, making only certain I series CPUs support VT-d.
5/6/7/8/9 Series chipsets.
The Nehalem microarchitecture moves the memory controller into the processor. For high-end Nehalem processors, the X58 IOH acts as a bridge from the QPI to PCI Express peripherals and DMI to the ICH10 southbridge. For mainstream and lower-end Nehalem processors, the integrated memory controller (IMC) is an entire northbridge (some even having GPUs), and the PCH (Platform Controller Hub) acts as a southbridge.
Not listed below is the 3450 chipset (see Xeon chipsets) which is compatible with Nehalem mainstream and high-end processors but does not claim core iX-compatibility. With either a Core i5 or i3 processor, the 3400-series chipsets enable the ECC functionality of unbuffered ECC memory. Otherwise these chipsets do not enable unbuffered ECC functionality.
The Cougar Point Intel 6 series chipsets with stepping B2 were recalled due to a hardware bug that causes their 3 Gbit/s Serial ATA to degrade over time until they become unusable. Stepping B3 of the Intel 6 series chipsets will have the fix for this. The Z68 chipset which supports CPU overclocking and use of the integrated graphics does not have this hardware bug, however all other ones with B2 did. The Z68 also added support for transparently caching hard disk data on to solid-state drives (up to 64 GB), a technology called Smart Response Technology.
LGA 1156.
Chipsets supporting LGA 1156 CPUs (Lynnfield and Clarkdale).
LGA 1155.
Chipsets supporting LGA 1155 CPUs (Sandy Bridge and Ivy Bridge). The PCIe 2.0 lanes from the PCH ran at 5 GT/s in this series, unlike in the previous LGA 1156 chips.
LGA 1150.
Chipsets that support LGA 1150 CPUs are listed below. Haswell and Haswell Refresh CPUs are supported by all listed chipsets; however, a BIOS update is usually required for 8-Series "Lynx Point" motherboards to support Haswell Refresh CPUs. Broadwell CPUs are supported only by 9-Series chipsets, which are usually referred to as "Wildcat Point".
The C1 stepping of the "Lynx Point" chipset contains a bug a system could lose connectivity with USB devices plugged into USB 3.0 ports provided by the chipset if the system enters the S3 sleep mode.
LGA 1366, LGA 2011, and LGA 2011-v3.
Single socket chipsets supporting LGA 1366, LGA 2011, and LGA 2011-v3 CPUs. Please consult List of Intel Xeon chipsets for further, multi-socket, chipsets for these sockets.
LGA 2066.
Chipsets supporting LGA 2066 socket for Skylake-X processors and Kaby Lake-X processors.
The C621 Chipset also supports FCLGA3647 socket for Skylake-SP as well as Cascade Lake-W and Cascade Lake-SP processors.
Mobile chipsets.
All Core-i series mobile chipsets have an integrated south bridge.
100/200/300 Series chipsets.
LGA 1151 rev 1.
The 100 Series chipsets (codenamed "Sunrise Point"), for Skylake processors using the LGA 1151 socket, were released in the third quarter of 2015.
The 200 Series chipsets (codenamed "Union Point") were introduced along with Kaby Lake processors, which also use the LGA 1151 socket; these were released in the first quarter of 2017.
LGA 1151 rev 2.
While Coffee Lake shares the same socket as Skylake and Kaby Lake, this revision of LGA 1151 is electrically "incompatible" with 100 and 200 series CPUs.
The 300 Series chipsets were introduced along with Coffee Lake processors, which use the LGA 1151 socket; the enthusiast model was released in the last quarter of 2017, the rest of the line was released in 2018.
Xeon chipsets.
C232 and C242 chipsets do not support CPU integrated GPUs, as they lack FDI support. Officially they support only Xeon processors, but some motherboards also support consumer processors (6/7th generation Core for C230 series, 8/9th generation Core for C240 series and its Pentium/Celeron derivatives).
400/500 Series chipsets.
LGA 1200.
LGA 1200 is a CPU socket compatible with Comet Lake desktop CPUs. Like its predecessors, LGA 1200 has the same amount of pins its name would suggest: 1200. Under the hood, LGA 1200 is a modified version of LGA 1151, its predecessor and currently the latest CPU socket for Intel CPUs. It features 49 additional protruding pins that are used to improve power delivery and provide support for eventual updates with I/O features.